Service and Maintenance Manual AFPX 513

Service & Maintenance manual High Speed Separator AFPX 513XGD-14/74CG

Product No. Book No.

881135-21-01/5 1271468-02 Rev. 3

Published By: Alfa Laval Tumba AB SE-147 80 Tumba, Sweden Telephone: +46 8 530 650 00 Telefax: +46 8 530 310 40

© Alfa Laval Laval Tumba Tumba AB 02 May 2006 2006 This publication or any part there of may not be reproduced or transmitted by any process or means without prior written permission of Alfa Laval Tumba AB.

Contents 1

2

Safety Instructions

9

1.1

Warning signs in text

14

1.2

Environmental issues

15

1.3

Requirements of personnel

16

Maintenance Directions

17

2.1

Periodic maintenance

17

2.1.1

Introduction

17

2.1.2

Maintenance interva rvals

17

2.1.3

Maintenance procedure

19

2.1.4

Service kits

20

Maintenance Logs

21

2.2.1

Daily checks

21

2. 2.2 2.2

Lub Lubric rication tion of ele lec ctric tric moto motorr

21

2.2.3

Oil change

21

2.2.4

Intermediate Se Service (I (IS)

22

2.2.5

Major Se Service (M (MS)

24

2.2.6

3-year Service (3S)

26

2.2

2.3

2.4

2.5

2.6

Cleaning

27

2.3.1

Cleaning a ag gents

27

2.3.2

External c clleaning

28

2.3.3

Cleaning of of bo bowl di discs

29

When changing oil

30

2. 2.4. 4.1 1

Worm orm whee wheell and and worm; orm; we wear ar of teet teeth h

30

2.4.2

Oil change procedure

33

Lubricants

34

2. 2.5 5.1

Lubr Lubric icat atio ion n chart hart,, gen genera eral

34

2. 2.5 5.2

Reco Recomm mmen ende ded d lubr lubric ica ating ting oils oils

36

2.5.3

Recommended oil brands

37

2.5.4

Recommended lubric ica ants

38

Vibration

42

3

Vibration analysis

42

Common maintenance directions

43

2.7.1

Ball and roller bearings

43

2.7.2

Before shutdowns

47

Dismantling/Assembly

49

3.1

Introduction

49

3.1.1

General directions

49

3.1.2

References to checkpoints

50

3.1.3

Tools

50

3.1.4

Tightening of screws

50

2.6.1

2.7

3

3.2

3.3

4

Intermediate Service (IS), dismantling

51

3.2.1

Inlet/outlet and frame hood

51

3.2.2

Bowl hood and disc stack

56

3.2.3

Bowl body and operating mechanism

62

3.2.4

Operating liquid device (IS)

66

Intermediate Service (IS), checkpoints

70

3.3.1

Introduction

70

3.3.2

Bowl hood seal ring

70

3.3.3

Bowl spindle cone and bowl body nave

71

3.3.4

Corrosion

72

3.3.5

Cracks

74

3.3.6

Dosing ring

75

3.3.7

Erosion and wear liners

75

3.3.8

Guide surfaces

79

3.3.9

Inlet pipe threads and paring disc

81

3.3.10

Lock ring; wear and damage

82

3.3.11

Operating mechanism

83

3.3.12

Operating slide

84

3.3.13

Springs for operating mechanism

84

3.3.14

Sliding bowl bottom

85

3.3.15

Worm wheel and worm; wear of teeth

85

3.3.16

Speed sensor

86

3.3.17

Vibration sensor

86

3.3.18

Cover interlocking switch (option)

87

3.3.19

3.4

3.5

3.6

3.7

Index

Limits switch

87

Intermediate Service (IS), assembly

88

3.4.1

Introduction

88

3.4.2

Lubrication

88

3.4.3

Operating liquid device

89

3.4.4


93

3.4.5


96

3.4.6


103

Major Service (MS), dismantling

107

3.5.1

Introduction

107

3.5.2

Horizontal driving device

118

Major Service (MS), checkpoints

122

3.6.1

Introduction

122

3.6.2

Lock ring; priming

122

3.6.3

Brake

124

3.6.4

Buffer springs and ball bearing housing 126

Major Service (MS), assembly

127

3.7.1

Introduction

127

3.7.2


128

3.7.3

Vertical driving device

133 145

5

6

Read and understand instruction manuals and observe the warnings before installation, operation, service and maintenance.

Not following the instructions can result in serious accidents.

In order to make the information clear only foreseeable conditions have been considered. No warnings are given, therefore, for situations arising from the unintended usage of the machine and its tools.

7

8

1

Safety Instructions

The centrifuge includes parts that rotate at high speed. This means that: •

Kinetic energy is high

•

Great forces are generated

•

Stopping time is long

1 2 4 0 1 0 0 G

Manufacturing tolerances are extremely fine. Rotating parts are carefully balanced to reduce undesired vibrations that can cause a breakdown. Material properties have been considered carefully during design to withstand stress and fatigue. The separator is designed and supplied for a specific separation duty (type of liquid, rotational speed, temperature, density etc.) and must not be used for any other purpose. Incorrect operation and maintenance can result in unbalance due to build-up of sediment, reduction of material strength, etc., that subsequently could lead to serious damage and/or injury. The following basic safety instructions therefore apply: •

Use the separator only for the purpose and parameter range specified by Alfa Laval.

•

Strictly follow the instructions for installation, operation and maintenance.

•

Ensure that personnel are competent and have sufficient knowledge of maintenance and operation, especially concerning emergency stopping procedures.

•

Use only Alfa Laval genuine spare parts and the special tools supplied.

1 1 2 1 5 1 0

S

9

1 Safety Instructions

Disintegration hazards

•

•

When power cables are connected, always check direction of motor rotation. If incorrect, vital rotating parts could unscrew.

1 F 2 1 5 1 0 S

If excessive vibration occurs, stop separator and keep bowl filled with liquid during rundown. 1 N 2 1 5 1 0 S

•

Use the separator only for the purpose and parameter range specified by Alfa Laval. 1 P 2 1 5 1 0 S

•

Check that the gear ratio is correct for power frequency used. If incorrect, subsequent overspeed may result in a serious break down.

•

Since the separator is equipped with a frequency controlled motor, it is extremely important to ensure that the motor speed does not exceed the allowed maximum speed. A serious break down may be the consequence.

•

Welding or heating of parts that rotate can seriously affect material strength.

1 L 2 1 5 1 0 S

1 4 2 1 5 1 0

S

•

•

Wear on the large lock ring thread must not exceed safety limit. φ-mark on lock ring must not pass opposite φ-mark by more than specified distance.

1 G 2 1 5 1 0 S

Inspect regularly for corrosion and erosion damage. Inspect frequently if process liquid is corrosive or erosive. 1 H 2 1 5 1 0 S

10


Entrapment hazards

•

Make sure that rotating parts have come to a complete standstill before starting any dismantling work. 1 O 2 1 5 1 0 S

•

To avoid accidental start, switch off and lock power supply before starting any dismantling work. Assemble the machine completely before start. All covers and guards must be in place.

1 6 2 1 5 1 0 S

Electrical hazard

•

Follow local regulations for electrical installation and earthing (grounding).

•

To avoid accidental start, switch off and lock power supply before starting any dismantling work.

1 7 2 1 5 1 0 S

Crush hazards

•

Use correct lifting tools and follow lifting instructions. 1 M 2 1 5 1 0 S

Do not work under a hanging load. 1 Y 2 1 5 1 0 S

11


Noise hazards

•

Use ear protection in noisy environments. 1 9 2 1 5 1 0 S

Burn hazards

•

Lubrication oil and various machine surfaces can be hot and cause burns. 1 A 2 1 5 1 0 S

Skin irritation hazards

•

•

12

When using chemical cleaning agents, make sure you follow the general rules and suppliers recommendation regarding ventilation, personnel protection etc. Use of lubricants in various situations.

1 D 2 1 5 1 0 S


Cut hazards

•

Sharp edges on bowl discs and threads can cause cuts. 1 B 2 1 5 1 0 S

Flying objects

•

Risk for accidental release of snap rings and springs when dismantling and assembly. 1 C 2 1 5 1 0 S

Health hazard

•

Risk for unhealthy dust when handling friction blocks/pads. Use a dust mask to make sure not to inhale any dust 1 V 2 1 5 1 0 S

13


1.1

Warning signs in text

Pay attention to the safety instructions in this manual. Below are definitions of the three grades of warning signs used in the text where there is a risk for injury to personnel.

DANGER Type of hazard DANGER indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.

WARNING Type of hazard WARNING indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.

CAUTION Type of hazard CAUTION indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury.

NOTE NOTE indicates a potentially hazardous situation which, if not avoided, may result in property damage.

14


1.2

Environmental issues

Unpacking Packing material consists of wood, plastics, cardboard boxes and in some cases metal straps. Wood and cardboard boxes can be reused, recycled or used for energy recovery. Plastics should be recycled or burnt at a licensed waste incineration plant. Metal straps should be sent for material recycling.

Maintenance During maintenance oil and wear parts in the machine are replaced. Oil must be taken care of in agreement with local regulations. Rubber and plastics should be burnt at a licensed waste incineration plant. If not available they should be disposed to a suitable licensed land fill site. Bearings and other metal parts should be sent to a licensed handler for material recycling. Seal rings and friction linings should be disposed to a licensed land fill site. Check your local regulations. Worn out or defected electronic parts should be sent to a licensed handler for material recycling.

15


1.3

Requirements of personnel

Only skilled or instructed persons are allowed to operate the machine, e.g. operating and maintenance staff. •

Skilled person: A person with technical knowledge or sufficient experience to enable him or her to perceive risks and to avoid hazards which electricity/mechanics can create.

•

Instructed person: A person adequately advised or supervised by a skilled person to enable him or her to perceive risks and to avoid hazards which electricity/mechanics can create.

In some cases special skilled personnel may need to be hired, like electricians and others. In some of these cases the personnel has to be certified according to local regulations with experience of similar types of work.

16

2

Maintenance Directions

2.1

Periodic maintenance

2.1.1

Introduction

Periodic (preventive) maintenance reduces the risk of unexpected stoppages and breakdowns. Follow the maintenance logs on the following pages in order to facilitate the periodic maintenance.

WARNING Disintegration hazards Separator parts that are either worn beyond their safe limits or incorrectly assembled may cause severe damage or fatal injury.

2.1.2

Maintenance intervals

The following directions for periodic maintenance give a brief description of which parts to be cleaned, checked and renewed at different maintenance intervals. The maintenance logs for each maintenance interval later in this chapter give detailed enumeration of the check points that must be done. Daily checks consist of minor check points to carry out for detecting abnormal operating conditions.

Oil change The oil change interval is every 1000-1500 hours or at least once every year if the total number of operating hours is less than 1000-1500 hours.

17

2.1 Periodic maintenance

2 Maintenance Directions

Intermediate Service (IS) Intermediate Service consists of an overhaul of the separator bowl, inlet/outlet and operating device every 3 months or 2000 operating hours. Seals in bowl and gaskets in inlet/outlet device are renewed.

Major Service (MS) Major Service consists of an overhaul of the complete separator and includes an Intermediate Service every 12 months or 8000 operating hours. Seals and bearings in the bottom part are renewed.

3-year Service (3S) 3-year Service consists of renewing the frame feet. The feet get harder with increased use and age. Periodic maintenance schedule Oil change I ntermediate S ervice = IS M ajor S ervice = MS 3 -year S ervice = 3S 3S MS IS

IS

Installation

18

IS

IS

MS IS

1st year

IS

IS

IS

MS IS

2nd year

IS

IS

IS

3rd year


2.1.3


Maintenance procedure

At each Intermediate and Major Service, take a copy of the maintenance log and use it for notations during the service. An Intermediate and Major Service should be carried out in the following manner: 1.

Dismantle the parts as mentioned in the maintenance log and described in chapter ‘‘3 Dismantling/Assembly” on page 49. Place the separator parts on clean, soft surfaces such as pallets.

2.

Inspect and clean the dismantled separator parts according to the maintenance log.

3.

Fit all the parts delivered in the service kit while assembling the separator as described in chapter ‘‘3 Dismantling/Assembly” on page 45. The assembly instructions have references to check points which should be carried out before and during the assembly.

19


2.1.4


Service kits

Special service kits are available for Intermediate Service (IS) and Major Service (MS), as well as for servicing the frame feet (3S). For other services the spare parts have to be ordered separately. Note that the parts for IS are not included in the MS kit and parts for IS and MS are not included in the 3S kit. The contents of the service kits are described in the Spare Parts Catalogue .

NOTE Always use Alfa Laval genuine parts as otherwise the warranty will become invalid. Alfa Laval takes no responsibility for the safe operation of the equipment if non-genuine spare parts are used.

WARNING Disintegration hazards Use of imitation par ts may cause severe damage.

20

1 2 0 1 2 0 0

S

Kits are available for Intermediate Service, Major Service and for servicing the frame feet


2.2 Maintenance Logs

2.2

Maintenance Logs

2.2.1

Daily checks

The necessary daily checks to be carried out for a safe operation are enumerated in chapter Running in the Operator´s Manual.

2.2.2

Lubrication of electric motor

The bearings of the electric motor shall be greased with intervals that is dependent of the motor speed (50 or 60 Hz), ambient temperature and if the bearing is located on the driving end or non driving end. The recommended interval can vary from 250 up to 5000 operating hours. Correct lubrication interval and recommended type of grease can be found on a plate fixed on the motor. The information can also be found in chapter Motor specifications in the Installation Manual.

2.2.3

Oil change

The oil change and check of worm gear should be carried out every 1000-1500 hours of operation. Note: In a new installation, or after replacement of gear, change the oil after 200 operating hours and clean the gear housing. Main component and activity

Part

Page

Notes

Horizontal driving device Worm wheel shaft and gear housing Check

Worm wheel and worm

30

Renew

Oila) in gear housing

33

When the separator is running for short periods, the lubricating oil must be changed every 12 months even if the total number of operating hours is less than 1000-1500 hours (2000 h). a)

See chapter ‘‘2.5 Lubricants” on page 34 for further information.

21


2.2.4


Intermediate Service (IS)

Name of plant: Separator:

Local identification: AFPX 513XGD-14/74CG

Manufacture No./Year:

Total running hours:

Product No:

Date:

Signature:

Main component and activity

Part

881135-21-01/4

Page

Inlet and outlet Clean and inspect

Connecting housing

–

Threads of inlet pipe

77

Paring disc

-

Separator bowl Clean and check

Lock ring

78

Bowl hood

66

Bowl discs

29

Distributor

–

Distributing cone

–

Sliding bowl bottom Bowl body

81 –

Guide surfaces

75


67

Operating mechanism

71, 79, 80, 80,

Paring chamber Check

Renew

22

Corrosion

68

Cracks

70


71

Galling of guide surface

76

Disc stack pressure

97

O-rings and sealings

–

Notes




Part

Page

Notes

Operating liquid device Clean and check


–

Renew

O-rings

–


Worm wheel and worm

30

Renew

Oil in gear housing

33

See sign on motor

–

Safety label on hood

-

Direction of rotation arrow

-

Power supply frequency

-

Electrical motor Lubrication (if nipples are fitted) Signs and labels on separator Check attachment and legibility

Monitoring equipment Function check

Vibration sensor

82

Speed sensor

82


83

Note: Renew all parts included in the Intermediate Service kit (IS).

23


2.2.5


Major Service (MS)

Name of plant: Separator:

Local identification: AFPX 513XGD-14/74CG

Manufacture No./Year:

Total running hours:

Product No:

Date:

Signature:


Part

881135-21-01/4

Page

Inlet and outlet Clean and inspect

Connecting housing

–

Threads of inlet pipe

77

Paring disc

-

Separator bowl Clean and check

Lock ring

78

Bowl hood

66

Bowl discs

29

Distributor

–

Distributing cone

–

Sliding bowl bottom Bowl body

81 –

Guide surfaces

75


67

Operating mechanism

71, 79, 80, 80,

Paring chamber Check

Renew

24

Corrosion

68

Cracks

70


71

Galling of guide surface

76

Disc stack pressure

97

Height position of outlet paring disc

101

O-rings and sealings

–

Notes




Part

Page

Notes

Operating liquid device Clean and check


–

Check

Height position

Renew

O-rings

–

Bowl spindle

–

88

Vertical driving device Clean and check

Buffer springs and ball bearing housing

122

Check

Radial wobble of bowl spindle

135

Renew

Spindle bearings, sealings and rubber buffers

129

Worm wheel and worm

30

Radial wobble of worm wheel shaft

128

Bearings, O-rings and sealings

114

Oil in gear housing

33

Clean and check

Spring and brake shoe

121

Renew

Friction pad

120

Axial play of elastic plates

126


Renew

Brake

Flexible coupling Check Electrical motor Lubrication (if nipples are fitted)

See sign on motor

–

Safety label on hood

-

Direction of rotation arrow

-

Power supply frequency

-

Signs and labels on separator Check attachment and legibility

Monitoring equipment Function check

Vibration sensor

82

Speed sensor

82


83

Note: Renew all parts included in the Intermediate Service kit (IS) and Major Service kit (MS).

25


2.2.6


3-year Service (3S)

Renew the frame feet as described below. The 3year service should be carried out in conjunction with a Major Service (MS). The extent of the 3-year service is the same as for a major service plus renewing the parts included in the 3-year Service kit (3S).

Frame feet, renewal 1. Disconnect pipes, hoses and cables connected to the separator. 2. Remove the nuts (1, 2). 3. Lift the separator.

NOTE When lifting a separator it must always hang securely. See separate instruction in chapter Lifting instructions in the Installation Manual . 1 2 9 8 5 2 0 G

4. Renew the vibration dampers (3, 4). 5. Lower the frame. Check that the bolts do not press against the edges of the holes. 6. Tighten the nut (2) to 20 Nm. 7. Hold the nut (2) firmly and secure with the lock nut (1). 8. Connect the previously disconnected pipes, hoses and cables. .

26

1. 2. 3. 4.

Lock nut Nut Vibration damper, upper Vibration damper, lower


2.3

Cleaning

2.3.1

Cleaning agents

2.3 Cleaning

When using chemical cleaning agents, make sure you follow the general rules and suppliers’ recommendations regarding ventilation, protection of personnel, etc.

For separator bowl, inlet and outlet A chemical cleaning agent must dissolve the deposits quickly without attacking the material of the separator parts.

CAUTION Skin irritation hazard Read the instructions on the label of the container before using the chemical cleaning agent. Always wear safety goggles, gloves and protective clothing as the liquid is alkaline and dangerous to skin and eyes.

For operating mechanism Use 10% acetic acid solution to dissolve lime deposits. The acid should be heated to 80 °C.

For parts of the driving devices Use white spirit, cleaning-grade kerosene or diesel oil.

Oiling (protect surfaces against corrosion) Protect cleaned carbon steel parts against corrosion by oiling. Separator parts that are not assembled after cleaning must be wiped and coated with a thin layer of clean oil and protected from dust and dirt.

27

2.3 Cleaning

2.3.2


External cleaning

The external cleaning of the frame and motor should be restricted to brushing, sponging or wiping while the motor is running or is still hot. Never wash down a separator with a direct water stream. Totally enclosed motors can be damaged by direct hosing to the same extent as open motors and even more than those, because: • •

•

Many operators believe that these motors are sealed, and normally they are not. A water jet played on these motors will produce an internal vacuum, which will suck the water between the metal-to-metal contact surfaces into the windings, and this water cannot escape.

1 2 1 5 4 5 0 G

Never wash down a separator with a direct water stream or playing a water jet on the motor

Water directed on a hot motor may cause condensation resulting in short-circuiting and internal corrosion.

Be careful even when the motor is equipped with a protecting hood. Never play a water jet on the ventilation grill of the hood (if any).

1 3 1 5 4 5 0 G

Use a sponge or cloth and a brush when cleaning

28


2.3.3

2.3 Cleaning

Cleaning of bowl discs

Handle the bowl discs carefully so as to avoid damage to the surfaces during cleaning.

NOTE Mechanical cleaning is likely to scratch the disc surfaces causing deposits to form quicker and adhere more firmly. A gentle chemical cleaning is therefore preferable to mechanical cleaning.

CAUTION Cut hazard Sharp edges on the separator discs may cause cuts.

1.

2.

Remove the bowl discs from the distributor and lay them down, one by one, in the cleaning agent. Let the discs remain in the cleaning agent until the deposits have been dissolved. This will normally take between two and four hours.

1 3 8 5 6 0 0 G

Put the discs one by one into the cleaning agent

3. Finally clean the discs with a soft brush.

1 4 8 5 6 0 0 G

Clean the discs with a soft brush

29

2.4 When changing oil

2.4

When changing oil

2.4.1

Worm wheel and worm; wear of teeth


To check at each oil change Check the teeth of both the worm wheel and worm for wear. Examine the contact surfaces and compare the tooth profiles with the ‘‘ Tooth appearance examples” on page 32. The gear may operate satisfactorily even when worn to some degree. •

Replace both worm wheel and worm at the same time, even if only one of them is worn.

•

To avoid damaging the teeth when lifting the bowl spindle: push the worm wheel to one side first. Position the spindle in correct place before fitting the worm wheel.

1 1 3 5 0 2 0 G

1 2

Worm Worm wheel

When replacing the gear, always make sure that the new worm wheel and worm have the same number of teeth as the old ones. See chapter Technical data in the Installation Manual for correct number of teeth.

WARNING Disintegration hazards Check that gear ratio is correct for power frequency used. If incorrect, subsequent overspeed may result in a serious breakdown.

1 1 4 5 0 2 0 G

Check the gear ratio (number of teeth) when replacing the gear

NOTE Presence of metal chips in the oil bath is an indication that the gear is wearing abnormally.

30



Important! When using mineral-type oil in the worm gear housing, the presence of black deposits on the spindle parts is an indication that the oil base has deteriorated seriously or that some of the oil additives have precipitated. If pitting is found on the worm gear, the cause could be that the additives are not suitable for this purpose. In all these cases it is imperative to change to a high-temperature oil. For further information, see chapter ‘‘2.5 Lubricants” on page 34.

31



Tooth appearance examples Satisfactory teeth: Uniform wear of contact surfaces. Surfaces are smooth. Good contact surfaces will form on the teeth when the gear is subjected to only moderate load during its running-in period.

1 1 7 8 3 5 0 G

Satisfactory teeth

Worn teeth: Permissible Permissible wear is as a rule ru le 1/3 of the thickness of the upper part of a tooth, provided that •

the wear is uniform over the whole of the flank of a tooth

•

and all teeth are a re worn in the same way. way.

1 1 8 8 3 5 0 G

Worn teeth

Spalling: Small bits of the teeth have broken off, so-called spalling. This is generally caused by excessive excessive load or improper lubrication. Damage of this type may not necessitate immediate replacement, but careful checking at short intervals is of imperative importance.

1 1 9 8 3 5 0 G

Spalling

Pitting: Small cavities in the teeth, so-called pitting, can occur through excessive load or improper lubrication. Damage of this type need not necessitate immediate replacement, but careful check at short intervals inter vals is of imperative importance.

32

1 1 0 9 3 5 0 G

Pitting


2.4.2


Oil ch change pr procedure

NOTE Before adding or renewing lubricating oil in the worm gear housing, the information concerning different oil groups, handling of oils, oil change intervals etc. given in chapter ‘‘2.5 Lubricants” on page 34 must 34 must be well known. 1 1 4 4 3 1 0 G

1. 2. 3.

Cover Sight glass Oil drain plug

1. Place Place a coll collect ecting ing ttra ray y under under the the drain drain ho hole, le, remove the drain plug (3) and then drain off the oil.

CAUTION 1 2 9 5 3 0 0 G

Burn hazards Lubricating oil and various machine surfaces can be sufficiently hot to cause burns.

Burn hazards: The drained oil may be hot

2. Fill Fill new new oil in the the worm worm gear gear housi housing. ng. The The oil oil level level should be slightly above middle of the th e sight glass. Oil volume: approx. 8 litres. litres. Suitable oil brands can be found in ‘‘2.5.3 Recommended oil brands” on page 37. 37. 1 1 0 2 6 2 0 G

NOTE During operation the oil level must be slightly below the middle of the sight glass.

The oil level must not be above the middle of the sight glass

If the oil level is too high, the lifetime of the rolling bearings will be reduced due to high temperature.

33

2.5 Lubricants

2.5

Lubricants

2.5. 2.5.1 1

Lubr Lubriica cati tion on chart hart,, gen gener eral al


Alfa Laval ref. 553216-01, rev. 6

Lubricating points

Lubricants

Bowl spindle ball bearings and buffers are lubricated by oil mist.

Lubricating oil as specified in ‘‘2.5.2 Recommended lubricating oils” on page 36. 36.

Bowl spindle taper.

Lubricating oil (only a few drops for rust protection).

Metal buffers of bowl spindle.

Lubricating oil.

Bowl:

Pastes as specified in ‘‘‘‘2.5.4 2.5.4 Recommended lubricants” on page 38. 38.

Sliding contact surfaces and pressure loaded surfaces such as lock rings, threads of lock rings, bowl hood, and cap nut. Rubber seal rings.

Grease as specified in ‘‘‘‘2.5.4 2.5.4 Recommended R ecommended lubricants” on page 38. 38.

Friction coupling ball bearings.

The bearings are packed with grease and sealed and need no extra lubrication.

Electric motor (if nipples are fitted).

Follow manufacturer’s instructions.

NOTE The Lubrication chart, general can general can be complemented with more detailed charts, showing the lubrication points in detail and what type of lubricant to use. Instructions related to a specific design of the machine, refer to the general assembly drawings. Some application processes demand special lubrication. If not specified otherwise, follow the supplier’s recommendation about method of application.

34


2.5 Lubricants

Alfa Laval Lubricating Oil Groups •

Group A oil: a high quality gear oil on paraffin base with stable AW (anti wear) additives.

•

Group B oil: a high quality gear oil on paraffin base with stable EP (extreme pressure) additives.

•

Group D oil: a synthetic base oil with additives stable at high operating temperatures.

•

Group E oil: Characteristics as a group D-oil but suitable at a higher operation power (≤55 kW)

•

Do not mix different oil brands or oils from different oil groups. Always use clean vessels when handling lubricating oil. Great attention must be paid not to contaminate the lubricating oil. Of particular importance is to avoid mixing of different types of oil. Even a few drops of motor oil mixed into a synthetic oil may result in severe foaming. Any presence of black deposits in a mineral type oil is an indication that the oil base has deteriorated seriously or that some of the oil additives have precipitated. Always investigate why black deposits occurs.

•

If it is necessary to change from one group of oil brand to another it is recommended to do this in connection with an overhaul of the separator. Clean the gear housing and the spindle parts thoroughly and remove all deposits before filling the new oil.

NOTE Always clean and dry parts (also tools) before lubricants are applied.

CAUTION Check the oil level before start. Top up when necessary. Oil volume = see “Technical Data”.

•

It is of utmost importance to use the lubricants recommended in our documentation. This does not exclude, however, the use of other brands, provided they have equivalently high quality properties as the brands recommended. The use of oil brands and other lubricants than recommended, is done on the exclusive responsibility of the user or oil supplier.

Applying, handling and storing of lubricants •

Always be sure to follow lubricants manufacturer's instructions.

35

2.5 Lubricants

2.5.2


Recommended lubricating oils

Alfa Laval ref. 553219-08, rev. 0

Type of frame X 10 with motor 25-45 kW. One group of lubricating oil is approved for this separator. It is designated as lubricating oil group B. The numerical value after the letter states the viscosity grade. The corresponding commercial oil brands are found in chapter ‘‘2.5.3 Recommended oil brands” on page 37. Ambient temperature (°C)

Alfa Laval lubricating oil group

Time in operation Oil change interval

between +5 and +45

B/320

1 500 h

Note: •

In a new installation or after change of gear transmission, change oil after 200 operating hours.

•

When the separator is operated for short periods, lubricating oil must be changed every 12 months even if the total number of operating hours is less than stated in the recommendations above.

•

Check and prelubricate spindle bearings on separators which have been out of service for 6 months or longer.

•

In seasonal operation: change oil before every operating period.

36


2.5.3

2.5 Lubricants

Recommended oil brands

Paraffinic mineral lubricating oil, category (ISO-L-) CKE 320. Alfa Laval ref. 553218-07, rev. 3

NOTE The following is a list of recommended oil brands. Trade names and designations might vary from country to country. Please contact your local oil supplier for more information.

Alfa Laval lubrication oil group B Viscosity grade VG (ISO 3448/3104) Viscosity index VI (ISO 2909)

VG 320 VI >90

Manufacturer

Designation

ChevronTexaco

Texaco/Caltex Meropa 320

Shell

Omala 320 (Omala RL 320) * Synthetic

* These oils must be used when the frame temperature is above 80 °C. If the temperature can't be measured, a rough estimate is that 80 C is when one can touch the surface of lower part of frame only for a short time.

The list of recommended oil brands are not complete. Other oil brands may be used as long as they have equivalently quality as the brands recommended. The oil must have the same viscosity class and shall follow the requirements in one of the standards below. The oil must also be endorsed for worm gear with brass worm wheel. The use of other lubricants than the recommended is done on the exclusive responsibility of the user or oil supplier.

Standard

Designation

ISO 12925-1, (ISO 6743/6)

ISO-L-CKC/CKD/CKE/CKT 320

DIN 51517 part 3

DIN 51517 - CLP 320

37

2.5 Lubricants

2.5.4


Recommended lubricants

553217-01, rev. 10

NOTE The data in below tables is based on supplier information in regards to lubrication properties. Trade names and designations might vary from country to country. Please contact your local supplier for more information. Brands with Alfa Laval article number are approved and recommended for use.

Pastes for non-food applications: Manufacturer

Designation

Fuchs Lubritech

Gleitmo 805K Gleitmo 705

Dow Corning

Molykote 1000 (Paste) Molykote 1000 (Paste) Molykote G-rapid plus (Paste)

Rocol

Dry Moly Paste MT-LM

Klüber

Wolfracoat C (Paste)

Alfa Laval No

537086-02 (1000 g) 537086-03 (100 g) 537086-04 (50 g)

Bonded coatings: Manufacturer

Designation

Fuchs Lubritech

Gleitmo 900 (Varnish or spray)

Dow Corning

Molykote D321R (Spray) Molykote D321R (Varnish) Molykote D321R (Paste)

38

Alfa Laval No

535586-01 (400 ml) 535586-02 (60 ml) 535586-80 (25 ml)


2.5 Lubricants

Pastes for hygienic applications (NSF registered H1 is prefered): Manufacturer

Designation

Fuchs Lubritech Gleitmo 805

Hygienic Comment DVGW (KTW) approval for drinking water (TZW prüfzeugnis)

Geralyn 2

NSF Registered H1 (3 sep 2004)

Bremer & Leguil, Fuchs Lubritech

Rivolta F.L.A

NSF Registered H1 (15 Feb 2003) German §5 Absatz 1 LMBG approved

Dow Corning

Molykote TP 42 Molykote D

Klüber

Rocol

Alfa Laval No

Molykote P1900

NSF Registered H1 (7 Jan 2004)

Klüberpaste 46 MR 401

White; contains no lead, cadmium, nickel, sulphur nor halogens.

Klüberpaste UH1 96-402

NSF Registered H1 (25 Feb 2004)

Foodlube Multi Paste

NSF Registered H1 (13 Apr 2001)

561764-01

(50 g)

39

2.5 Lubricants


Silicone grease for rubber rings: Manufacturer Designation

Follows according. to Manufacturer

Dow Corning

Molykote 111 (Compound) Molykote 111 (Compound)

Conform to the FDA 539474-02 regulations (21 CFR 178.3570) for occasional 539474-03 food contact. Certified: National Water Council UK and WRC, UK. Certified: food industry as per Chemical Testing Laboratory Dr. Böhm, Munich.

(100 g)

Molykote Foodslip SR grease

Former USDA H1 approved. 569415-01

(50 g)

Chemplex 750

DVGW approved according to the German KTWrecomendations for drinking water.

Bremer & Leguil Rivolta F.L.G MD2

NSF Registered H1 (15 Feb 2003)

Unisilkon L 250 L

Complies with German Environmental Agency on hygiene requirements for tap water. Certified by DVGWKTW, WRC, AS4020, ACS.

Paraliq GTE 703

NSF Registered H1 (25 Feb 2004) Complies with LMBG and the European standard EN 1672, part2.

Bel-Ray

No-Tox Silicone valve seal

NSF Registered H1 (19 June 2002)

MMCC

ALCO 220

NSF Registered H1 (25 March 2002)

Rocol

Foodlube Hi-Temp

NSF Registered H1 (18 April 2001)

Fuchs Lubritech

Klüber

40

Alfa Laval No

(25 g)


2.5 Lubricants

Greases for ball and roller bearings:

NOTE Always follow the specific recommendation for lubrication as advised by the manufacturer.

Manufacturer

Designation

BP

Energrease MP-MG2 Energrease LS2 Energrease LS-EP2

Castrol

APS 2 Spheerol EPL 2

Chevron Texaco

Chevron Dura-Lith Grease EP2 Texaco Multifak AFB 2

Dow Corning

Molykote G-0101 Molykote Multilub

ExxonMobil

Beacon EP2 Unirex N2 Mobilith SHC 460 Mobilux EP2

Fuchs Lubritech

Lagermeister EP2

Q8/Kuwait Petroleum

Rembrandt EP2

Shell

Alvania EP 2 Albida EP2

SKF

LGEP 2 LGMT 2

Total

Multis EP2

Alfa Laval No

41

2.6 Vibration

2.6


Vibration

NOTE The data in below tables is based on supplier information in regards to lubrication properties. Trade names and designations might vary from country to countr y, contact your local supplier for more information. Brands with Alfa Laval article number are approved and recommended for use.

2.6.1

Vibration analysis

Excessive vibration or noise indicates a malfunction. Stop the separator and identify the cause. Use vibration analysis instrument to periodically check and record the level of vibration. See the illustration where to take measurements.

NOTE The level of vibration should not exceed 9,0 mm/s at full speed.

1 3 4 0 2 1 0 G

Measuring points for vibration analysis

WARNING Disintegration hazards If excessive vibration occurs, keep bowl filled and stop separator. The cause of the vibration must be identified and corrected before the separator is restarted. Excessive vibration can be due to incorrect assembly or poor cleaning of the bowl.

42


2.7

Common maintenance directions

2.7.1

Ball and roller bearings

2.7 Common maintenance directions

Special-design bearings for the bowl spindle The bearings used for the bowl spindle are specified to withstand the speed, vibration, temperature and load characteristics of highspeed separators. 1 2 3 7 8 5 0 G

Only Alfa Laval genuine spare parts should be used. A bearing that appears equivalent to the genuine may differ considerably in various respects: inside clearances, design and tolerances of the cage and races as well as material and heat treatment.

1 2 3 4

Outer race Ball/roller Inner race Cage

NOTE Using an incorrect bearing can cause a serious breakdown with damage to equipment as a result. Do not re-fit a used bearing. Always replace it with a new.

Dismantling For bearings where no driving-off sleeve is included in the tool kit, remove the bearing from its seat by using a puller. If possible, let the puller engage the inner ring, then remove the bearing with a steady force until the bearing bore completely clears the entire length of the cylindrical seat. The puller should be accurately centred during dismantling; otherwise, it is easy to damage the seating.

NOTE

1 1 4 7 8 5 0 G

For bearings where no driving-off sleeve is included in the tool kit, use a puller when removing bearings

Do not strike with a hammer directly on the bearing.

43



Cleaning and inspection Check shaft (spindle) end and/or bearing seat in the housing for damage indicating that the bearing has rotated on the shaft (spindle) and/or in the housing respectively. Replace the damaged part(s), if the faults cannot be remedied by polishing.

Assembly •

Leave new bearings in original wrapping until ready to fit. The anti-rust agent protecting a new bearing should not be removed before use.

•

Maintain the greatest cleanliness when handling the bearings.

•

To facilitate assembly and also reduce the risk of damage, first clean and then lightly oil the bearing seating on shaft (spindle) or alternatively in housing, with a thin oil.

1 1 5 7 8 5 0 G

Clean and oil the bearing seating before assembly

When assembling ball bearings, the bearings must be heated in oil to max. 125 °C.

•

NOTE Heat the bearing in a clean container. Use only clean oil with a flash point above 250 °C. The bearing must be well covered by the oil and not be in direct contact with the sides or the bottom of the container. The bearing should be supported or suspended in the oil bath.

44

1 1 6 7 8 5 0 G

The bearing must not be in direct contact with the container



WARNING Burn hazards Use protective gloves when handling the heated bearings.

•

•

There are several basic rules for assembling cylindrical bore bearings: −

Never directly strike a bearing’s rings, cage or rolling elements while assembling. A ring may crack or metal fragments break off.

−

Never apply pressure to one ring in order to assemble the other.

−

Use an ordinary hammer. Hammers with soft metal heads are unsuitable as fragments of the metal may break off and enter the bearing.

−

Make sure the bearing is assembled at a right angle to the shaft (spindle).

If necessary use a driving-on sleeve that abuts the ring which is to be assembled with an interference fit, otherwise there is a risk that the rolling elements and raceways may be damaged and premature failure may follow.

1 1 7 7 8 5 0 G

Use a driving-on sleeve for bearings that are not heated

Angular contact ball bearings Always fit single-row angular contact ball bearings with the wide shoulder of the inner race facing the axial load (upwards on a bowl spindle).

1 1 2 7 8 5 0 G

The wide shoulder of the inner race must face the axial load

45


Lubrication

NOTE Since roller bearings are normally treated only with rust protection oil from the factory, an initial lubrication of new bearings must always be performed whenever bearings are replaced. The initial lubrication implies adding a few drops of lube oil to the bearings. Use the same oil type as in the separator worm gear housing.

46



2.7.2


Before shutdowns

Before the separator is shut-down for a period of time, the following must be carried out: •

Remove the bowl, according to instructions in chapter ‘‘3 Dismantling/Assembly” on page 45.

NOTE The bowl must not be left on the spindle during standstill for more than one week. Vibration in foundations can be transmitted to the bowl and produce one-sided loading of the bearings. The resultant indentations in the ball bearing races can cause premature bearing failure.

•

Protect cleaned carbon steel parts against corrosion by oiling. Separator parts that are not assembled after cleaning must be wiped and protected against dust and dirt.

•

If the separator has been shut-down for more than 3 months but less than 12 months, an Intermediate Service (IS) has to be made. If the shut-down period has been longer than 12 months, a Major Service (MS) should be carried out.

47


48


3

Dismantling/Assembly

3.1

Introduction

3.1.1

General directions

The separator must be dismantled regularly for cleaning and inspection. The recommended intervals are stated in chapter ‘‘2.1.2 Maintenance intervals” on page 17.

WARNING Entrapment hazard Make sure that rotating parts have come to a complete standstill before starting any dismantling work. The revolution counter and the motor fan indicate if separator parts are rotating or not.

The frame hood and heavy bowl parts must be lifted by hoist. Position the hoist directly above the bowl centre. Use an endless sling and a lifting hook with catch.

1 2 2 6 4 2 0 G

The revolution counter indicates if the separator still is rotating

These parts must be handled carefully. Do not place parts directly on the floor, but on a clean rubber mat, fibreboard or a suitable pallet.

NOTE Never interchange bowl parts To prevent mixing of par ts, e.g. in an installation comprising several machines of the same type, the major bowl parts carry the machine manufacturing number or its last three digits.

49

3.1 Introduction

3.1.2

3 Dismantling/Assembly

References to checkpoints

In the beginning of each sub-chapter describing the assembly you will find references to the check point instructions included in separate chapters. The references appear in the text as in the following example:

Check point

✔

‘‘3.3.2 Bowl hood seal ring” on page 70 It is assumed that these check points are done before starting the assembly.

3.1.3

Tools

Special tools from the tool kit must be used for dismantling and assembly. The special tools are specified in the Spare Parts Catalogue and are shown as illustrations together with the dismantling/assembly instructions.

NOTE When lifting parts without weight specifications, always use lifting straps with the capacity of at least 500 kg.

3.1.4

Tightening of screws

When tightening screws, use the torques stated in the table below unless otherwise stated. The figures apply to oiled, stainless screws tightened with a torque wrench. METRIC THREAD

50

Thread

Torque (stainless steel) Nm

M6

7

M8

18

M10

35

M12

64

M16

157

M20

304

M24

500


3.2

Intermediate Service (IS), dismantling

3.2.1


3.2 Intermediate Service (IS), dismantling

1 2 7 8 0 8 0

G

1. 2. 3. 4. 5. 6. 7. 8.

Nipple Rectangular ring Inlet pipe O-ring Cap nut Washer Coupling nut Connecting sleeve

9. 10. 11. 12. 13. 14. 15. 16.

Rectangular ring Diaphragm Pressure gauge Discharge cover Screw Guide ring Height adjusting rings Frame hood

51



1. Unscrew the coupling nuts for inlet hose and outlet hose. Disconnect the in- and outlet pipes. 2. Remove the rectangular rings.

1 1 0 6 0 8 0 G

3. Loosen the paring disc from the discharge cover by turning the inlet pipe. Left-hand thread!

1 2 8 2 7 0 0 S

1 1 1 6 0 8 0 G

4. Remove the inlet pipe.

1 1 2 6 0 8 0 G

52


5.


Unscrew the nuts holding the discharge housing and remove it from the frame hood.

1 1 5 7 0 8 0 G

6.

Unscrew the hook screws holding the frame hood.

1 2 9 6 0 8 0 G

7.

Lift the frame hood with lifting straps attached to the handles. Remove the O-ring.

1 2 0 7 0 8 0 G

53



In case of major service. 8. Unscrew the hook screws holding the frame ring.

1 2 1 7 0 8 0 G

9. Lift off the frame ring. 10. Remove the O-ring.

1 2 3 7 0 8 0 G

54



55


3.2.2



1 9 6 3 2 9 0 G

56


1.

Small lock ring

2.

Paring chamber top part

3.

O-ring

4.

Gasket

5.

Paring disc complete (2 pieces)

6.

Gravity disc

7.

O-ring

8.

Paring chamber, lower part

9.

O-rings


10. Lock ring 11. O-ring 12. Bowl hood 13. Seal ring 14. O-ring 15. Top disc 16. Bowl discs (thinner caulks than other discs in the disc stack) 17. Bowl discs 18. Wing insert 19. Bottom bowl disc (caulks on both sides) 20. Distributor

A.

Purifier, Bowl no: 558927-02, -09

B.


C.


D.

Concentrator, Bowl no: 558927-03, -10

E.


F.

Concentrator, Bowl no: 558927-06, -07, -13, -14

H.

Concentrator, Bowl no: 558927-16

57



1. Unscrew and remove the lock ring using the spanner. Left-hand thread!

1 1 1 3 0 1 0 S

2.

1 2 4 9 0 8 0 G

Remove −

paring chamber top part,

−

paring disc top and bottom part,

−

gravity disc,

−

paring chamber lower part,

−

Remove all O-rings.

1 3 8 7 0 8 0 G

3. Apply the brake.

1 2 1 0 2 5 0 G

58



4. Compress the disc stack a. Fit (1) the lifting tool on the bowl hood. b.

Fit the compressing tool on the lifting tool. Use the lever arm to screw (2) the threaded pillar of the tool into the distributor. The switch on the compressing tool should be in position 0.

c.

Turn the switch (3) to position 1 for compression.

d. Compress the disc stack by pumping (4) with the lever arm. The compressing tool is hydraulic and is fitted with a relief valve.

5.

1 1 9 1 8 5 0 G

Unscrew the large lock ring using the spanner and tin hammer. Left-hand threads!

NOTE The large lock ring must be placed resting on a flat and horizontal surface to avoid distortion. Only slight distortion can make it impossible to refit. 1 2 3 2 8 5 0 G

6. Remove the compressing tool a. Release the pressure in the compressing tool. Turn the switch (1) to position 0. b.

Loosen the compressing tool from the bowl hood. Use the lever arm to screw (2) the threaded pillar of the tool out of the distributor.

1 2 9 1 8 5 0 G

59



7. Fit the lifting eyes and remove the large lock ring with a hoist.

1 1 2 8 7 0 0 S

NOTE The large lock ring must be placed resting on a flat and horizontal surface to avoid distortion. Only a slight distortion can make it impossible to refit.

1 2 5 1 3 5 0 G

8. Lift off the bowl hood with a hoist. Be careful not to scratch the bowl hood seal ring.

CAUTION Crush hazard If the top disc is stuck into the bowl hood, remove it now before it accidentally falls out.

9. Remove the O-ring and seal ring on the bowl hood. 10. Remove the top disc.

60

1 3 0 7 9 4 0

G



11. Fit the lifting tool into the distributor and lift the distributor with disc stack out of the bowl body with a hoist.

CAUTION Cut hazard Sharp edges on separator discs may cause cuts.

1 2 1 7 9 4 0 G

1 1 3 0 9 0 0 S

61


3.2.3



1.

Cap nut

2.

O-ring

3.

Distributing cone A. Purifier bowl B. Concentrator bowl

4.

Sliding bowl bottom

5.

O-ring

6.

Screw

7.

O-ring

8.

Bowl body

9.

Wear protection

10. O-ring 11. Rectangular ring 12. Valve plug 13. Operating slide 14. Screw 15. Insert ring 16. Dosing ring 17. Screw 18. Nozzle *)

*) Secured with Loctite 242

62

1 5 6 3 2 9 0 G


1.


Remove the cap nut using the hook spanner. Left-hand threads!

1 1 6 7 0 8 0 G

2.

Fit the lifting tool to the distributing cone and lift it out.

1 1 0 0 1 8 0 G

3.

Fit the lifting tool to the sliding bowl bottom and lift it out with a hoist. Remove the rectangular ring by blowing compressed air through hole on underside of sliding bowl bottom.

1 1 1 0 1 8 0 G

4.

Remove the three screws in the bottom of the bowl.

1 1 2 0 1 8 0 G

5.

Fasten the lifting tool to the bowl body. Screw back the lifting eye to allow the three screws to be properly screwed down. Tighten the three screws to the bowl. Ease off the bowl body from the bowl spindle top by tightening the central screw (lifting eye). 1 1 3 0 1 8 0 G

63



6. Lift out the bowl body using a hoist.

1 2 4 0 1 8 0 G

7. Remove the O-ring on the bowl body nave. Thread a strap through two sludge ports and turn the bowl body upside down with a hoist.

WARNING Crush hazards Support the bowl body when turning to prevent it from rolling.

1 2 8 5 1 6 0

G

8. Loosen the screws holding the dosing ring i place.

1 1 6 0 1 8 0 G

64


9.


Fit the lifting eye bolts to the dosing ring and lift it off.

1 1 1 8 7 0 0 S

1 1 7 0 1 8 0 G

10. Remove the O-rings on the bowl body and operating slide. 11. Lift off the operating slide.

1 1 8 0 1 8 0 G

12. The insert ring should normally not be removed. But if, loosen the screws holding the insert ring and remove the ring. 13. Remove deposits and clean all parts thoroughly in a suitable cleaning agent. See chapter ‘‘2.3 Cleaning” on page 27. 1 1 9 0 1 8 0 G

65


3.2.4


Operating liquid device (IS)

1.

Hydraulic piston

2.

Rectangular ring

3.

O-ring

4.

O-ring

5.

Cover

6.

Screw

7.

Paring disc

8.

Gasket

9.

O-ring

10. Cover 11. Distributing cover 12. O-ring

1 3 0 8 7 8 0 G

66


1.


Slacken the screws of the paring disc with a hexagon wrench and unscrew with a suitable screw driver.

1 2 7 1 3 1 0 G

2. Lift out the paring disc device.

1 1 0 8 8 5 0 G

3.

Loosen and undo the liquid hoses (1) from the operating liquid pipes.

1 6 2 1 8 6 0 G

67



4. Unscrew the screws and lift up the distributing cover including the liquid pipes. Then separate the pipes from the cover.

1 1 1 8 8 5 0 G

5. To dismantle the paring disc device turn it upside down and remove the screws.

1 1 2 8 8 5 0 G

68



6. Remove deposits and clean all parts thoroughly in a suitable cleaning agent. Pay special attention to the channels. See chapter ‘‘2.3 Cleaning” on page 27. 7.

Check the parts for damage and corrosion.

1 1 2 9 8 5 0 G

69

3.3 Intermediate Service (IS), checkpoints

3.3

Intermediate Service (IS), checkpoints

3.3.1

Introduction


This chapter consists of checkpoints that can be done when the separator has been dismantled for Intermediate Service but before it is assembled. Other checkpoints that can be done only in the conjunction with the assembly are described in the assembly sections.

3.3.2

Bowl hood seal ring

Poor sealing between the bowl hood seal ring and the sealing edge of the sliding bowl bottom will cause a leakage of process liquid from the bowl. Renew the bowl hood seal ring at each Intermediate Service (IS).

1 1 2 6 0 2 0 G

Max. permitted indentation of the seal ring is 1 mm

Knock out the old ring by means of a pin inserted in the holes intended for this purpose.

1 1 3 6 0 2 0 G

Removal of the seal ring

70



Fit the new ring as follows: Press the ring into the groove with a straight wooden board placed across the ring. .

NOTE If the new ring is too narrow, place it in hot water (70-80 °C) for about 5 minutes. If it is too wide, it will shrink after drying at 80-90 °C for about 24 hours.

1 1 4 6 0 2 0 G

Fitting of the seal ring

3.3.3


Impact marks on the spindle cone or in the bowl body nave may cause poor fit and out-of-balance vibrations. The bowl spindle and the nave should also be checked if the bowl spindle has been dismantled or if the bowl runs roughly. Corrosion may cause the bowl to stick firmly to the spindle cone and cause difficulties during the next dismantling. •

Remove any impact marks with a scraper and/or whetstone.

Rust can be removed by using a fine-grain emery cloth (e.g. No. 320). Finish with polishing paper (e.g. No. 600).

NOTE Always use a scraper with great care. The cone shape must not be deformed. 1 2 9 7 4 5 0 G

Remove impact marks from the nave and cone

71


3.3.4


Corrosion

Evidence of corrosion attack should be looked for and rectified each time the separator is dismantled. Main bowl parts such as the bowl body, bowl hood and lock ring must be inspected with particular care for corrosion damage.

WARNING Disintegration hazard Inspect regularly for corrosion damage. Inspect frequently if the process liquid is corrosive.

Always contact your Alfa Laval representative if you suspect that the largest depth of the corrosion damage exceeds 1,0 mm or if cracks have been found. Do not continue to use the separator until it has been inspected and given clearance for operation by Alfa Laval. Cracks or damage forming a line should be considered as being particularly hazardous.

Non-stainless steel and cast iron parts Corrosion (rusting) can occur on unprotected surfaces of non-stainless steel and cast iron. Frame parts can corrode when exposed to an aggressive environment.

72

1 1 1 6 0 2 0 G

Main bowl parts to check for corrosion



Stainless steel Stainless steel parts corrode when in contact with either chlorides or acidic solutions. Acidic solutions cause general corrosion. The chloride corrosion is characterised by local damage such as pitting, grooves or cracks. The risk of chloride corrosion is higher if the surface is: •

Exposed to a stationary solution.

•

In a crevice.

•

Covered by deposits.

•

Exposed to a solution that low pH.

1 1 6 0 2 0 0 S

Example of chloride corrosion in stainless steel

Corrosion damage caused by chlorides on stainless steel begins as small dark spots that can be difficult to detect. 1.

Inspect closely for all types of damage by corrosion and record these observations carefully.

2.

Polish dark-coloured spots and other corrosion marks with a fine grain emery cloth. This may prevent further damage.

WARNING

1 1 5 0 2 0 0 S

Polish corrosion marks to prevent further damage

Disintegration hazard Pits and spots forming a line may indicate cracks beneath the surface. All forms of cracks are a potential danger and are totally unacceptable. Renew the part if corrosion can be suspected of affecting its strength or function.

Other metal parts Separator parts made of materials other than steel, such as brass or other copper alloys, can also be damaged by corrosion when exposed to an aggressive environment. Possible corrosion damage can be in the form of pits and/or cracks.

73


3.3.5

Cracks

Cracks can initiate on the machine after a period of operation and propagate with time. •

Cracks often initiate in an area exposed to high cyclic material stresses. These are called fatigue cracks.

•

Cracks can also initiate due to corrosion in an aggressive environment.

•

Although very unlikely, cracks may also occur due to the low temperature embrittlement of certain materials.

The combination of an aggressive environment and cyclic stresses will speed-up the formation of cracks. Keeping the machine and its parts clean and free from deposits will help to prevent corrosion attacks.

WARNING Disintegration hazard All forms of cracks are potentially dangerous as they reduce the strength and functional ability of components. Always replace a part if cracks are present.

It is particularly important to inspect for cracks in rotating parts and especially the pillars between the sludge ports in the bowl wall. Always contact your Alfa Laval representative if you suspect that the largest depth of the damage exceeds 1,0 mm. Do not continue to use the separator until it has been inspected and cleared for operation by Alfa Laval.

74



3.3.6


Dosing ring

Clean the nozzles (1) with a soft iron wire and polish the surface (2) with steel wool. Inspect the surface (3) in contact with the operating slide. Remove any marks with a whetstone or fine emery cloth (grain size 240).

1 2 0 7 3 5 0 G

1. 2. 3.

3.3.7

Nozzles Surface inside the dosing ring Surface in contact with the operating slide


Erosion can occur when particles suspended in the process liquid flow along or strike against a surface. Erosion can become intensified locally by flows of higher velocity.

WARNING

1 2 2 5 0 2 0 G

Max. permitted erosion

Disintegration hazard Inspect regularly for erosion damage. Inspect frequently if the process liquid is erosive.

Always contact your Alfa Laval representative if the largest depth of any erosion damage exceeds 1,0 mm. Valuable information as to the nature of the damage can be recorded using photographs, plaster impressions or hammered-in lead. Erosion is characterised by: •

Burnished traces on the material.

•

Dents and pits having a granular and shiny surface.

75



Surfaces particularly subjected to erosion are: 1. The outlet paring disc. 2.

The top disc.

3. The pillars between the sludge ports in the bowl wall. 4. The sealing edge of the bowl body for the seal ring in the sliding bowl bottom. 5. The underside of the distributor in the vicinity of the distribution holes and wings. 6. The surface of the sliding bowl bottom that faces the conical part of the distributor. 7. The sealing edge of the sliding bowl bottom. Look carefully for any signs of erosion damage. Erosion damage can deepen rapidly and consequently weaken parts by reducing the thickness of the metal. 1 4 6 8 0 8 0 G

WARNING Surfaces particularly subjected to erosion

Disintegration hazard Erosion damage can weaken parts by reducing the thickness of the metal. Pay special attention to the pillars between the sludge ports in the bowl wall. Renew the part if erosion is suspected of affecting its strength or function.

76



Wear liners in the bowl The wear liners protect both the wall pillars in the bowl body and the sliding bowl bottom. They must be replaced before the liners have been perforated by erosion.

Wear liners in wall pillars When fitting new liners keep in mind that they will be subjected to a very high service stress. Forces up to 10 000 G are not unusual at the bowl periphery. It is essential, therefore, that the liners are being mounted carefully and in full agreement with the following instructions: The wear liners are made of stainless steel according to the adjoining illustration. 1 1 6 7 0 2 0 G

1.

Remove the old liner and place the new liner blank in the wall pillar.

1 1 0 2 3 0 0 S

2.

Fasten the mounting tool between the wall pillars as shown in the illustration. Clamp the wear liner with the tool.

1 1 6 8 9 2 0 G

3.

Tighten the tool nut with a spanner until the liner is firmly pressed to its seat.

1 1 7 8 9 2 0 G

4.

Bend the shank (1) at right angles to the outside of the bowl wall using a drift. 1 2 9 8 9 2 0 G

77



5. Back off the nut of the tool and remove it. 6. Remove the liner and cut the shank so that it ends 0,5-1,5 mm (A) from the bowl wall.

1 2 2 0 7 6 0 G

7. Fit the wear liner in the wall pillar and clamp it with the tool. Knock the shank flat against the wall of the pillar.

1 1 8 1 3 0 0 S

8. Remove the tool and check that the wear liner is well attached and that the shank (1) does not protrude beyond the bowl periphery. Fit the other liners as described above.

1 2 8 8 9 2 0 G

Wear liner in sliding bowl bottom When fitting a new wear liner (4) in the sliding bowl bottom (6), dismantle and assemble as illustrated. The wear liner can preferably be pressed out of the sliding bowl bottom by using two screw drivers or similar. Normally the wear liner will be destroyed when removed. When renewing the wear liner also renew the O-rings (3 and 5). 1 6 6 3 2 9 0 G

1. 2. 3. 4. 5. 6.

78

Screw Fixing ring O-ring Wear liner O-ring Sliding bowl bottom


3.3.8


Guide surfaces

Check surfaces indicated (1 and 2) for burrs or galling. Rectify when necessary. Repair of galling on guide surfaces; see following pages. Before fitting the sliding bowl bottom, clean (do not degrease) the contact surfaces (1). Apply Alfa Laval lubricating paste or Molykote 1000 Paste with a well-cleaned brush on surfaces (1 and 2).

1 8 2 8 7 3 0 G

Sliding bowl bottom

NOTE To avoid the risk of galling, the contact surfaces (1) should be primed with a slide lacquer at every Major Service (MS). The slide-lacquered surfaces will be destroyed if the surfaces are degreased. 1 9 2 8 7 3 0 G

Bowl body

Lubricate the O-ring and the seal ring with silicone grease making sure they are not damaged and lie properly in their grooves. 1 7 2 8 7 3 0 G

Operating slide

1 6 2 8 7 3 0 G

Dosing ring

1 & 2. Lubricated with Molykote 1000 Paste

79



Repair of galling on guide surfaces Galling (friction marks) may appear on guide surfaces in the operating system, the bowl body and the sliding bowl bottom. Surfaces subject to repair are indicated by an arrow. The example below describes the repair of the lower guide surface of the bowl body nave.

1 1 5 5 0 2 0 G

Guide surface in the bowl body

Recommended tools for correction of galling: - Emery cloth, 240 grade. - Small power drill - Degreasing agent. - Fibre brush, ∅ 25mm. - Fibre brush, ∅ 50 mm. - Very fine single-cut file.

1. Clean the surface thoroughly with a degreasing agent, i.e. white spirit. This is important.

1 1 6 5 0 2 0 G

2. If the galling is excessive, first use the fine single-cut file. The file should be used with caution so that the damage is not made worse. Remove the high spots on the surface. Do not use rotating files or similar. Remove the high spots only - not the undamaged material. 1 1 7 5 0 2 0 G

80


3.


An emery cloth of 240 grade should be used to smooth the edges and to remove any burnt-in foreign matter.

1 1 8 5 0 2 0 G

4.

Finish off by polishing the damaged spot with the fibre brushes and brush wax. It is recommended that the whole area where galling may occur is polished. Polishing will help smooth the whole of the damaged area, even in the deepest parts.

Prime the repaired area with slide lacquer. Read the correct procedure under checkpoint ‘‘3.6.2 Lock ring; priming” on page 122. Apply Alfa Laval lubricating paste or Molykote 1000 Paste to the surface after priming.

3.3.9

1 1 9 5 0 2 0

G

Inlet pipe threads and paring disc

Damage to the inlet pipe threads may cause the paring disc to scrape against the paring chamber cover even if the height has been adjusted correctly. Screw the inlet pipe into the paring disc and check that the inlet pipe turns easily.

81



3.3.10 Lock ring; wear and damage Excessive wear or impact marks on threads, guide and contact surfaces of the lock ring, bowl hood and bowl body may cause hazardous galling. Check the thread condition by tightening the lock ring (1) after removing the disc stack and bowl hood O-ring (2) from the bowl.

WARNING Disintegration hazards Wear on large lock ring thread must not exceed safety limit. The φ-mark on lock ring must not pass opposite φ-mark by more than the specified distance.

1 1 2 5 3 5 0 G

1. 2.

Lock ring O-ring for the bowl hood

In a new bowl the alignment marks on the lock ring and the bowl body are exactly opposite each other. If thread wear is observed, mark the lock ring at the new position opposite the alignment mark on the bowl body by punching in a new mark.

A

If the original φ−mark on the lock ring passes the φ−mark on the bowl body by more than 25° (which corresponds to A=123 mm), an Alfa Laval representative must be contacted immediately. If the marks become illegible, an Alfa Laval representative should be contacted immediately to inspect thread wear and for determining the position of new alignment marks.

82

(MAX 25 ) The φ-mark on the lock ring must not pass the φ-mark on the bowl body by more than 25°

1 3 1 8 7 5 0 G



Damage The position of the threads, contact and guide surfaces are indicated by arrows in the illustration. Clean the threads, contact and guide surfaces with a suitable degreasing agent. Check for burrs and protrusions caused by impact. Watch your fingers for sharp edges. If damage is established, rectify using a whetstone or fine emery cloth (recommended grain size 240). If the damage is considerable, use a fine singlecut file, followed by a whetstone.

1 2 2 7 3 5 0 G

Clean and check thread, contact and guide surfaces of the lock ring

3.3.11 Operating mechanism Dirt and lime deposits in the operating mechanism may cause poor discharge function or no function at all. Clean and polish surfaces with steel wool if necessary.

Reasons for dirt or deposits: •

Hard or unclean operating water. Change water supply or install a water softener or a fine filter.

•

Sludge has been sucked down into bowl casing and into the operating system. Check the installation and the venting system of both the sludge tank and bowl casing drain.

1 1 1 7 4 5 0 G

1. 2. 3. 4. 5.

Bowl body Valve plug Operating slide Nozzles Dosing ring

83



3.3.12 Operating slide Poor sealing between the valve plugs on the operating slide and bowl body may prevent complete closing of the bowl. Examine the sealing surfaces (1) of the bowl body in contact with the valve plugs. Remove any marks and lime deposits with a very fine grain emery cloth. Check the guiding surface (2) in contact with the dosing ring. Remove any marks with a whetstone (grain size 240). 1 1 8 6 3 5 0 G

1. 2.

Bowl body sealing surfaces in contact with the valve plugs Operating slide guide surface in contact with the dosing ring

Remove all the valve plugs. Tap in the new plugs. Correct height of plugs: 14,5 mm.

1 1 9 6 3 5 0 G

Tap in new valve plugs

3.3.13 Springs for operating mechanism Defective or broken springs may prevent complete closing of the bowl. Renew those springs which differ from other springs in regard to length or are defective in other respects.

1 1 1 6 3 5 0 G

Check for defective or broken springs

84



3.3.14 Sliding bowl bottom Poor sealing between the bowl hood seal ring and the sealing edge of the wear liner fitted in the sliding bowl bottom will cause a leakage of process liquid from the bowl. Check the sealing edge of the wear liner. If damaged either through corrosion or erosion, replace the liner as described in ‘‘3.3.7 Erosion and wear liners” on page 75. If the seal ring for the sliding bowl bottom is to be renewed, turn the sliding bowl bottom upside down and inject compressed air through the hole on the underside. This will press the ring outwards far enough to be gripped easily.

WARNING Risk for eye injury Wear safety goggles.

1 1 5 7 0 2 0 G

Removal of the seal ring in sliding bowl bottom using compressed air

3.3.15 Worm wheel and worm; wear of teeth As described in ‘‘2.4.1 Worm wheel and worm; wear of teeth” on page 30 in this chapter.

85



3.3.16 Speed sensor •

Check that the electrical connections are not damaged.

•

Check that the distance (A) between the sensor and the rotating coupling disc is 2 +0,5 mm, see the illustration.

•

Check that the sensor and its bracket are well attached. The tightening torque of the nuts fixing the sensor in the bracket is 50 Nm.

For technical reference, see chapter Speed sensor in the Installation Manual.

1 1 4 8 7 7 0 G

Measurement of the air gap (A) between sensor and coupling disc

3.3.17 Vibration sensor •


•

Check that the sensor is well attached to the frame. If the sensor has to be tightened, see below.

•

For function check of the sensor and the belonging monitoring equipment, see separate instruction manual.

If the sensor, for any reason, has to be replaced, fit it in the following way: 1. Check that the contact surfaces on the sensor and separator frame are clean. 2. Mount the screw in the frame, if removed, and secure with Loctite 242. 3. Mount the vibration sensor. Adjust with washer(s) in order to get the cable downwards. Tightening torque: 35 Nm. For technical reference, see chapter Vibration sensor in the Installation Manual .

86

1 1 3 8 7 7 0 G

Vibration sensor



3.3.18 Cover interlocking switch (option) 3.3.19

Limits switch

•


•

Check that the screws fixing the switch to the frame are tightened.

•

When the button is pushed, check that the brown and blue wires are short-circuited and the two black wires are open circuit.

A

Check also the reverse when the button not pressed.

B

See the illustration for exact measurement when the button is operated. A.

B. C. D.

Cable: – Colour: Grey – Leads area: 0,75 mm 2 – Material: PVC Switching points Contact closed Contact open

C D 1 7 4 6 3 6 0 G

Wire colour codes: BK

Black

BN

Brown

GN-YE

Green-Yellow

Measurements for operation range of the cover interlocking switch button

For technical reference, see chapter Cover interlocking switch (option) in the Installation Manual.

87

3.4 Intermediate Service (IS), assembly

3.4

Intermediate Service (IS), assembly

3.4.1

Introduction

Before starting the assembly first carry out the Intermediate Service check points starting on page 70.

NOTE Renew all parts included in the IS-kit. the Orings and other seal rings should be lubricated with grease of silicone type.

3.4.2

Lubrication

NOTE The separator are designed for use in food application and requires lubricants in food areas that are approved for this application.

Lubricate the O-rings, rectangular rings, threads and guide surfaces before assembly, see ‘‘2.5.4 Recommended lubricants” on page 38.

88



3.4.3



An exploded view of the operating liquid device can be found on page 66. ✔

Check point ‘‘3.3.11 Operating mechanism” on page 83

1.

Fit the operating liquid pipes into the distributing cover.

2.

Put the distributing cover with liquid pipes in place.

1 1 1 8 8 5 0 G

3. Fasten the distributing cover.

1 1 3 9 8 5 0 G

4.

Connect the operating liquid hoses (1) onto the pipes.

1 6 2 1 8 6 0 G

89



5. Assemble the paring disc device. Do not forget the gasket on its underside.

1 1 9 1 0 6 0 G

6. Align the three holes (1) in the control paring disc with the three holes (2) in the distributing cover.

1 2 4 9 8 5 0 G

7. Fit the paring disc device in its place.

1 1 0 8 8 5 0 G

90


8.


Tighten the screws of the control paring disc.

1 2 7 1 3 1 0 G

91



Alfa Laval ref. 541423, rev. 1

9. Check the height position of the operating device relative to the bowl spindle in the following way: •

Use two steel rules or a depth gauge for measuring.

•

Measure the distance (A) according to the illustration.The distance (A) should be 210 ±0,5 mm.

1 2 2 9 0 8 0 G

Measurement of height position of operating paring disc 1. Height adjusting ring(s)

•

The height position is adjusted by adding or by removing height adjusting rings (1) under the distributing cover.

•

After adjustment rotate the spindle. If a scraping noise is heard, re-adjust.

•

The operating liquid device should be assembled and fitted.

•

92

After adjustment rotate the spindle. If a scraping noise occurs, re-adjust.

1 2 7 1 8 5 0 G

The height position can be adjusted with height adjusting rings (1)


3.4.4 ✔



Check point ‘‘3.3.3 Bowl spindle cone and bowl body nave” on page 71 ‘‘3.3.4 Corrosion” on page 72 ‘‘3.3.5 Cracks” on page 74 ‘‘3.3.7 Erosion and wear liners” on page 75 ‘‘3.3.6 Dosing ring” on page 75 ‘‘3.3.8 Guide surfaces” on page 79 ‘‘3.3.11 Operating mechanism” on page 83 ‘‘3.3.12 Operating slide” on page 84 ‘‘3.3.14 Sliding bowl bottom” on page 85 ‘‘3.3.13 Springs for operating mechanism” on page 84

An exploded view of the Bowl body and operating mechanism can be found on page 62. 1.

Except lubrication of the parts mentioned in chapter ‘‘3.3.8 Guide surfaces” on page 79, also lubricate the guide pin fitted in the bottom of the bowl body with Molykote 1000 Paste.

2.

Fasten the insert ring if it has been removed. Tighten the screws crosswise and firmly.

1 1 9 0 1 8 0 G

3.

Lubricate the guide surfaces of the operating slide and O-ring with lubricating paste. Fit the O-ring to operating slide. Fit the operating slide onto the bowl body. Check that the guide pin in the bowl body enters the hole in the operating slide. 1 1 8 0 1 8 0 G

93



4. Lubricate the guide surfaces of the dosing ring with lubricating paste. 5. Fit O-ring to the bowl body at the location of the dosing ring. 6. Lift dosing ring in place. Note! Aligned by uneven hole spacing. The three digits on the ring should line up with corresponding ones on the operating slide.

1 1 7 0 1 8 0 G

Tighten the dosing ring screws first diametrically, then symmetrically around the bowl. Tightening torque: 20 Nm If torque is too low, there is a risk that the bolts will loosen by themselves when the separator is in operation. If torque is too high, the dosing ring as well as the bolts will be deformed. This may lead to sticking of the operating slide which moves inside the dosing ring. 7. Wipe off the spindle top and nave bore in the bowl body. Lubricate the tapered end of the spindle and wipe it off with a clean cloth.

1 1 6 2 2 5 0

G

8. Turn the bowl body using a hoist to its up-right position with a strap threaded through two sludge ports. Fit O-ring to the bowl body nave.

WARNING Crush hazards Support bowl body when turning to prevent it from rolling.

9. Lubricate the guide surfaces and threads of bowl body. See chapter ‘‘3.3.8 Guide surfaces” on page 79 and

94

1 2 8 5 1 6 0 G



10. Fit the lifting tool into the bowl body bottom with the three screws. Turn the handle at the top of the lifting tool so that the central screw is home. 11. Lower the bowl body using hoist until the central screw rests on the spindle top. Then screw up the central screw so that the bowl body sinks down onto the spindle. Remove the tool. 1 2 4 0 1 8 0 G

12. Rotate the bowl body and align it so that the three screw holes in the bowl body bottom are exactly above the three holes in the distributing ring. Tighten the three screws firmly.

1 1 2 0 1 8 0

G

13. Lubricate the guide surfaces of the bowl body and sliding bowl bottom with lubricating paste.

1 1 1 0 1 8 0 G

14. If wear liner has been removed fit O-rings under the wear liner fixing ring. Fit the rectangular ring to the sliding bowl bottom. 15. Fit the lifting tool to the sliding bowl bottom and lift it into the bowl body using a hoist. 16. Fit the distributing cone onto the sliding bowl bottom. Make sure that it fits in the guiding lugs in bowl body.

1 1 0 0 1 8 0 G

95



17. Lubricate the cap nut threads. Fit the packing. 18. Screw on the cap nut counter-clockwise and tighten firmly. Left-hand threads! 1 1 6 7 0 8 0 G

3.4.5


Check point

✔

‘‘3.3.4 Corrosion” on page 72 ‘‘3.3.7 Erosion and wear liners” on page 75 ‘‘3.3.5 Cracks” on page 74 ‘‘3.3.2 Bowl hood seal ring” on page 70 ‘‘3.3.10 Lock ring; wear and damage” on page 82 ‘‘3.6.2 Lock ring; priming” on page 122 A complete exploded view of the bowl hood and disc stack can be found on page 56 1. Assemble the discs one by one on the distributor, start with the bottom bowl disc (19) which has caulks also on its underside. The distributor has one guide rib for the correct positioning of the discs.

CAUTION Cut hazard Sharp edges on the separator discs may cause cuts.

For correct number of discs above and below the wing insert when the machine was new, see the Spare Parts Catalogue . The number of bowl discs above the wing insert may be increased to adjust the disc stack pressure.

96

1 1 1 3 0 6 0 G



1 A 6 3 2 9 0 G

16. Bowl discs (thinner caulks)

A.


17. Bowl discs

B.


18. Wing insert

C.


19. Bottom bowl disc (caulks on both sides)

D.


20. Distributor

E.


F.

Concentrator, Bowl no: 558927-06, -07, -13, -14

H.

Concentrator, Bowl no: 558927-16

Bowl A, D and E

Bowl C

−

Start with the bottom disc (19) which has caulks on both sides.

−


−

Continue with the discs that have thicker caulks than the six upper discs (17).

−

Continue with 68 discs (17).

−

Fit the wing insert (18).

Complete the disc assembly with the six upper discs (16).

−

Fit the other 87 discs.

−

Complete the disc stack assembly by fitting the six upper discs (16).

−

Bowl B

Bowl F and H

−


−


−

Continue with 68 discs (17).

−

Continue with the other discs (17).

−

Fit the wing insert (18).

−

Complete the disc stack assembly with the other 87 discs (17).

97



2. Fit the lifting tool to the distributor and lift the distributor with disc stack into the bowl with a hoist. The φ-mark on the bowl body must be between the two drill marks in the top of the distributor. Make sure that the distributor has entered its position on the distributor cone.

CAUTION Cut hazard Sharp edges on separator discs may cause cuts.

1 2 1 7 9 4 0 G

1 1 3 0 9 0 0 S

3. Fit the top disc onto the distributor. Align the drill mark on its upper side between the two drill marks on the distributor ribs. 4. Fit the lifting tool to the bowl hood and lift it with a hoist. Check that the O-ring and the seal ring of the bowl hood are properly fitted and lubricated. Lower the bowl hood, check that the guide recess on the bowl hood enters the guide lug on the bowl body. Be careful not to scratch the bowl hood seal ring. Do not remove the tool yet. 5. Lubricate the lock ring threads, contact and guide surfaces with lubricating paste. 6. Check that the guide recess on the bowl hood enters the guide lug in the bowl body.

1 3 0 7 9 4 0

G

1 2 6 5 3 5 0 G

98



7. Remove the lifting tool. 8.

Lubricate the lock ring threads, contact and guide surfaces with lubricating paste.

1 2 7 4 4 5 0 G

9.

Fit two eye bolts and lift the lock ring with a hoist onto the bowl body.

1 1 2 8 7 0 0

S

1 2 5 1 3 5 0 G

10. Tighten the lock ring by hand.

11. Apply the brake.

1 2 1 0 2 5 0 G

99



12. Compress Compress the the disc disc stack stack a. Fit (1) the liftin lifting g tool tool on on the the bowl bowl hood hood.. b. Fit the compre compressi ssing ng tool tool on on the the lifti lifting ng tool. tool. Use the lever arm to screw (2) the threaded pillar of the tool into the distributor. The switch on the compressing tool should be in position 0. c.

Turn the the swit switch ch (3) (3) to to posit position ion 1 for for compression.

d. Compres Compress s the the disc disc stack stack by pum pumping ping (4) with the lever arm. The compressing tool is hydraulic and is fitted with a relief valve. valve.

1 1 9 1 8 5 0 G

13. Tighten the the lock ring ring using the spanner spanner for for lock ring. Left-hand threads!

1 1 3 2 8 5 0 G

14. Tighten until until the assemb assembly ly marks are are at least least in line.

NOTE

A

The assembly marks must never pass each other more than 25° which corresponds to A=123 mm. mm.

NOTE Ensure that the disc stack pressure is sufficient to maintain bowl balance. Insufficient pressure in the disc d isc stack can cause vibration and reduce life of ball ba ll bearings.

100

(MAX 25 )

1 3 1 8 7 5 0 G



15. Check Check the disc-s disc-stack tack pressure pressure

NOTE Ensure that the disc stack pressure is sufficient to maintain bowl balance. Insufficient pressure in the disc d isc stack can cause vibration and reduce lifetime of ball bearings.

•

The lock ring (1) should press the bowl hood (2) firmly against the bowl body (3). The hood h ood in turn should exert a pressure on the disc stack (4), clamping it in place.

1 1 4 4 4 5 0 G

1. 2. 3. 4.

•

Lock ring Bowl hood Bowl body Disc stack

Correct pressure is obtained when it is possible to tighten the lock ring so far by hand that the φ-mark on the lock ring is positioned 60° - 90° before the mark on the bowl b owl body. body. To achieve this, add an appropriate appropr iate number of discs to the top of the disc stack beneath the top disc. If the φ-marks do not reach or pass each other, the reason could be an incorrectly assembled bowl or too many discs in the disc stack. Reassemble and check.

1 1 8 5 3 1 0 G

φ-marks on bowl body and lock ring in line

16. Release Release the pressure pressure in the compressi compressing ng tool by turning the switch to position 0 and then remove the compressing and lifting tools. 17. Remove Remove the compressing compressing tool, tool, lifting tool tool for bowl hood and spanner for lock ring.

101



18. Fit −

O-rings

−

paring chamber bottom part

−

gravity disc

−

paring disc top and bottom part

−

paring chamber top part

1 3 8 7 0 8 0 G

19. Fit and tighten tighten the the small small lock lock ring. Left-hand threads!

1 2 4 9 0 8 0 G

1 1 1 3 0 1 0 S

102


3.4. 3.4.6 6


Inlet nlet//out outlet and and fram frame e ho hood

The figures in brackets refer refer to the exploded view on page 51 51..

In case of major service (step 1-3) 1. Fit the O-ring O-ring to to the the frame frame top part and lift lift on the frame ring.

1 1 3 7 0 8 0 G

2. Tighten Tighten the hoo hook k scre screws ws hold holding ing the frame frame ring. Proceed in the following way: way: • Thread the screw (4) into the lower clamp piece (1). • Mount the clamp assembly (1,2,3 and 4) on the frame, and hand tighten the screw (3) so that the two clamping parts (1 and 2) are in contact with the frame hood (5) and the frame casing (6). • Set the screw (4) so that the surfaces (A) on the frame hood and (B) on the frame casing are parallel. • Torque screw (3) to 80 Nm. 1 3 1 7 0 8 0 G

3. Fit Fit the the O-rin O-ring g on top top of of the the fram frame e ring ring..

103



4. Lift Lift on the frame frame hood hood with with lifti lifting ng stra straps ps attached to the handles.

1 2 0 7 0 8 0 G

5. Tighten Tighten the hook screws screws holding holding the frame frame hood.

1 2 9 6 0 8 0 G

104


6.


Check the height position of the paring disc.

Alfa Laval ref. 537756, rev. 0

•

Measure the distance (A) according to the illustration. The distance should be 5±0,5 mm.

•

Adjust the distance by adding or removing height adjusting rings (1).

With inlet and outlet parts mounted: •

Revolve the worm wheel shaft by hand. If it turns heavily or if a scraping noise is heard, wrong height adjustment or wrong fitting of the inlet pipe may be the cause.

1 3 0 9 0 8 0 G

Measurement of height position (A) of parting disc 1.Height adjusting ring(s)

7.

Fit the discharge housing. Fit and tighten the nuts.

1 2 5 7 0 8 0 G

105



8. Fit the O-ring to the inlet pipe. 9. Fit the inlet pipe to the paring disc.

1 2 2 6 0 8 0 G

10. Tighten the inlet pipe. Left-hand thread! 11. Fit the rectangular rings for the inlet and outlet hose.

1 1 8 2 7 0 0 S

1 2 1 6 0 8 0 G

12. Connect the in- and outlet pipes. Tighten the coupling nuts.

1 2 0 6 0 8 0 G

106


3.5

Major Service (MS), dismantling

3.5.1

Introduction

3.5 Major Service (MS), dismantling

When carry out a Major Service an Intermediate Service is always included. By that reason it is assumed that the dismantling for Intermediate Service, starting on page 51 is already done.

107




1 1 6 8 8 7 0 G

108


1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. 31. 32. 33. 34. 35. 36. 37. 38. 39. 40. 41. 42. 43. 44. 45. 46.


Screw Protecting plate O-ring Protecting collar Screw Guard Nut Cover for spring housing Gasket Oil fan O-ring Stud bolt Buffer Spring Screw plug Bowl spindle Lock ring Ball bearing Spring support Spring Spring support Spacing sleeve Ball bearing Ball bearing housing Buffer Split pin Wear ring Spring Spring support Spring casing Gasket Round nut Lock washer Ball bearing Spring Spacing sleeve Ball bearing Worm Conveyor Ball bearing Washer Lock washer Round nut O-ring Bottom bearing housing Screw

109



1. Drain off the oil from the gear housing.

CAUTION Burn hazards Lubricating oil and various machine surfaces can be hot and cause burns.

1 2 9 5 3 0 0

G

2. Remove the cover before starting any dismantling.

1 1 9 7 2 1 0 G

3. On the horizontal driving device, loosen the screws in the clamping element uniformly and in the order shown in the figure. In the first round, do not loosen them more than 1/4 turn to avoid wryness in the clamping rings. Do not unscrew the screws entirely.

CAUTION Crush hazard The worm wheel is quite heavy. Hold it firmly when dismantling. Risk for jamming injury.

1 1 9 7 0 2 0 G

110



4. Push the worm wheel with the clamping element aside.

5.

1 1 4 7 8 1 0 G

Remove the hood above the top bearing.

6. Remove the protecting plate.

1 1 8 2 8 4 0 G

7. Remove the O-ring. Remove the throw-off collar with the special tool.

1 1 9 2 8 4 0 G

111



8. Remove the protecting hood and the O-ring.

1 1 0 3 8 4 0 G

9. Loosen the screw plugs half-a-turn using the screw spanner and a hammer.

1 2 1 3 8 4 0 G

10. Unscrew the six nuts and remove the spring housing cover and packing.

1 1 2 3 8 4 0 G

112



11. Unscrew the oil fan clockwise . Left-hand thread!

1 1 3 9 9 4 0 G

12. Loosen the lock ring half-a-turn counter- clockwise.

1 1 4 9 9 4 0 G

13. Fit the lifting eye bolt. Lift out the spindle unit carefully and place it horizontally.

1 1 3 3 8 4 0 G

113



14. Use some pieces of wood for support.

1 1 4 3 8 4 0 G

15. Remove the packing and if necessary, the stud bolts.

1 1 5 3 8 4 0 G

16. Make a wooden support to be used during certain sub-operations. Open the lock washer and remove the nut using the hook key.

1 1 0 9 9 4 0

G

17. Pull off the complete worm including spring and ball bearings with a puller. The ball bearing and conveyor will also become loose.

1 1 6 3 8 4 0 G

114



18. Remove plugs, springs and buffers. Pull out the spindle unit with ball bearing housing from the spring holder.

1 1 7 3 8 4 0 G

19. Remove the lock ring and replace it with the puller tool

1 1 8 3 8 4 0 G

20. Remove the ball bearing housing with bearings using the puller.

1 1 1 3 8 0 0 S

1 1 0 4 0 5 0 G

115



21. Push out ball bearing, sleeve, springs, spring holder, spacing sleeve and ball bearing.

1 1 9 3 8 4 0 G

22. Remove the axial buffer.

1 1 4 6 8 4 0 G

116



23. Dismantle the complete worm by opening the lock washer and remove the nut and washer. Knock loose and remove the bearings, spring and spacing sleeve from the worm by using the special driving off tool.

1 3 1 4 8 4 0 G

1 2 1 4 8 4 0 G

117


3.5.2



1 6 5 6 4 2 0 G

Worm gear end 1. 2. 3. 4. 5.

Round nut Frame bottom part Bearing housing Round nut Large ball bearing

6. 7. 8. 9. 10.

Lock ring Worm wheel Clamp element Small ball bearing Tolerance ring

11. 12. 13. 14.

Gasket Worm wheel shaft Bearing shield Screw

Drive motor end 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11.

118

Screw Stop screw Brake pulley Elastic plate Screw Spring washer Washer Coupling disc Screw Spring washer Motor adapter

1 2 2 8 7 7 0 G



24. Remove the bearing shield: ease it off by means of two of the fastening bolts.

CAUTION Crush hazard The shield is quite heavy. Hold the shield firmly or use two longer screws without heads as guide pins to prevent dropping it during dismantling. These screws are included in the tool kit. 1 5 4 2 1 2 0 G 1 1 7 9 0 0 S

25. Fit the puller tool and pull off the ball bearing from the worm wheel shaft.

1 1 9 2 9 0 0 S

1 3 5 2 1 2 0 G

26. Disconnect the motor cables. Note the positions of cables in the terminal box to reconnect correctly (for correct direction of rotation). 27. Remove the motor and the three elastic plates. Use a hoist. 28. If the brake pulley has to be dismantled, use the tool illustrated below together with a washer to protect the threaded hole in the motor shaft.

1 1 6 7 7 7 0 G

Fit the tool in the three holes (A).

1 2 2 2 9 0 0

S

119



29. To remove the coupling disc, unscrew the centre screw and remove the plain washer. Then tighten the screw again to protect the worm wheel shaft during next operation. 30. Fit the puller tool illustrated below and pull off the coupling disc. 1 1 7 7 7 7 0 G

1 1 9 2 9 0 0 S

31. Remove the lock ring on the worm wheel side. Left-hand thread!

1 1 3 2 9 1 0 G

32. Knock loose the worm wheel shaft by means of a piece of wood and a tin hammer. Use light blows from the motor side.

1 1 4 3 1 2 0 G

33. Unscrew the round nut fixing the ball bearing. The nut is locked with Loctite 242.

1 1 6 2 1 2 0 G

120



34. Remove the ball bearing. Put some cotton twist into the tool to avoid damage to the shaft. The pressure should be applied to the inner race of the ball bearing.

1 1 7 2 1 2 0 G

121

3.6 Major Service (MS), checkpoints

3.6

Major Service (MS), checkpoints

3.6.1

Introduction


This chapter consists of checkpoints that can be done when the separator has been dismantled for Major Service but before it is assembled. Other checkpoints that can be done only in the conjunction with the assembly are described in the assembly sections.

NOTE At Major Service the check points for Intermediate Service starting on page 70 should also be carried out in conjunction with the checkpoints in this chapter.

3.6.2

Lock ring; priming

The arrows indicate positions of threads, guide and contact surfaces to be primed. Recommended agents for priming procedure: •

Degreasing agent

•

Slide lacquer Molykote D321 R (varnish or spray)

•

Small power drill

•

2 fibre brushes

1 1 7 4 4 5 0 G

Threads, guide and contact surfaces to be primed

122



This instruction describes how to treat with Molykote spray D321R.

1. Clean the lock ring thoroughly with a degreasing agent and wipe it off.

1 1 9 6 0 2 0 G

2.

Spray the threads, guide and contact surfaces with slide lacquer Molykote 321 R. Let the lacquer air-cure for about 15 minutes.

1 1 0 7 0 2 0 G

3.

Use a fibre brush to polish the slide lacquer into the surface. The black spray will look like well-polished leather when properly finished.

1 1 3 7 0 2 0 G

123



4. Spray the lock ring a second time and let it dry for about 15 minutes.

1 1 2 7 0 2 0 G

5. Polish the slide lacquer to a black shiny surface which will now last about a year. Proceed in the same way with the threads of the bowl body and with the guide surfaces of the bowl hood and bowl body.

CAUTION Inhalation hazard 1 1 3 7 0 2 0 G

When handling friction blocks/pads use a dust mask to make sure not to inhale any dust. Do not use compressed air for removal of any dust. Remove dust by vacuum or wet cloth. See Safety instructions for environmental issues regarding correct disposal of used friction blocks/pads.

3.6.3

Brake

A worn or oily friction pad will lengthen the braking period. If the friction pad is worn: •

Remove the screws and exchange the friction pad.

NOTE The screws are slotted in both ends.

1 1 1 4 3 1 0 G

Friction pad is fastened with screws

124



If the friction pad is oily: •

Clean the friction pad and the coupling drum with a suitable degreasing agent.

•

Roughen the friction surface of the friction pad with a coarse file.

NOTE Identify the cause of oily friction pad. If oil is leaking from the gear housing, renew the sealing ring between the two parts.

1 1 2 4 3 1 0 G

Actions to be taken when the brake friction pad is oily

Checking of spring and brake shoe: Formation of rust on brake parts may cause the brake to jam. •

Remove any rust from the surface (1) of the brake shoe and the corresponding guide surface in the cap (2).

•

Rub in Molykote Paste on the surfaces.

•

Replace the spring (3) if it has been weak. This is indicated by chattering from the spring when the brake is in released position.

•

1 1 3 4 3 1 0 G

Oil the spring when assembling.

CAUTION

1. 2. 3.

Contact surface on the brake shoe for the spring Guide surface in the cap for the brake shoe Spring

Inhalation hazard When handling friction blocks/pads use a dust mask to make sure not to inhale any dust. Do not use compressed air for removal of any dust. Remove dust by vacuum or wet cloth. See Safety instructions for environmental issues regarding correct disposal of used friction blocks/pads.

125


3.6.4


Buffer springs and ball bearing housing

Weakened or broken buffer springs or defective contact surfaces for the buffers on the ball bearing housing may give rise to separator vibration (rough bowl run).

1 2 4 3 8 2 0 G

Top bearing springs

Cut view of ball bearing housing

In case of spring fracture, the complete set of springs should be replaced, even if only one spring is broken.

Ball bearing housing

1 2 5 3 8 2 0 G

Examine the contact surface for the buffers on the ball bearing housing. In case of defects (indentations deeper than A=0,5 mm), renew the housing as well as buffers and springs.

1 4 6 3 8 2 0 G

Max. permitted indentations (A) made by radial buffers

126


3.7

Major Service (MS), assembly

3.7.1

Introduction

3.7 Major Service (MS), assembly

Before starting the assembly first carry out the Intermediate service checkpoints starting on page 70 and Major Service checkpoints starting on page 122. When mounting ball bearings on the spindle as described below, the bearings must be heated in oil to max. 125 °C.


NOTE If any doubt how to mount roller bearings in a correct way, see the detailed description in chapter ‘‘2.7.1 Ball and roller bearings” on page 41.

NOTE Since roller bearings are normally treated only with rust protection oil from the factory, an initial lubrication of new bearings must always be performed whenever bearings are replaced. The initial lubrication implies adding a few drops of lube oil to the bearings. Use the same oil type as in the separator worm gear housing.

127



NOTE Renew all O-rings and other parts included in the MS-kit. Lubricate the O-rings with grease of silicone type.

3.7.2


An exploded view of the horizontal driving device can be found on page 118.

NOTE Renew all parts included in the MS-kit.

1. Clean and oil the seat of the large ball bearing on the worm wheel shaft. 2. Fit the large ball bearing. If necessary, knock the ball bearing into its seat with the driving-on sleeve tool and the ring. When mounting the ball bearing on the worm wheel shaft, the bearing must be heated in oil to max. 125 °C.



128

1 1 4 2 9 1 0 G


3.


Apply some Loctite 242 on the threads of the round nut. Lock the ball baring in its position by tightening the nut.

1 1 6 1 9 1 0 G

4.

Clean the ball bearing housing in the frame and oil the outer race of the ball bearing. Force the worm wheel shaft into its position in the frame so that the ball bearing enters correctly into its seat. Use the driving-on sleeve and the ring forcing the outer race of the ball bearing.

1 1 5 3 1 2 0

G

5.

Fit the lock ring. Tighten it with the pin spanner. Left-hand thread!

1 1 0 6 4 2 0 G

6.

Fit the coupling disc. Check that the key in the worm wheel shaft enters into the recess in the nave of the disc.

7.

Lock the coupling disc in its position by means of the plain washer, spring washer and centre screw. 1 1 7 7 7 7 0 G

129



8. If the brake pulley has been removed, first lubricate the motor shaft with Molykote Paste 1000. Then knock the disc on to the motor shaft as far as possible using a piece of wood and a hammer. Screw the tool illustrated into the motor shaft as far it goes and apply some grease to its washer. Then turn the tool until the coupling disc is in position. Lock with the lock screw.

1 1 9 5 8 4 0 G

9. Check the three elastic plates. Clean or renew, if needed. 10. Fit the electric motor, using a hoist.

1 2 6 7 7 7 0 G

Check the axial play between two of the flexible plates. Correct measure (A) is 4 +2 mm. The measure can be adjusted by moving the pulley (1) axially on the motor shaft.

1 2 8 3 3 6 0

G

Where to measure the axial play (A) in the rigid coupling

130



11. Worm wheel assembly: If the rubber buffers (1) have been replaced in the worm wheel, apply some Loctite 270 on the six screws (A). Then tighten crosswise with 25 Nm.

1 2 9 1 9 1 0 G

12. Clean the worm wheel shaft and the inner surface of the worm wheel nave thoroughly with a clean cloth. Carefully push the worm wheel into its position on the shaft. 13. Clean the inner surface of the clamping element and oil it. The oil must be of the same quality as is used in the gear housing. Slip the clamping element onto the worm wheel. The tightening is described later in this assembly instruction.

1 1 8 3 1 2 0 G

14. Mount the ball bearing (not heated) on the free end of the shaft. Apply the mounting tool and hit a few blows on the latter to ascertain that the bearing is in the correct position.

15. Clean the bearing seat in the bearing shield. Check that the tolerance ring is position (renewed at Major Service).

1 1 6 5 8 4 0 G

16. Renew the gasket and fit the bearing shield. Note that the shield can be fitted in one position only. If necessary, pull it into position using the screws or tap its centre with the tin hammer.

1 4 7 5 8 4 0 G

131



CAUTION Crush hazard The shield is quite heavy. Hold the shield firmly or use two longer screws without heads as guide pins to prevent dropping it during assembly. These screws are included in the tool kit.

1 1 7 9 0 0 S

17. Check the radial wobble of the Worm wheel shaft by first clamping a dial indicator in a magnetic support and fasten it to the surface for the worm wheel guard. Turn the worm wheel shaft by hand. Permissible radial wobble is maximum 0,10 mm. If the wobble is greater, the worm wheel shaft must be removed from the frame for closer examination. Get in touch with your Alfa Laval representative as the worm wheel shaft may need to be renewed.

NOTE Excessive wobble on the worm wheel shaft may cause vibration and noise.

1 3 1 6 4 2 0 G

Measurement of the radial wobble

132


3.7.3 ✔



Check point ‘‘3.3.15 Worm wheel and worm; wear of teeth” on page 85

1.

Wipe off and oil the bearing seat before fitting the ball bearing.

1 1 0 9 8 1 0 G

2.

Fit the ball bearing, spacing sleeve, spring holder, springs, spring holder and ball bearing in the ball bearing housing.

1 1 1 6 8 4 0 G

Note! The deep groove ball bearing (A) is to be mounted in the upper housing and the angular ball bearing (B) in the lower one. Note! Turn the angular ball bearing (B) the right way - IMPORTANT! The wider shoulder of the inner race must face upwards. 1 1 0 6 8 4 0

G

133



3. Heat the complete unit to 125 °C.


4. Fit the unit on the spindle while still hot. Lock with the oil fan. Left-hand thread!

1 1 3 6 8 4 0 G

5. Fit the axial buffer in the spring housing. It is recommended to support the spring housing so the spindle is free below.

1 1 4 6 8 4 0

G

134


6.


Place the spindle unit in the spring housing.

1 1 5 6 8 4 0 G

7.

Fit buffers, springs and screw plugs.

1 1 6 6 8 4 0 G

135



8. Heat ball bearings (3) and (6) to 125 °C. Fit the ball bearing (6), spacing sleeve (5), spring (4), ball bearing (3), lock washer (2), and round nut (1) onto worm and lock with washer.

1 3 7 6 8 4 0

G

9. Fit the worm with spring component to the spring housing.

1 1 8 6 8 4 0 G

10. Fit the conveyor with the drill marks facing the threads of the spindle.

1 1 9 6 8 4 0 G

11. Heat the ball bearing to 125 °C and fit it to the spindle.

1 3 0 7 8 4 0 G

136



12. Fit the intermediate washer, the lock washer, the round nut and lock the washer.

1 1 1 7 8 4 0

G

13. Fit a new packing and O-ring. If the stud bolts have been removed, refit them and lock with Loctite 270.

1 1 1 8 0 5 0 G

14. Fit the lifting eye on the spindle top. Carefully lower the spindle into the frame. Guide the bottom bearing into the bottom sleeve. If it does not completely enter its seat, tap the spindle top gently with a tin hammer.

1 1 3 7 8 4 0 G

15. Fit the packing and spring housing cover. Secure the spindle unit in the frame with the nuts. Lock them with Loctite 242.

1 1 2 3 8 4 0 G

137



16. Knock down the spindle with a few taps on the spindle top with the tin hammer. Tighten the screw plugs. Rotate the spindle a few turns to make sure that there is no obstruction.

1 2 1 3 8 4 0 G

17. Fit O-ring and protecting hood.

1 1 0 3 8 4 0 G

18. Fit the throw-off collar. Left-hand thread! Fit the O-ring and protecting plate. Rotate the spindle again to make sure that there is no obstruction.

1 1 7 7 8 4 0 G

138



19. Fit the hood above the top bearing and rotate the spindle once more to check for clearance. 20. Rotate the spindle by rotating the coupling drum by hand and check for smooth run. No scraping or other jarring sounds must be heard.

1 1 9 1 8 6 0 G

21. Check the radial wobble of the bowl spindle.

NOTE Spindle wobble will cause rough bowl running. This leads to vibration and reduces lifetime of ball bearings.

•

Fit a dial indicator in a support and fasten it to the frame.

1 2 5 1 9 1 0 G

Measurement of the radial wobble

•

Use the coupling drum to revolve the spindle manually.

•

Measure the wobble at the top of the tapered end of the spindle. Permissible radial wobble is maximum 0,04 mm.

•

If wobble is too large, renew all the ball bearings on the spindle.

•

Measure wobble after assembly. If it is still excessive, the spindle is probably damaged and must be renewed.

1 1 9 1 8 6 0 G

139



22. Fit the oil drain plug and pour oil into worm gear housing. The oil level should be slightly above middle of the sight glass. Oil volume: approx. 8,5 litres Suitable oil brands can be found in ‘‘2.5.3 Recommended oil brands” on page 37. 23. Fit the worm gear cover and its gasket covering the worm gear housing. Also fit the coupling cover (with the brake) if removed.

WARNING Disintegration hazards When power cables have been connected, always check direction of rotation. The direction of the motor fan must correspond to the arrow on the plate fixed on the motor flange. If incorrect, vital rotating parts could unscrew causing disintegration of the machine.

140

1 3 8 5 8 4 0 G

2 8 8 6 0 0 S

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144

Index

A Assembly General directions Inlet/outlet anf frame hood Tools (special) Vertical driving device

49 103 50 127

B Bearings Maintenance directions Replacement on horizontal driving device Bowl Dismantling Bowl body and operating mechanism Dismantling Bowl discs Cleaning Disc stack pressure Bowl spindle Assembly Check point 71 Dismantling Radial wobble Brake Renewing of friction pad

,

43 118 56 62 29 101 127 139 108 139 124

C Check points Ball and roller bearings Before shutdowns Bowl hood seal ring Brake Buffer springs and ball bearing housing Cleaning agents Cleaning of bowl discs Corrosion Coupling, axial play Cover interlocking switch (option) Cracks Dosing ring Erosion External cleaning Guide surfaces Lock ring - priming Oil change procedure Operating mechanism Operating slide

43 47 70 124 126 27 29 72 130 87 74 75 75 28 79 122 33 83 84

Repair of galling Sliding bowl bottom Speed sensor Springs for operating mechanism Vibration analysis Vibration sensor Wear liners Worm wheel and worm - wear of teeth Cleaning Bowl discs Cleaning agents External cleaning Corrosion Coupling Axial play Cover interlocking switch (option) Check point Cracks

80 85 86 84 42 86 75 30 29 27 28 72 130 87 74

D Daily checks Dismantling Bowl body and operating mechanism Bowl hood and disc stack General directions Tools Vertical driving device Dismantling.Vertical driving device

21 62 56 49 50 108 110

E Erosion Exploded views Bowl body and operating mechanism Bowl hood and disc stack Horizontal driving device Operating water device

75 62 56 118 66

F Frame feet Replacement

26

G Gear Wear of teeth Guide surfaces Intermediate Service Repair of galling

30 79 80

145

Service and Maintenance Manual AFPX 513

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