Operations Manual tracks.pdf

     

Do not attempt to operate these crawler track systems unless you have read and understood these instructions.

TECHNICAL TECHNICAL MANUAL MANUAL

Contents Contents

CONTENTS SECTION 1: GENERAL GENERAL INFORMATION

1.1 MANUFACTURER’S STATEMENT

-1-

1.2 INTRODUCTION

-2-

1.3 UNDERCARRIAGE IDENTIFICATION

-3-

1.4 GENERAL SAFETY AND ACCIDENT PREVENTION 1.4.1 Protective Equipment 1.4.2 Unauthorised Unauthorised Modifications 1.4.3 Pressurised Items 1.4.4 Lifting

-4-

1.5 DAILY SAFETY CHECKS

-5-

1.6 OPERATING PRECAUTIONS

-6-

1.7 WORKING CONDITIONS SECTION SECTION 2: HYDRAULIC HYDRAULIC INSTAL INSTALLA LATION TION

2.1 HYDRAULIC CONNECTIONS TO TRACK DRIVES FITTED WITH A2FE FIXED DISPLACEMENT TRACK DRIVE MOTORS 2.1.1 Connections to the Track Drive Motors 2.1.2 Port Functions 2.1.3 Port Sizes for A2FE Fixed Displacement Hydraulic Motors 2.1.4 Direction of Rotation

-7-

-8-

2.2 HYDRAULIC SCHEMATIC FOR A2FE FIXED DISPLACEMENT MOTORS

-9-

2.3 OPERATING LIMITS FOR A2FE FIXED DISPLACEMENT MOTORS 2.3.1 Operating Pressure Range 2.3.2 Case drain Pressure 2.3.3 Inlet Flow 2.3.4 Temperature Range

- 10 -

2.4 MOTION CONTROL / BRAKE RELEASE VALVE FOR A2FE FIXED DISPLACEMENT MOTORS 2.4.1 Function 2.4.2 Connections to the Track Drives when Fitted with Motion Control / Brake Release/Valves 2.4.3 Motion Control / Brake Release Valve Port Sizes 2.4.4 Direction of Rotation

- 11 -

2.5 HYDRAULIC SCHEMATIC FOR TRACK DRIVES FITTED WITH MOTION CONTROL / BRAKE RELEASE VALVES

- 13 -

Copyright © Strickland Strickl and Tracks Ltd Nov-2004, Cropthorne, Pershore, Worcs. WR10 3NE.

Tel +44 (0)1386 862800 Fax: +44 (0)1386 862801

E-mail: [email protected] stricklanduk.com


Contents Contents

CONTENTS SECTION 1: GENERAL GENERAL INFORMATION

1.1 MANUFACTURER’S STATEMENT

-1-

1.2 INTRODUCTION

-2-

1.3 UNDERCARRIAGE IDENTIFICATION

-3-

1.4 GENERAL SAFETY AND ACCIDENT PREVENTION 1.4.1 Protective Equipment 1.4.2 Unauthorised Unauthorised Modifications 1.4.3 Pressurised Items 1.4.4 Lifting

-4-

1.5 DAILY SAFETY CHECKS

-5-

1.6 OPERATING PRECAUTIONS

-6-

1.7 WORKING CONDITIONS SECTION SECTION 2: HYDRAULIC HYDRAULIC INSTAL INSTALLA LATION TION

2.1 HYDRAULIC CONNECTIONS TO TRACK DRIVES FITTED WITH A2FE FIXED DISPLACEMENT TRACK DRIVE MOTORS 2.1.1 Connections to the Track Drive Motors 2.1.2 Port Functions 2.1.3 Port Sizes for A2FE Fixed Displacement Hydraulic Motors 2.1.4 Direction of Rotation

-7-

-8-

2.2 HYDRAULIC SCHEMATIC FOR A2FE FIXED DISPLACEMENT MOTORS

-9-

2.3 OPERATING LIMITS FOR A2FE FIXED DISPLACEMENT MOTORS 2.3.1 Operating Pressure Range 2.3.2 Case drain Pressure 2.3.3 Inlet Flow 2.3.4 Temperature Range

- 10 -

2.4 MOTION CONTROL / BRAKE RELEASE VALVE FOR A2FE FIXED DISPLACEMENT MOTORS 2.4.1 Function 2.4.2 Connections to the Track Drives when Fitted with Motion Control / Brake Release/Valves 2.4.3 Motion Control / Brake Release Valve Port Sizes 2.4.4 Direction of Rotation

- 11 -

2.5 HYDRAULIC SCHEMATIC FOR TRACK DRIVES FITTED WITH MOTION CONTROL / BRAKE RELEASE VALVES

- 13 -


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Contents Contents

SECTION SECTION 2: HYDRAULIC HYDRAULIC INSTAL INSTALLA LATION TION (Continued)

2.6 HYDRAULIC CONNECTIONS TO TRACK DRIVES WITH A10VT DUAL DISPLACEMENT MOTORS 2.6.1 Basic Connections to the Motors 2.6.2 Port Functions 2.6.3 Port Sizes for Dual Displacement A10VT Motors 2.6.4 2 Speed Operation 2.6.5 Single Speed Operation 2.6.6 Direction of Rotation 2.7 HYDRAULIC SCHEMATIC FOR A10VT DUAL DISPLACEMENT MOTORS 2.7.1 Brake Release Function 2.7.2 Motion Control Valve 2.7.3 Pressure Relief Valve 2.8 OPERATING LIMITS FOR A10VT DUEL DISPLACEMENT MOTORS 2.8.1 Operating Pressure Range 2.8.2 Case Drain Pressure 2.8.3 Displacement Displacement Change Pressure Range 2.8.4 Inlet Flow 2.8.5 Temperature Range

- 14 -

- 17 -

- 18 -

SECTION 3: BASIC BA SIC MAINTENANCE

3.1 CORRECT MAINTENANCE PROCEDURE

- 19 -

3.2 CHECKING TRACK TENSION

- 20 -

3.3 ADJUSTMENT OF TRACK TENSION TENSION 3.3.1 Tightening the Track 3.3.2 Slackening the Track

- 21 -

3.4 REMOVING THE TRACK

- 23 -

3.5 REJOINING THE TRACK

- 24 -

3.6 FITTING OF REPAIR LINK

- 25 -

3.7 TRACK DRIVE UNITS 3.7.1 Routine Checks 3.7.2 Oil Filling 3.7.3 Oil Draining

- 26 -


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Contents Contents

SECTION 4: PARTS BREAKDOWN BREAKDOWN

4.0 PARTS BREAKDOWN

- 27 -

4.1 FINAL DRIVE UNIT

- 27 -

4.2 MOTION CONTROL/ BRAKE RELEASE VALVE, HOSES AND FITTINGS

- 28 -

4.3 DRIVE SPROCKET

- 29 -

4.4 LOWER ROLLER GROUP

- 30 -

4.5 CARRIER ROLLER GROUP

- 30 -

4.6 IDLER, RECOIL AND TENSIONER

- 31 -

4.7 TRACK GROUP

- 33 -

4.8 TRACK REPAIR LINK

- 34 -

SECTION 5: WEAR LIMITS LIMITS

5.0 WEAR LIMITS

- 35 -

5.1 TRACK SHOE WEAR

- 35 -

5.2 TRACK LINK WEAR

- 36 -

5.3 INTERNAL PIN AND BUSH WEAR

- 36 -

5.4 EXTERNAL PIN AND BUSH WEAR

- 37 -

5.5 LOWER ROLLER WEAR

- 37 -

5.6 CARRIER ROLLER WEAR

- 38 -

5.7 FRONT IDLER WEAR

- 38 -

5.8 SPROCKET WEAR

- 39 -

SECTION 6: TROUBL TROUBLESHOO ESHOOTING TING

6.1 TRACK TENSION

- 40 -

6.2 LOSS OF DRIVE

- 41 -

6.3 LEAKS AND SEIZURES 6.3.1 General Components 6.3.2 Track Chains

- 42 -

SECTION 7: APPENDIX

7.1 BOLT TORQUE TABLE


- 43 -

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SECTION 1: GENERAL INFORMATION

TECHNICAL MANUAL

General Information

1.1 MANUFACTURER’S STATEMENT Relevant to the incorporation of track systems into host machines. The tracked undercarriage system is designed as a modular unit for integration to a host machine. It is not intended to be cycled, driven or operated in the free standing condition. will Strickland Tracks Ltd

not be held responsible for the attachment method to the host machine and or any failures of the crawler track system relating to these procedures unless approved in writing by Strickland Tracks Ltd . Modification or abuse of the original design may negate manufacturer’s warranty or guarantee which could conflict with health and safety standards and should not be undertaken without prior consultation with the manufacturer. For full warranty cover, any modification or attachment must be approved in writing by Strickland Tracks Ltd . This installation, operation and maintenance manual must be issued to the machine user, Strickland Tracks Ltd will not be held responsible for any misuse or failure due to lack of maintenance of the track system in accordance with instructions in this manual. Failure to issue this manual to the machine user will invalidate the track systems warranty. Help line is available Monday to Friday, 9am to 5pm, for procedures relating to; attachment, safety, operating or maintenance. Warranty procedure Any defect in a Strickland Tracks crawler undercarriage must be reported promptly to Strickland Tracks. Strickland Tracks will then repair or replace the part or unit of the crawler undercarriage if it is proven to be defective. No work is to be carried out or replacement parts to be fitted to a crawler undercarriage without our prior authorisation. We will not be responsible for the cost or consequences of any work being carried out or replacement parts being fitted to a Strickland crawler undercarriage without prior authorisation. Non Strickland parts will invalidate the warranty. No claims of whatever nature for work carried out to a Strickland crawler undercarriage in the warranty period will be entertained unless we have given our prior authorisation in writing for work or replacements to be fitted. If the warranty claim can not be dealt with via telephone or written communication, Strickland Tracks may investigate a site visit at their sole and absolute discretion. - Page 1-

Copyright © Strickland Tracks Ltd Nov-2004,Cropthorne, Pershore,Worcs. WR10 3NE.

Tel +44 (0)1386 862800

Fax:+44 (0)1386 862801

E-mail: [email protected]

TECHNICAL MANUAL

General Information

1.2 INTRODUCTION •

The purpose of this spare parts, operating and service manual is to permit customers to properly employ the crawler track system undercarriage on the machines they intend to install it to.

•

Read this manual with care before conducting any maintenance work on undercarriage supplied by Strickland Tracks Ltd .

•

Continuous improvements to undercarriages produced by Strickland Tracks , may result in some of the illustrations in this manual being slightly different Ltd from the actual parts used.

•

It is necessary when requesting any spare parts, that all serial numbers relating to the undercarriage are quoted.

•

For full technical support contact our Head Office at: Strickland Tracks Li mited

Bay 2 / Unit 5 The Heath Works Main Road Cropthorne, Pershore Worcestershire WR10 3NE ENGLAND Tel No: +44 (0)1386 862800 Fax No: +44 (0)1386 862801 E-mail: [email protected] Website: www.stricklandtracks.com

- Page 2-


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TECHNICAL MANUAL

General Information

1.3 UNDERCARRIAGE IDENTIFICATION All track systems manufactured by Strickland Tracks Ltd can be identified through a 6 digit serial number. This serial number is recorded along with other information on the Identification Plate as shown below:-

This identification plate is located on the outside face of each left and right hand track frame fabrications, forward from the drive end of the tracks. The serial number is also stamped into the skid plate of each track frame in case the Identification Plate is lost or damaged. On older track systems where there is no Identification Plate fitted, the serial number can still be found stamped in the skid plate. Serial Number Stam ed Here

Identification Plate Fitted Here

- Page 3-


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TECHNICAL MANUAL

General Information

1.4 GENERAL SAFETY AND ACCIDENT PREVENTION Please ensure all safety precautions and instructions are adhered to when installing, operating and/or performing maintenance on the track systems. 1.4.1 Protective Equipment Always wear protective clothing and footwear as required by job conditions when working around this product. Wear protective glasses when in risk of splintering debris. Use welders gloves, facial/eye protection and other protective clothing appropriate to welding job being performed. Avoid loose clothing. 1.4.2 Unauthorised Modifications It is important not to carry out modifications to the track system which could compromise proper operation and safety. Strickland Tracks Ltd are not responsible for any injury or damage caused by unauthorised modifications. 1.4.3 Pressurised Items Avoid welding near pressurised hydraulic pipelines, track tensioners, track recoils or other flammable materials. Excessive heating near to pressurised hydraulic pipelines can cause failure, generating a flammable spray with the possibility of severe injuries to nearby persons. 1.4.4 Lifting Use a hoist when lifting components weighing more than 23 Kg (50lbs). Ensure all hooks, chains, slings etc., are in good condition and tested to an adequate safe working load, and be sure hooks or slings are positioned correctly.

- Page 4-


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TECHNICAL MANUAL

General Information

1.5 DAILY SAFETY CHECKS The following checks should be made every day before operation. •

Check for loose bolts and nuts on lower rollers, sprockets and track shoes.

•

Check all track links to ensure master pins are correctly located and tight

•

Check for oil leaks from lower rollers and front idlers.

•

Check for oil leaks from track drive gearbox and motor.

•

Check track tension is within given limits (see Section 3.2).

•

Check for tight or seized track joints (refer to section 1.7)

•

Check for general damage and wear to all components.

Take corrective action immediately; tighten bolts and nuts to correct torque, replace damaged or worn components. DO NOT operate the machine with damaged or defective track system components. Any persistent problem should be reported to the machine manufacturer.

- Page 5-


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TECHNICAL MANUAL

General Information

1.6 OPERATING PRECAUTIONS When travelling up a gradient, the tracks should be driven forward (i.e. idlers first, drive sprocket to the rear). When travelling down a gradient, tracks should be driven sprocket first.

ALWAYS: • Park the machine on flat, level ground. If it is necessary to park the machine on a gradient, the tracks should be solidly blocked. • Ensure the terrain the machine is working on is firm enough to adequately support the machine. • Make certain the machine is tracked at least 10m in either direction on a daily basis, to minimise risk of track chain seizure. • Ensure the track systems are free from debris before moving the machine. • Make certain the tracks are not frozen to the ground before moving the machine. NEVER:• Attempt to track the machine if there is any build up of material around the tracks and drive sprockets. • Attempt to track the machine if the tracks are frozen to the ground. • Push or tow the machine when unable to free itself.

1.7 WORKING CONDITIONS If your machine will be working in materials which cause corrosion to carbon steel, you must replace standard tracks with lubricated tracks to avoid seizure of the track joints. Lubricated tracks are available as an optional extra from new or as a retrofit for customers entering adverse working conditions. The operating temperature range for track systems should be between, -10°C to +40°C. Always consult Strickland Tracks Ltd when temperatures exceed above or below this working range, as alternate component specifications will be required.

Failure to observe the above precautions cou ld result in danger to persons and damage to the track sy stems and may also invalidate the warranty. - Page 6-


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SECTION 2: HYDRAULIC INSTALLATION

TECHNICAL MANUAL

Hydraulic Installation

Important Note: Hydraulic filtration and cleanliness Before connecting track drives to any hydraulic circuit, ensure all pipes are removed and flushed through with the hydraulic system prior to connection. To ensure proper function of the hydraulic motor, the filtration of the pressure fluid must provide a cleanliness level of at least: 20/18/15 according to ISO 4406.

2.1

HYDRAULIC CONNECTIONS TO A2FE FIXED DISPLACEMENT TRACK DRIVE MOTORS

2.1.1 Connections to the Track Drive Motors There are four connections to the A2FE fixed displacement hydraulic motors, required for normal operation; the 2 main flow ports (A and B), the brake release port (F) and the case drain port (T), the positions of which are shown below: Brake Release Port, F Main Flow Ports, A,B

Case Drain Port, T

2.1.2 Port Functio ns Main Flow Ports, A, B - Flow and pressure of hydraulic oil is applied to these ports, main drive is achieved. Torque and speed output is dependant on the pressure and flow applied. Case Drain Port, T

- Allows any excess hydraulic oil to return to tank.

Brake Release Port, F - With a pressure of between 12 and 50 bar applied to this port, multi disc parking brake is released, allowing rotation of the track drive. When no pressure is applied, the parking brake is locked on.

Under no circumstances should it be attempted to drive the tracks without releasing the parking brake. This can cause failure of the track dr ive and will invalidate the warranty. - Page 7 -

Copyright © Strickland Tracks Ltd Nov-2004, Cropthorne, Pershore, Worcs. WR10 3NE.

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TECHNICAL MANUAL


2.1.3 Port Sizes for A2FE Fixed Displacement Hydrauli c Motors The sizes of the main flow ports and the case drain port are dependant on the motor size. These port sizes for the various motors are given below: Motor Type A2FE28/32 A2FE45/56/63

Motor Displacement 28 / 32cc

A,B

Drain, T

½” SAE

M16 x 1.5 x 12 deep

45 / 56 / 63cc

¾” SAE

M18 x 1.5 x 12 deep

A2FE80/90

80 / 90cc

1” SAE

M18 x 1.5 x 12 deep

A2FE107/125 A2FE160/180

107 / 125cc

1 ¼” SAE

M22 x 1.5 x 12 deep

160 / 180cc

1 ¼” SAE

M22 x 1.5 x 12 deep

The brake release port size is dependant on the type of gearbox fitted: - Bosch Rexroth / Lohmann + Stolterfoht Drives - Brake release port, F - Bonfiglioli Trasmital Drives - Brake release port, F

- M12 - ¼” G

2.1.4 Direction of Rotation When connecting to the track drives, it is important to check that the direction of rotation corresponds to forward movement of the machine when positioned at the rear of the machine.

The diagram above shows the direction of rotation of the track drive in relation to the input flow to the motor.

- Page 8 -


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TECHNICAL MANUAL

2.2


HYDRAULIC SCHEMATIC FOR A2FE FIXED DISPLACEMENT MOTORS

Below is a general hydraulic circuit for the track drive gearbox and fixed displacement motor combination, with no motion control and brake release valve fitted.

F

B

A

T

Directional Control Valve from Machine

- Page 9 -


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TECHNICAL MANUAL

2.3


OPERATING LIMITS FOR A2FE FIXED DISPLACEMENT MOTORS

2.3.1 Operating Pressur e Range Pressure at ports A or B: Nominal Pressure Peak Pressure

= 350 bar = 400 bar

2.3.2 Case Drain Pressur e Maximum permissible pressure at port T: Max. Pressure

= 5 bar

2.3.3 Inlet Flow Maximum inlet flow through ports A or B: Max. Flow

= 175 l/min

2.3.4 Temperatur e Range Operating range of hydraulic oil temperatures: Min. Temperature Max. Temperature

= -25°C = 115°C

- Page 10 -


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TECHNICAL MANUAL

2.4


MOTION CONTROL / BRAKE RELEASE VALVE FOR A2FE FIXED DISPLACEMENT MOTORS Important Note; These valves are designed for use on an open loop hydraulic circuit only.

2.4.1 Function This valve is supplied fitted and hosed to the hydraulic motor flange as shown in the illustrations below.

The valve has two main functions:

-

-

To take a feed from the main pressure line to pressurize the brake release port with a controlled pressure, releasing the multi disc parking brake whenever any flow/pressure is applied to the hydraulic motors, prior to driving the gearbox. To prevent overrun of the motor as the machine descends any gradient, avoiding over-speeding and therefore from a run-away condition. This motion control function operates in both directions of rotation.

2.4.2 Connections to the Track Drives when Fitted with Motion Control / Brake Release Valves Three connections are necessary to operate the track drives when supplied fitted and hosed with the motion control and brake release valve for normal operation. These are the main flow ports (A and B) and the case drain port (T): Main Flow Ports, A,B

Case Drain Port, T

- Page 11 -


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TECHNICAL MANUAL


2.4.3 Motion Control / Brake Release Valve Port Sizes The sizes of the main flow ports and the case drain port when the hydraulic motors are fitted with the motion control / brake release valves are as follows: A,B

Drain, T

A2FE28/32

Motor Displacement 28 / 32cc

½” BSPP

5/8” BSPP

A2FE45/56/63 A2FE80/90

45 / 56 / 63cc 80 / 90cc

¾” BSPP ¾” BSPP

5/8” BSPP 5/8” BSPP

A2FE107/125/160

107 / 125 / 160cc

1” BSPP

5/8” BSPP

Motor Type

2.4.4 Direction of Rotation When connecting to the track drives, it is important to check that the direction of rotation corresponds to forward movement of the machine, when the drives are positioned at the rear of the machine.

The diagram above shows the direction of rotation of the track drive in relation to the input flow to the motor / valve.

- Page 12 -


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TECHNICAL MANUAL


2.5 HYDRAULIC SCHEMATIC FOR TRACK DRIVES FITTED WITH

MOTION CONTROL / BRAKE RELEASE VALVES Below is a general hydraulic circuit for the track drive gearbox and fixed displacement motor combination, with a motion control and brake release valve fitted.

F

B

A

T V2

V1

Directional Control Valve from Machine

- Page 13 -


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TECHNICAL MANUAL


2.6 HYDRAULIC CONNECTIONS TO TRACK DRIVES WITH A10VT DUAL

DISPLACEMENT MOTORS Important Note; The A10VT track drive motors are designed for use on an open loop hydraulic circuit only. 2.6.1 Basic Connectio ns to the Track Motors There are 4 connections to the standard track drives fitted with A10VT type hydraulic motors, required for normal operation. These are the 2 main flow ports (A and B), the case drain port (T) and the motor displacement change port (X), the positions of which are shown below. The 2 measuring ports are not required for normal operation. Measurin Ports, MA, MB

Case Drain Port, T

Dis lacement Chan e Port, X

Main Flow Ports, A,B

Dis lacement Chan e Port, X

Main Flow Port, A

Measuring Ports, MA, MB

Case Drain Port, T Main Flow Port, B

- Page 14 -


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TECHNICAL MANUAL


2.6.2 Port Functions Main Flow Ports, A, B - Flow and pressure of hydraulic oil is applied to these ports, main drive is achieved. Torque and speed output is dependant on the pressure and flow applied. Case Drain Port, T

- Allows any excess hydraulic oil to return to tank.

Displ. Change Port, X - Pilot pressure port for controlling the displacement change of the motor between maximum and minimum, with a relative affect on the output speed of the final drive. Measuring Ports, MA, MB

- Used to measure running pressures if required. Blanked off during normal operation.

Important Note; Drain line connected to port T, must be installed in such a manner that the motor housing cannot empty when standing still. 2.6.3 Port Sizes for Dual Displacement A10VT Motors The sizes of the main flow ports and the case drain port are dependant on the motor size. These port sizes for the various motors are given below: Motor Type

Motor Displ.

A, B

Drain, T

Switch, X

A10VT28

14.2 / 28cc

¾”

9/16”

9/16”

Measure, MA, MB 7/16”

A10VT45 22.9 / 45cc M27 x 2 M14 x 1.5 M12 x 1.5 M12 x 1.5 Please note; All fittings into the above Motor’s, also require relevant size o’rings. 2.6.4 2 Speed Operation The A10VT type motor has an integral brake release system and does not require a separate connection to perform this function. For 2 speed operation, a pilot pressure line must be connected to the Displacement Change Port, X. With no pressure applied to this port, the motor will run at maximum displacement giving high torque and low speed. With a pressure of between 10 and 100 bar applied to Port X, the displacement is switched from maximum to minimum displacement, giving low torque and high speed. Important Note; Pressure applied to the Displacement Change Port must not exceed 100 bar. - Page 15 -


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TECHNICAL MANUAL


2.6.5 Single Speed Operation The A10VT type motor has an integral brake release system and does not require a separate connection to perform this function. For operation as a single speed unit, i.e. when the low torque, high speed setting is not required, the Displacement Change Port, X, must be connected via a ‘T’ fitting, to the Case Drain line (from Port T). This connection is shown below.

2.6.6 Direction of Rotation When connecting to the track drives, it is important to check that the direction of rotation corresponds to forward movement of the machine when positioned at the rear of the machine.

The diagram above shows the direction of rotation of the track drive in relation to the input flow to the motor. - Page 16 -


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TECHNICAL MANUAL


2.7 HYDRAULIC SCHEMATIC FOR A10VT DUAL DISPLACEMENT MOTORS Below is a general hydraulic circuit for the track drive gearbox fitted with the A10VT type dual displacement (2 speed) motor, with integrated valves for motion control, crossover pressure relief and brake release functions.

2.7.1 Brake Release Funct ion An integrated switching valve leads system pressure from A or B to a pressure reducing valve, limiting maximum brake release pressure to 30 bar. This feed controls the release of the multi disc parking brake whenever any flow/pressure is applied to the hydraulic motor, prior to driving the gearbox. 2.7.2 Motion Contr ol Valve To prevent overrun of the motor as the machine descends any gradient, avoiding over-speeding and therefore from a run-away condition. This motion control function operates in both directions of rotation. 2.7.3 Pressur e Relief Valve These valves limit the maximum pressure preventing damage to the motor. Both directions of rotation have a relief valve, each valve opening to the opposite side of the motor (cross over valves). Dampening of this valve action causes a soft operation avoiding jerky machine movements. - Page 17 -


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TECHNICAL MANUAL


2.8 OPERATING LIMITS FOR A10VT DUAL DISPLACEMENT MOTORS 2.8.1 Operating Pressur e Range Pressure at Ports A or B: Nominal Pressure Peak Pressure

= 330 bar = 350 bar

2.8.2 Case Drain Pressur e Maximum permissible pressure at Port T: Max. Pressure

= 2 bar

2.8.3 Displacement Change Pressur e Range Range of pressure required at Port X to initiate displacement switch from maximum to minimum setting: Min. Pressure Max. Pressure

= 10 bar = 100 bar

2.8.4 Inlet Flow Maximum inlet flow through Ports A or B: Max. Flow

= 140 l/min

2.8.5 Temperature Range Operating range of hydraulic oil temperatures: Min. Temperature Max. Temperature

= -25°C = 90°C

- Page 18 -

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SECTION 3: BASIC MAINTENANCE

TECHNICAL MANUAL

Basic Maintenance

3.1 CORRECT MAINTENA NCE PROCEDURE

In order to maintain the reliability of the tracks, regular maintenance is a must. It is imperative that the tracks are maintained as outlined within this maintenance section. ALWAYS: •

perform maintenance on a level and solid surface.

•

ensure the undercarriage is solidly supported if work is necessary under the track systems.

•

remove any build-up of grease, oil or debris.

•

repair all damage and replace worn or broken parts immediately.

•

check for oil leaks and damaged hydraulic hoses.

•

use only specified lubricants, do not mix different brands or types.

•

use great care when maintaining the hydraulic system since oil may be very hot when the machine has just been working.

•

use only Stri ckland Tracks Ltd supplied / approved replacement parts. Use of unapproved parts will invalidate the warranty.

•

dispose of lubricants in the proper manner.

Please note that the maintenance intervals specified are for normal working conditions. If the track system is used in severe working conditions then maintenance and safety checks must be performed more frequently.

- Page 19-


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TECHNICAL MANUAL

Basic Maintenance

3.2 CHECKING TRACK TENSION Stop your machine on solid and level ground and drive 2 metres (minimum) in a forward direction. Measure the sag on the top part of the track on the longest section of unsupported track as shown below.

Carrier Roller or Skid Plate whichever is fitted

The sag of the track must be between 5mm and 15mm. The above conditions must be fulfilled on a new machine. This must also be periodically checked and corrected if necessary by adjusting the valve fitted to the end of the grease tensioner, as described in Section 3.3. Whilst checking the track for tension, the track should also be checked for seized joints. If the joints are found to be tight or seized, you must replace standard tracks with lubricated tracks to avoid seizure of the track joints. Lubricated tracks are available as an optional extra from new or as a retrofit for customers entering adverse working conditions. Failure to change the track which has seized links will have adverse effects on other undercarriage components, which will invalidate the warranty of the track system.

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TECHNICAL MANUAL

Basic Maintenance

3.3 ADJUSTMENT OF TRACK TENSION Crawler track systems use a grease cylinder to keep each track chain in tension. Screwed into the end of the grease cylinder is a grease fitting, enabling grease to be pumped into the grease chamber and released from it, tightening and slackening the track.

The grease contained in the track tensioner is pressurised so care must be taken when loosening the grease fitting.

3.3.1 Tightenin g the Track 1. Loosen the two screws and swing access cover away from access aperture on the side of the track frame. 2. Ensure the grease fitting and grease gun adaptor are clean, ingress of dirt into the grease fitting can result in failure. Connect a grease gun to the grease fitting and add grease until the track tension is within the specified values given in Section 3.2. 3. Drive 50 metres forwards and 50 metres backwards and repeat the above procedure if the track slackens. - Page 21-


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TECHNICAL MANUAL

Basic Maintenance

3.3.2 Slackening the Track 1. Loosen the two screws and swing access cover away from access aperture on the side of the track frame. 2. Loosen the grease fitting, by turning in an anti-clockwise direction, using gradual increments until the grease begins to be expelled. Care must be taken not to loosen the grease fitting too quickly. 3. When the correct track tension has been obtained, tighten the grease fitting by turning in a clockwise direction and clean away all trace of extruded grease. Be sure not to over tighten the grease fitting. If the track fails to slacken after grease fitting has been loosened; DO NOT attempt to remove the tracks or disassemble the track tensioner, and DO NOT remove the grease fitting from the tensioner. It is possible that running the tracks a short distance in both directions with the grease fitting loosened may help to expel the grease.

The above procedure invol ves working with grease contained at high pressure and must only be carried out by qualified fitters.

IF IN DOUBT, PLEASE CONTACT HELPLINE +44 (0)1386 862800.

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TECHNICAL MANUAL

Basic Maintenance

3.4 REMOVING THE TRACK To uncouple the track group the following procedure must be followed: 1. Jack up the machine and block safely on firm, level ground. 2. Locate the master pin. This can be identified by small circular indentations, or by an X marked on each of the end faces. 3. Rotate the track until the pin is in approximate position (as shown below) and place a block under the front of track. This prevents the chain from dropping once the master pin has been removed.

4. Release the tension on the tracks as described in Section 3.3, this should only be carried out by a qualified fitter. 5. The master pin can now be pressed out from the chain, separating the track. 6. The track can now be pulled from under the machine.

When removing the master pin, do not use a sledge hammer. This may cause splintering of t he metal with the possibi lity of personal injury.

Care must be taken when pull ing the track chain from und er the machine to avoid dislodgin g the blocks or stands supporting the machine. IF IN DOUBT, PLEASE CONTACT HELPLINE +44 (0)1386 862800. - Page 23-


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TECHNICAL MANUAL

Basic Maintenance

3.5 REJOINING THE TRACK To rejoin the track group, the following procedure must be followed, but should only be carried out by qualified fitters: 1. Position the pin collars into the counter bore of the mating links. 2. Ensure the pin holes and the bushings are aligned and insert a dummy pin. 3. With the master pin in position, set up the track press. 4. Press the master pin fully into the chain links, pushing the dummy pin through the link.

Sledge hammers must not be used to insert the master pin. This may cause splintering of t he metal with the possibi lity of personal injury. IF IN DOUBT, PLEASE CONTACT HELPLINE +44 (0)1386 862800.

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TECHNICAL MANUAL

Basic Maintenance

3.6 FITTING OF REPAIR LINK A track repair link kit as shown in Section 4.6, consists of:1 no. 1 no. 1 no. 2 no. 4 no. 4 no.

Left hand track link Right hand track link Master bushing Master pin with collars Track shoe bolt Track shoe nut

- the kit is supplied with the master bushing pressed into the left and right hand links. To fit a repair link to a track chain, the following procedure should be followed: 1. Position the pin collars into the counter bore of the open mating links. 2. Insert the bushing end of the repair link into the open end of the track chain. 3. Ensure the pin holes and the bushings are aligned and insert a dummy pin. 4. With the master pin in position, set up the track press. 5. Press the master pin fully into the chain links, pushing the dummy pin through the link. Repeat this procedure for the second join, inserting the dummy pin and pressing in the second master pin, completing the chain.

Sledge hammers must not be used to insert the master pin. This may cause splintering of t he metal with the possibi lity of personal injury. IF IN DOUBT, PLEASE CONTACT HELPLINE +44 (0)1386 862800.

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TECHNICAL MANUAL

Basic Maintenance

3.7 TRACK DRIVE UNITS 3.7.1 Routi ne Checks The first oil replacement for the gearbox is to be carried out after 100 operating hours. There after replace the oil every 1000 hours or at least once each year. The oil level should be checked every 100 working hours or every month – whichever comes first. 3.7.2 Oil Filling To fill, track the machine until the gearbox casing is level with a plug positioned at 12 o’clock as shown below. Unscrew the two plugs and fill from the upper hole until oil reaches the level of the lower hole. Oil fill

Maximum Level

3.7.3 Oil Draining To drain, track the machine until a plug is at 6 o’clock position as shown below. Unscrew both plugs and allow all oil to discharge into a suitable container. Dispose of waste oil in a safe and approved way.

Venting

Drain port

IF IN DOUBT, PLEASE CONTACT HELPLINE +44 (0)1386 862800. - Page 26-


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SECTION 4: PARTS BREAKDOWN

TECHNICAL MANUAL

Parts Breakdown

4.0 PARTS BREAKDOWN Relevant to any track system manufactured by Strickland Tracks Ltd , the following sections below provide illustrations and descriptions for all parts which may be fitted, depending on the particular model / specification of track system supplied. All part numbers relating to the exact specification of track system supplied can be found in Supplement.

4.1 FINAL DRIVE UNIT

Item No.

Description

010

Track Drive Gearbox c/w Hydraulic Motor

020

Hex Head Bolt (Gearbox to Track Frame)

030

Socket Head Capscrew (Gearbox to Track Frame)

040

Fixed Displacement Hydraulic Motor

050

Drive Motor Main ‘O’ Ring

055

¼” Stand Off Pipe

060

Oil Fill / Drain Plug

070

M12 x ¼” M/M Adaptor

080

M12 Bounded Seal

090

Gear Oil SAE 80W/90

It is recommended that the track drive unit and hydraulic mot or are not opened in site conditio ns. - Page 27 -

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Strickland Tracks Ltd, Cropthorne, Pershore, Worcs. WR10 3NE.

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TECHNICAL MANUAL

Parts Breakdown

4.2 MOTION CONTROL/BRAKE RELEASE VALVE, HOSES AND FITTINGS

Item No.

Description

100

Motion Control / Brake Release Valve Block

110

A2FE63 Valve Spacer Plate

120

A2FE125 Valve Spacer Plate

130

A2FE90 Valve Transfer Plate

140

Socket Head Capscrew (Valve Block to Motor Flange)

150

Socket Head Capscrew (Transfer Plate to Motor Flange)

160

Socket Head Capscrew (Valve Block to Transfer Plate)

170

Hose and Fitting Kit

180

Hose Extensions

181

¾” x 45º x ¾” M/F Forged Adaptor

182

¼” x 45º x ¼ ” M/F Adaptor

183

¼” x ¼” x ¼” M/F/M Tee

184

M14 x ¼” M/M Adaptor with O-ring

185

M12 x 3/8” M/M Adaptor

- Page 28 -

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TECHNICAL MANUAL

Parts Breakdown

4.3 DRIVE SPROCKET

Item No.

Description

190

Drive Sprocket

200

Hex Head Bolt (Sprocket to Track Drive)

210

Socket Head Capscrew (Sprocket to Track Drive)

- Page 29 -

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TECHNICAL MANUAL

Parts Breakdown

4.4 LOWER ROLLER GROUP

Item No.

Description

220

Single Flanged Lower Roller

230

Hex Head Bolt (Roller to Track Frame)

240

Hardened Washer

4.5 CARRIER ROLLER GROUP

Item No.

Description

250

Carrier Roller

260

Hex Head Bolt (Roller to Track Frame / Bracket)

270

Hardened Washer

- Page 30 -

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Parts Breakdown

4.6 IDLER, RECOIL AND TENSIONER

ITEM 290 ITEM 280

ITEM 300

ITEM 320

ITEM 330

ITEM 310

ITEM 340

ITEM 350

ITEM 360

Do not attempt to dismantle recoil units. Specialised workshop equipment is necessary.

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Parts Breakdown

4.6 IDLER, RECOIL AND TENSIONER (Continued) Item No.

Description

280

Front Idler Group

290

Idler Yoke

300

Recoil / Tensioner Unit

310

Coil Spring Recoil

320

Grease Tensioner

322

Hex Head Bolt (Tensioner to Track Frame)

324

Spring Washer

330

Tensioner Grease Fitting

340

Gasket for Grease Fitting

350

Grease Gun Adaptor

360

Tensioner Seal Kit

- Page 32 -

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TECHNICAL MANUAL

Parts Breakdown

4.7 TRACK GROUP

ITEM 380

ITEM 390

ITEM 370

Item No.

ITEM 400

Description

370

Track Link Assembly

380

Track Shoe

390

Track Shoe Bolt

400

Track Shoe Nut

410

Master Pin with Collars

Please note; Where lubricated chains are required, please contact Strickland quoting the serial No. of your track system. We will Tracks Ltd provide full parts list of required lubricated track group for the relevant machine.

- Page 33 -

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TECHNICAL MANUAL

Parts Breakdown

4.8 TRACK REPAIR LINK KIT

Item No. 420

Description Track Repair Link Kit :- Consisting of:

430

- 1 no. Left Hand Link

440

- 1 no. Right Hand Link

450

- 1 no. Master Bush

460

- 2 no. Master Pin with Collars

470

- 4 no. Track Shoe Nut

480

- 4 no. Track Shoe Nut

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TECHNICAL MANUAL

Wear Limits

5.0 WEAR LIMITS To ensure the most economical use of the track systems, it is important to determine the appropriate time to replace each of the worn parts. The following section will describe the most accurate methods of measuring the wear of the various undercarriage components. If the wear of these components is monitored and the replacements made, you should ensure the proper functioning of the track system and avoid unnecessary damage and costly renewal expenses. Exact wear limits are dependant on the specific parts fitted to the track system supplied. Please refer to the Parts Supplement relative to the specification of track system supplied to find the required component part numbers.

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Under no circumstances should the machine be operated if the wear of any component is in excess of 100%.

- Page 35 -

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TECHNICAL MANUAL

Wear Limits

5.1 TRACK SHOE WEAR The most important wear of a track shoe is the relative height of the grouser to the top of the shoe plate. A depth gauge should be used to measure this, as shown in the diagram below:-

Grouser Height

Wear Percentage 50% 75% mm

Shoe Part No.

New Shoe mm

25%

TBG 505300-12-3 TBG 505360-12-1 TBG 505400-12-0 TBG 505500-12-7

42.5

41.5

40.5

39.5

38.5

22.0

21.2

20.4

19.6

18.8

25

24.2

23.4

22.6

21.8

25.3

25

24.7

24.4

24.1

26.5

25.9

25.3

24.7

24.1

28

27.3

26.6

25.9

25.2

TBG 510400916-0 TBG 510400916-C TBG 510500916-7 TBG 014400-58-0 TBG 014500-58-0 TBG 014600-58-0 TBG 020400-18-0 TBG 020500-18-0 TBG 020600-18-0 TBG 026500-34-0 TBG 026700-34-0 TBG 532500-20-0

100%

- Page 36 -

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TECHNICAL MANUAL

Wear Limits

5.2 TRACK LINK WEAR To measure the wear use a depth gauge and measure the depth from the bottom of the grouser shoe to the running surface of the track link.

Link Height

Link Part No.

New Link mm

25%


TLS 040LH/RH-5

70

69.75

69.5

69.25

69

TLS 045LH/RH-5

83

82.8

82.6

82.4

82.2

TLS 007LH/RH-58-1 TLS 007LH/RH-58-XHD

96

95.6

95.2

94.8

94.4

TLS 210LH/RH-8

103.2

103

102.8

102.6

102.4

TLS 013LH/RH-8

121.5

121.1

120.7

120.3

119.9

TLS 660LH/RH-0

116

115.6

115.2

114.8

114.4

100%

- Page 37 -

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TECHNICAL MANUAL

Wear Limits

5.3 INTERNAL PIN AND BUSH WEAR To determine the average internal pin and bushing wear measure across 4 sections of track chain comprising of 4 links (5 pins). This track section must not include the master pin, and should be on the upper side of the track. Block the track using a 40mm diameter steel bar in the sprocket, being careful not to foul the track frame or chassis of the machine. Reverse the machine until the track is taut across the top of the track system (maximum 1/8 turn of sprocket). Measurement is made of the elongation of the chain pitch. A standard steel tape can be used. Measure as shown below:

4 Sections of the Link Assembly

Chain Part No.

Wear Percentage

New Chain mm

25%

560.0

560.5

640.0

75%

100%

561.0

561.5

562.0

640.5

641.0

641.5

642.0

685.8

686.2

686.6

687.0

687.4

702.0

702.6

703.2

703.8

704.4

TCA 07152-0

811.6

812.4

813.2

814.0

814.8

TCA 66056-0

760.0

761.0

762.0

763.0

764.0

TCA 04036-2 TCA 04040-1 TCA 04046-9 TCA 04053-2 TCA 04545-1 TCA 04548-5 TCA 04552-0 TCA 07249-A TCA 81149-A TCA 81156-A TCA 81156-XHD TCA 64055-A TCA 64058-A

50% mm

- Page 38 -

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TECHNICAL MANUAL

Wear Limits

5.4 EXTERNAL PIN AND BUSH WEAR Wear of the bushes is caused at the point of contact between the bushing and the sprocket tooth. To measure this wear use a small outside calliper. FORWARD DRIVE SIDE RADIAL WEAR

REVERSE

Outside wear of the bushings can be of any of the 3 types shown above. Measurements should be taken in each position and the area where wear is maximum should be considered. Wear Percentage

New Chain mm

25%

TCA 04036-2 TCA 04040-1 TCA 04046-9 TCA 04053-2

37.0

36.9

TCA 04545-1 TCA 04548-0 TCA 04552-0

45

TCA 07249-A

Chain Part No.

75%

100%

36.8

36.7

36.6

44.9

44.8

44.7

44.6

50.8

50.6

50.4

50.2

50.0

53.8

53.6

53.4

53.2

53.0

58.738

58.6

58.5

58.4

58.3

TCA 07152-0

66.675

66.6

66.5

66.4

66.3

TCA 66056-0

60.0

59.9

59.8

59.7

59.6

TCA 81149-A TCA 81156-A TCA 81156-XHD TCA 64055-A TCA 64058-A

50% mm

- Page 39 -

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TECHNICAL MANUAL

Wear Limits

5.5 LOWER ROLLER WEAR The tread wear of the roller is the most important wear area and is measured on the roller diameter. The most suitable tool is a large outside calliper.

Rail Diameter The correct measurement is to measure the diameter of both tread surfaces of the roller. Consider the tread with the smallest diameter.

25%


100%

135.0

134.5

134.0

133.5

133.0

LRG 000SF60B-4

160.0

159.5

159.0

158.5

158.0

LRG 000SC40A-A

155.0

154.5

154.0

153.5

153.0

LRG 000SC60A-A

154.0

153.5

153.0

152.5

152.0

LRG 000VA774-0

172.0

171.5

171.0

170.5

170.0

Roller Part No.

New Roller mm

LRG 000SC003-A

- Page 40 -

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TECHNICAL MANUAL

Wear Limits

5.6 CARRIER ROLLER WEAR The tread wear of the roller is the most important wear area and is measured on the roller diameter. The most suitable tool is a large outside calliper.

Rail Diameter The correct measurement is to measure the diameter of both tread surfaces of the roller. Consider the tread with the smallest diameter.

Roller Part No.

New Roller mm

CRG 130-A

140.0

25%


100%

139.5

139.0

138.0

138.5

- Page 41 -

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TECHNICAL MANUAL

Wear Limits

5.7 FRONT IDLER WEAR Radial tread wear is the most important factor. The simplest method of measuring tread wear is to measure the depth of tread from the centre of the idler.

Rail Height


Idler Part No.

New Idler mm

25%

IRT 140-2761-02

16.0

16.2

16.4

16.6

16.8

IDG 5061-5

17.0

17.2

17.4

17.6

17.8

IDG 600-A

17.0

17.25

17.5

17.75

18.0

IDG 502-A

26.0

26.25

26.5

26.75

27.0

IDG 660550-7

20.0

20.25

20.5

20.75

21.0

100%

- Page 42 -

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TECHNICAL MANUAL

Wear Limits

5.8 SPROCKET WEAR Sprocket wear is very difficult to assess accurately. In fact, under normal working conditions, the wear occurs in such a way that no trace of the original toothing remains as a valid reference for measuring the wear. It is therefore impossible to provide 100% accurate data for wear measurement.

Tooth Depth

As an approximate rule, the sprocket should be replaced when wear has reached the limits shown in the above illustration. As the wear is never uniform, it is necessary to consider the point at which the wear is at a maximum.

- Page 43 -

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TECHNICAL MANUAL

Wear Limits

5.8 SPROCKET WEAR (Continued) Wear Percentage 50% 75% mm

Sprocket Part No.

New Teeth mm

25%

SPA 140-02GFT09-21 SPA 140-02BON707-21 SPA 140-02GFT17-21

26.0

26.2

26.4

26.6

26.8

SPA 160-06707-23 SPA 160-06GFT17-23 SPA 160-06GFT24-23 SPA 160-06GFT36-23

33.2

33.4

33.6

33.8

34.0

SPA 171-0709-21-7 SPA 171-07GFT36-21

34.1

34.4

34.7

35.0

35.3

SPA 171-07711-23 SPA 171-07GFT36-23 SPA 171-07GFT50-23/4 SPA 171-07GFT50-23-5

34.1

34.4

34.7

35.0

35.3

SPA 175-9113-23-7 SPA 175-91GFT50-23 SPA 175-91GFT60-23

34.8

34.1

34.4

34.7

35.0

SPA 190-09715-23

42.0

42.2

42.4

42.6

42.8

SPA 203-09715-22 SPA 203-09GFT60-22 SPA 203-09GFT80-22

41.5

41.7

41.9

42.1

42.3

100%

SPA 160-06706-20

- Page 44 -

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SECTION 6: TROUBLESHOOTING

TECHNICAL MANUAL

Troubleshooting

6.1 TRACK TENSION Crawler track systems use a grease cylinder to keep the track chains in tension. Loss of tension in the tracks can result in the sprocket jumping in the track chain, and also allowing the track chain to run off the idler/sprocket. This can hinder the tracking ability of the machine and damage many of the components of the track systems if not resolved quickly. The tension of the tracks should be checked on a regular basis according to the parameters set out in Section 3.2 of this manual; General Maintenance. If the tension of the track is outside these parameters, and the adjustment method given in paragraph 3.3 has no effect, please read below checks that can be made and possible causes: Check 1:

- With the greaser access plate removed (see Section 3.3), make a visual inspection of the greaser, looking for any signs of leaking grease.

Possible Cause:

- If grease is leaking from the base of the greaser, where it screws into the end of the tensioner, either the gasket has failed and needs replacing, or the greaser is not screwed in properly and needs tightening. - If grease is leaking from the end of the greaser where the grease gun connects to it, the greaser valve has failed and should be replaced.

Check 2:

- When the machine is stationary and blocked, make a visual inspection of the track below the adjusting end of the tensioner, looking for any signs of leaking grease. Also, reach under the frame, feeling the adjusting end of the tensioner for any grease.

Possible Cause:

- If grease is leaking from the adjusting end of the cylinder, the seals may have failed. This requires the tensioner to be removed from the tracks frame, to be either fitted with new seals, or replaced with a complete new grease tensioner.

If the above checks are carried out with no signs of any faults, please ring the helpline for further assistance.

IF IN DOUBT, PLEASE CONTACT HELPLINE +44 (0)1386 862800

.

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TECHNICAL MANUAL

Troubleshooting

6.2 LOSS OF DRIVE Crawler track systems are driven using hydraulic motors connected to planetary drive gearboxes. The hydraulic motors are driven using the hydraulics fitted to the machine. Begin by making a visual inspection of the tracks, particularly around the sprocket, idler and bottom rollers where material / objects can sometimes lodge. Follow this by inspecting all hoses and connections, ensuring there are no leaks or blocks. If there are no physical impedances in the tracks and no faults are found with hoses and connectors, please read below checks that can be made and possible causes: Check 1:

- Using pressure / flow testing equipment, measure the values of the flow and pressure being applied to the hydraulic motors.

Possible Cause:

- If the values of the flow and pressure passing to the hydraulic motors is less than that required to drive the tracks (see machine manufacturer’s separate publication), there may be a fault in the machines hydraulic system.

Check 2:

- Test the pressure being applied to the brake release port on the gearbox. In order to release the brake, this should be fed with a pressure of between 12 and 50 bar.

Possible Cause:

- If the pressure is below 12 bar, do not attempt to drive the tracks. With a pressure below 12 bar, the brake will not release when driving the tracks is attempted. This can cause the brakes to seize requiring a replacement unit to be fitted.

Check 3:

- If a valve is fitted to the hydraulic motor flange, ensure there are no visible faults with the valve, and none of the connections are damaged / leaking.

Possible Cause:

- If there are no visual faults with the valve, and all other checks identify any faults, the valve block may need replacing.

If the above checks are carried out with no signs of any faults, please ring the helpline for further assistance.

IF IN DOUBT, PLEASE CONTACT HELPLINE +44 (0)1386 862800. - Page 46-

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TECHNICAL MANUAL

Troubleshooting

6.3 LEAKS AND SEIZURES 6.3.1 General Components Many components fitted to crawler track systems such as rollers and idlers are lubricated with oil. Regular checks should be made to ensure these components are not leaking and rotate freely when the tracks are driven. Any items such as rollers which show signs of leaking, or fail to rotate when the tracks are driven should be replaced immediately. 6.3.2 Track Chains It is important to be aware of the type of conditions in which the tracks are working. If the tracks are working in materials which cause corrosion to carbon steel, you must replace standard tracks with lubricated tracks to avoid seizure of the track joints. Lubricated tracks are available as an optional extra from new or as a retrofit for customers entering adverse working conditions. Track chains can also seize in particular conditions if they remain stationary for more than a few days, causing kinks in the chain. This can be prevented by tracking the machine on a daily basis as outlined in Section 1.6 of this manual, Basic Maintenance. However, should this problem occur, it may be possible to remedy by applying penetrating fluid to the seized pin, leaving for several hours, then tracking the machine several meters forward and back. If lubricating the pin is unsuccessful, the problem can be resolved by cutting out the seized link including the pin and bush, replacing it with a complete repair link (see Section 4.8). If there are several links seized on a single track chain, it may be necessary to remove the track from the machine and have it repaired at a specialised track repair shop, or to replace the complete track chain.

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