Kobelco Hydraulic Schematic Section
Kobelco America Inc.
Page 6-7
NOTE: The information listed in the troubleshooting table is for reference only. The troubleshooting table was developed around the SK210 and SK250 Negative Control Dynamic Acera.
Page 6-8
Troubleshooting Table SK210 and SK250 Negative Control
Boom raise inching
O
O
O
O
O
Boom raise full lever
O O O O O O
O O O O O O
O O O O O O
O O O O O O
O O
O
O
O
O
O
O
O
O
O
Boom lower Arm out inching Arm out full lever Arm in inching Arm in full lever Arm in heavy digging (Full lever, sequence conflux) Bucket digging
(F
O
O
O O
O
O
O
O
O O O O O O
O O
O
O
O O
O
O
O O
O
O
O
O O O O O O
O O
O
O
O
O
O
O
O O O O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O O O
O
O
O
O
O
O
O O O O
O O
O
O
Bucket dump
O
O
O
O
O
Bucket digging (Full lever, conflux)
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
Bucket dump (full lever, conflux)
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
Swing
O
O
O
O
O
O
Travel RH and LH (1st speed)
O
O
O
O
O
O
Travel RH and LH (2nd speed)
O
O
O
O
O
O
Travel right + Boom
O
O
O
O
O
O
O
Travel right + Bucket
O
O
O
O
O
O
O
Travel right + Arm
O
O
O
O
O
O
Travel right + Swing
O
O
O
O
O
O
Travel left + Boom
O
O
O
O
O
O
Travel left + Bucket
O
O
O
O
O
O
Travel left + Arm
O
O
O
O
O
O
Travel left + Swing
O
O
O
O
O
O
Travel RH and LH + Boom raise
O
O
O
O
O
O
Arm in + Swing (Swing priority)
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
Independent Travel Travel and Boom up Independent Travel Travel / Boom up & Swing
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O O
O O
O
O
O
O O
O
O
O
O O
O
O
O O
O
O
O
O
O
O O
O O
O
O O
O
O
O
O
O O
O
O O
O O
O
O
O
O O
O O
O
O O
O
O O
O
O
Arm lock valve
O
O O O O
O
Other
Boom lock valve
Bucket Cylinder
Arm Cylinder
Boom cylinder
Cylinder
Swing motor
LH travel Motor
RH Travel motor
Nega-Con back pressure valve
P2 Neg - Con valve
P1 Neg - Con valve
Arm T2 valve
Arm variable recirculation
Arm conflux valve
Boom conflux valve
Travel straight valve
P2 by-pass cut valve
P1 by-pass cut valve
Travel left
Travel right
Swing
Bucket
Arm
O
Motor
O O O O
O
O O O O
Lever lock
Travel 2-speed solenoid valve
A7 SV- A2 A1 SV3 4 SV-2
Boom
A8 SV-1
Att boost sol. Valve
Swing parking brake solenoid valve
Swing priority propo. Valve
Ind. Travel propo. Valve
Ind. Travel propo. Valve
P1 by-pass cut propo. valve
Travel Straight propo. valve
A3 A4 A5 A6 A7 A8 PSV PSV PSV PSV PSV PSV D E F H B C
P2 pump
A6 PSV A
P2 by- pass cut propo. valve
P2 pump propo. valve Arm variable recirculation propo. valve
P1 pump propo. valve
Back pressure sensor
Nega-Con sensor
SE1 SE22 SE26 PSV PSV ~ ~ ~ SE28 P2 P1 SE10 SE23 SE27
Hydraulic Device Control valve
P1 pump
Code
High pressure sensor
Low pressure sensor
Electrical circuit
O
O
O
O O
O
O O
O
O
O
Page 6-9
SK160 - Neutral Corcuit Positive Control
Kobelco Hydraulic Schematic Legend Item #
SK160 Schematic Section Item # a1 a2 a3 a4 a5 a6 a7 a8 a9 A1 A2 A3 A4 PSV1 PSV2 PH1 PH2 SE-22 SE-23 B1 B3 Dr3 P3 Page 6-10
Hydraulic Pump Schematic Legend Description Test port P1 pump High Pressure Test port P2 pump High Pressure Test port P1 proportional solenoid valve (PSV 1) Test port P2 proportional solenoid valve (PSV2)
Test port P3 Pilot Pressure
Delivery port P1 pump Delivery port P2 pump Delivery port P3 pump proportional solenoid valve P1 pump proportional solenoid valve P2 pump Pump high pressure port P1 Pump high pressure port P2 High pressure sensor P1 pump High pressure sensor P2 pump Supply oil for P1 and P2 pump Supply oil for P3 pump Drain for pilot pump P3 Pilot pump
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 30
Description Main Hydraulic pump Main Control Valve Swing Motor Travel Motor Assy. Boom Cylinders Arm Cylinder Bucket Cylinder Swivel Joint Left hand pilot valve Right hand pilot valve Travel pilot valve Oil Cooler Pilot filter manifold Accumulator Suction strainer 8 Solenoid block Return filter By-pass check valve Tank breather Return check valve Return check valve (oil cooler) One way check assy. Independent by-pass valve Independent by-pass solenoid Swing priority solenoid Slow return check Swing priority/Breaker Option Valve
SK160 - Neutral Corcuit Positive Control
SK160 Neutral Circuit Positive Control Page 6-11
ED190 - Neutral Circuit Positive Control
Kobelco Hydraulic Schematic Legend
ED190 Hydraulic Schematic D1 D2 D3 SE9 SE10
CONTROL VALVE DOZER SOLENOID DOZER PILOT CONTROL PRESSURE SENSOR TRAVEL PRESSURE SENSOR TRAVEL
Page 6-12
Item # a1 a2 a3 a4 a5 a6 a7 a8 a9 A1 A2 A3 A4 PSV1 PSV2 PH1 PH2 SE-22 SE-23 B1 B3 B4 Dr3 P3
Hydraulic Pump Schematic Legend Description Test port P1 pump High Pressure Test port P2 pump High Pressure Test port P1 proportional solenoid valve (PSV-1 Test port P2 proportional solenoid valve (PSV-2 Test port P4 Dozer pump Test port P3 Pilot Pressure
Delivery port P1 pump Delivery port P2 pump Delivery port P3 pump Delivery port P4 pump proportional solenoid valve P1 pump proportional solenoid valve P2 pump Pump high pressure port P1 Pump high pressure port P2 High pressure sensor P1 pump High pressure sensor P2 pump Supply oil for P1 and P2 pump Supply oil for P3 pump Supply oil for P4 pump Drain for pilot pump P3 Pilot pump
Item # 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 30
Description Main Hydraulic pump Main Control Valve Swing Motor Travel Motor Assy. Boom Cylinders Arm Cylinder Bucket Cylinder Swivel Joint Left hand pilot valve Right hand pilot valve Travel pilot valve Oil Cooler Pilot filter manifold Accumulator Suction strainer 8 Solenoid block Return filter By-pass check valve Tank breather Return check valve Return check valve (oil cooler) One way check assy. Independent by-pass valve Independent by-pass solenoid Swing priority solenoid Slow return check Swing priority/Breaker Option Valve
ED190 - Neutral Circuit Positive Control
ED190 Neutral Circuit Positive Control Page 6-13
SK210 ~ 250 - Neutral Circuit Negative Control
Kobelco Hydraulic Schematic Legend
SK210~290 Schematic Section Item # a1 a2 a3 a4 a5 a6 a7 a8 a9 A1 A2 A3 A4 PSV1 PSV2 PH1 PH2 SE-22 SE-23 B1 B3 Dr3 P3 PN1 PN2 Page 6-14
Hydraulic Pump Schematic Legend Description Test port P1 pump High Pressure Test port P2 pump High Pressure Test port P1 proportional solenoid valve (PSV-1) Test port P2 proportional solenoid valve (PSV-2) Test port P1 pump High Pressure Test port P2 pump High Pressure Test port P3 Pilot Pressure Test port P1 proportional solenoid valve (PSV-1) Test port P2 proportional solenoid valve (PSV-2) Delivery port P1 pump Delivery port P2 pump Delivery port P3 pump proportional solenoid valve P1 pump proportional solenoid valve P2 pump Pump high pressure port P1 Pump high pressure port P2 High pressure sensor P1 pump High pressure sensor P2 pump Supply oil for P1 and P2 pump Supply oil for P3 pump Drain for pilot pump P3 Pilot pump Signal line from P1 section of main control valve Signal line from P2 section of main control valve
Item # 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 30 T.S.
Description Main Hydraulic pump Main Control Valve Swing Motor Travel Motor Assy. Boom Cylinders Arm Cylinder Bucket Cylinder Swivel Joint Left hand pilot Valve Right hand pilot valve Travel pilot valve Oil Cooler Pilot filter manifold Accumulator Suction strainer 8 Solenoid block Return filter Bypass check valve Tank breather Return check valve Return check valve Slow return check valve Independent travel bypass valve Independent travel solenoid valve Swing priority solenoid Slow return check valve One way check for swing priority Swing priority/Breaker Option Valve Temperature sensor
SK210 ~ 250 - Neutral Circuit Negative Control
SE26 SE22
P
P
a5
a1
PSV1
PH1
A1 A2
P
a2
SE23 a6
PSV2 PH2
SE27
P1
a8
P
P2 a9 PN2
BOOM
TRAVEL INDEPENDENT VALVE P2
T
P
PN1
23
6
L.H.
Dr A2 Ø1.0 A1
BOOM
12
Pi2 T
5
R.H.
Pi1 Ø1.0 P1
24
TRAVEL INDEPENDENT S/V
P1
P2 210L
a3
B1
B3
Dr3
ARM PBL REV.
PTb
a7 Dr
CMR2
MR1
PL1
10.0 cc/rev
TRAVEL PRIORITY 147kPa
490kPa
AL FOR.
TRAVEL LEFT CP2
CT2
Drb
BL REV.
LCs
PAS LEF.
PAr FOR.
17
18
27.9MPa at180L
SWING
CT1
Br REV.
LEF. AS
TRAVEL RIGHT
BS RIG.
Ar FOR.
CP1
(T3)
Dra
BOOM CONFLUENCE LCc
P
13
T
P
PBc
DIG.
PAc
DIS
Bc
DIG
Ac
DIS
PBb LOW. Drc PLc1 PAb RAI
11 ACC
14 4
1
5
2
Bb
ARM
LCa
BOOM
MB
PAa DIG.
CRb
4
Aa DIG.
39.7MPa at 30L
37.7MPa at30L
37.7MPa at30L
CRa
VA VB
X1
Ø3.5
Ø0.6
ARM CONFLUENCE Ø0.4
Ø0.4
Ø0.4
9
Ø0.4
Pis
P1 NUTRAL CUT
P2 NUTRAL CUT
ARM VARIABLE RECIRCULATION
PCa
Ø0.3
CCa
PA1
C A F E D B
Ø1.7X4 Ø1.7X4 T
P
L.H.
R.H.
10
10
T
Pn2
Pn1
P
Pn1'
Pn2'
3.14MPa at35L
3.14MPa at35L
Tn1
Ø0.6
Ba DIS.
RAI
PCb
BOOM&BUCKET PILOT VALVE
D
Ø0.3
LEFT TRAVEL
PBa DIS.
39.7MPa at30L Ab
ARM&SWING PILOT VALVE
PG
PLc2 DIG. Drd
LOW.
RIGHT TRAVEL FORWARD RIGHT TRAVEL REVERSE LEFT TRAVEL FORWARD LEFT TRAVEL REVERSE
P SE9
P SE10
CCb LCb
A
6
M
PA Ø0.8
37.7MPa at30L
D B
3
A
PB1 39.7MPa at30L
BUCKET
95æm
C TRAVEL PILOT VALVE
DB
PB B
PBS RIG.
Ø14-Ø12.8
PBr REV.
SWING
27
SG
21
15
7 3
PAL FOR.
A3
20
19
8
2
CMR1
a4
M
1
BUCKET
T2
T
(P3)
P
PBo1
MA
P
MA
P
Ø0.3
Tn2
4
2
1
3
4
Ø0.6
2
30
37.7MPa at30L
AO1
SE8
P SE7
P SE6
P SE5
P SE4
P SE3
P SE2
P
37.7MPa at30L
VA (P4)
22
SE1
4
Ø1.0
RIGHT TRAVEL
Ø0.3
MB
D
BUCKET DIGGING BUCKET DISCHARGE
Ø1.2 Ø1.4
26
Ø0.6
VB
BO1
P
Pcr 35.8 37.3MPa
SE28
PAo1 3
1
Pcr35.8 ?37.3MPa
Ø1.4
BOOM RAISING BOOM LOWERING SWING LEFT SWING RIGHT ARM DIGGING ARM DISCHARGE
A2
A1
25 A1
LEVER LOCK
T
ATT BOOSTING
A3 P2 NEUTRAL CUT
A4 TRAVEL PRIORITY
A5 P1 NEUTRAL CUT
A6 ARM VARIABLE RECIRCULATION
A7 TRAVEL 1/2SPEED CHANGEOVER
A8 SWING P/B
P
16 T.S T P1
SK210 ~ 290 Neutral Control Negative Control
P2
Page 6-15
Minor Change Schematic COLOR CODING STANDARD FOR HYDRAULIC CIRCUITS Blue ................. Feed, drain, tank circuit Green ............... Return, make up circuit, Neutral control circuit Red ................... Primary pilot pressure, Orange ............. Main P1 pump delivery pressure,
Violet ................ Main P2 pump delivery pressure,
Blue tone ......... Valve operation to drain Red solenoid tip....... In active and exciting
HYDRAULIC SCHEMATIC LEGEND DESCRIPTION
ITEM #
DESCRIPTION
1
Main Hydraulic Pump
19
Hydraulic Return Check Valve
2
Main Control Valve
20
Fixed Restrictor Check Valve
3
Swing Motor
21
Fixed Restrictor Check Valve
22
Independent Travel Valve
4
Travel Motor Assy.
5
Boom Cylinder (LH)
6
Boom Cylinder (RH)
7
Arm Cylinder
8
Bucket Cylinder
9
Swivel Joint
10
Left and Right Hand Pilot Control Valves
11
Travel Pilot Control Valve
12
Pilot Filter
13
Hyd. Tank Suction Strainer
14
8 Solenoid Block
15 Hydraulic Return Filter and By-pass Valve 16
Page 6-16
HYDRAULIC SCHEMATIC LEGEND
ITEM #
23
Independent Travel Solenoids
24
Oil Cooler
25
Swing Priority Solenoid Valve
26
Dozer Pilot Control Valve
27
Dozer Control Valve
28
Blade Lift Cylinder - Left
29
Blade Lift Cylinder - Right
30
Blade Angle - Left
31
Blade Angle - Right
32
Blade Tilt Cylinder
33
Dozer Float/Pilot Solenoids
17
Air Breather Valve
34
Blade Angle Left/Right Solenoids
18
Hydraulic Return Check Valve
51
Breaker Valve
Minor Change SK210/250 MA
P
MA
P
4 ¿0.3
Pi1 P1'
¿0.3
P2' Pi2
SE22 P
PSVP1
Pcr A2
a2
a1
a2
a1 A1 A2
VB
¿0.6
VB ¿0.6
VA
VA
REG
P SE23
PN2
B
PB
PA
¿0.3
¿0.3
D
INDEPENDENT TRAVEL SOLENOIDS
at 46.5 Gal/min
4050 psi
M
D MB
TRAVEL RIGHT
TRAVEL LEFT B D E H C A
MB
~85 psi
~85 psi
9
a4
A
36 psi a3
B3 D3
MAIN CONTROL VALVE
B1
P2
24
71 psi
19
2
A3
P1
18 SWING LEFT SWING RIGHT
T2
T
4975 psi at 37Gal/min 5468 psi at 32Gal/min
12
ARM IN ARM OUT
CMR1 0.7 psi/9.9psi
17
15
BUCKET DUMP BUCKET DIGGING
CMR2
PL1 PTb
TRAVEL LEFT STRAIGHT TRAVEL
16
CT2
TRAVEL RIGHT
PBr
PBs PBs2 Pss PAs
SWING
CT1
PAr
¯ 1.4
Ar
P
SE5 ¯ 1.4
20
(T3)
CP1
Dra
52
(Optional)
¯ 1.4
As Bs
Br
HAND CONTROL VALVE PB3
(Optional) B
N
BUCKET NIBBLER
LCc
BOOM CONFLUENCE
PBc
PB1
PAc
¯ 1.0
5468 psi at 7.9 Gal/min
CCb
5758 psi at 8 Gal/min
PBb Drc PLc1 PAb
LCa
BOOM
LEVER LOCK
ARM
Pisc Aa
CRb CRa
5468 psi at8Gal/min
5758 psi at8Gal/min
Ab
P2 NEUTRAL A3 CUT
5758 psi at8Gal/min
¯ 0.4
¯ 3.5 X1 ARM CONFLUENCE
PCb
P ARM CYLINDER
PA1 PA2 2
PB2
3
1
CAr
T
¯ 1.0 TRAVEL PILOT VALVE
6
P
T
21 Ba
¯ 0.4 ¯ 0.4
P2 NUTRAL CUT
P ARM AND SWING
5468 psi at8Gal/min
¯ 0.4
P1 NUTRAL CUT
T
BO0M AND BUCKET
7
Pis
5 11 BOOM CYLINDERS
1
5
ARM VARIABLE RECIRCULATION
2
3
6
4
P SE10
P SE9
LEFT TRAVEL FORWARD
PA1
4
8
Bb
ATT A2 BOOSTING
1
21
PBa
PAa
A1
3
2
PLc2
Drd
LCb
14
PB1
PA4 PB4
BUCKET CYLINDER
BREAKER
SOL/V BLOCK
10
PA3
4
¯ 0.8
Bc Ac
T
SE7 SE8 P P
25
BL
LCs
Drb
13
PAL AL
CP2
BOOM UP BOOM DOWN
SE1 SE2 SE3 SE4 P P P P
PBL
HYD. TANK
51
B
a5
725 psi at 5.3Gal/min
Dr
M
P1
PG D
T
T T P
PN1
SWING
3
REG
PSVP2
PH2
PH1
A1
5192~5395 psi
T2
1
¿0.8
Pcr
23
¿0.6
5192~5395 psi
22 INDEPENDENT TRAVEL VALVE
LEFT TRAVEL REVERSE
PCa
CCa
RIGHT TRAVEL FORWARD RIGHT TRAVEL REVERSE
STRAIGHT A4 TRAVEL (P4)
PBo2
TB
PAo2
P1 NEUTRAL A5 CUT
NIBBLER/BREAKER PEDAL (Optional) 5468 psi at 8Gal/min
50
5468 psi at 8 Gal/min
Ao2
53
T P
Bo2
ARM VARIABLE A6 RECIRCULATION (P3)
B
C1
A C2 P SE11
TRAVEL 1/2SPEED A7 CHANGEOVER
SWING A8 P/B P2
Minor Change SK210LC/SK250LC-6E NEUTRAL CIRCUIT: Positive Control function with Safety Lever Down (Unlocked) and 2nd Travel solenoid activated
Page 6-17
Kobelco Hydraulic Schematic Legend Item # 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 30 T.S. Page 6-18
Description Main Hydraulic pump Main Control Valve Swing Motor Travel Motor Assy. Boom Cylinders Arm Cylinder Bucket Cylinder Swivel Joint Left hand pilot Valve Right hand pilot valve Travel pilot valve Oil Cooler Pilot filter manifold Accumulator Suction strainer 8 Solenoid block Return filter Bypass check valve Tank breather Return check valve Return check valve Slow return check valve Independent travel bypass valve Independent travel solenoid valve Swing priority solenoid Slow return check valve One way check for swing priority Swing priority/Breaker Option Valve Temperature sensor
Item # a1 a2 a3 a4 a5 a6 a7 a8 a9 A1 A2 A3 A4 PSV1 PSV2 PH1 PH2 SE-22 SE-23 B1 B3 Dr3 P3
Hydraulic Pump Schematic Legend Description Test port P1 pump High Pressure Test port P2 pump High Pressure Test port P1 proportional solenoid valve (PSV-1) Test port P2 proportional solenoid valve (PSV-2) Test port P1 pump High Pressure Test port P2 pump High Pressure Test port P3 Pilot Pressure Test port P1 proportional solenoid valve (PSV-1) Test port P2 proportional solenoid valve (PSV-2) Delivery port P1 pump Delivery port P2 pump Delivery port P3 pump proportional solenoid valve P1 pump proportional solenoid valve P2 pump Pump high pressure port P1 Pump high pressure port P2 High pressure sensor P1 pump High pressure sensor P2 pump Supply oil for P1 and P2 pump Supply oil for P3 pump Drain for pilot pump P3 Pilot pump
Minor Change SK290 MA
P
MA
P
4 ¿0.3
Pi1 P1'
¿0.3
Pcr A1
35.8~37.2 MPa
A2
a2
a1
¿0.8 VB
¿0.6
VB ¿0.6
VA
VA
REG
REG
Pcr
T2
1
¿0.6
35.8~37.2 MPa
23
(365.8~37.2 Kgf/cm2)
22 INDEPENDENT TRAVEL VALVE
(365.8~37.2 Kgf/cm2)
P2' Pi2
SWING
3
PG SE22 P
PSVP1
a1 A1 A2
a2
P SE23
D
B
PSVP2
PH2
PH1
T
T T P
PN1
PN2
¿0.3
¿0.3
D
INDEPENDENT TRAVEL SOLENOIDS
D MB
TRAVEL RIGHT
TRAVEL LEFT B D E H C A
MB
27.9MPa (285 Kgf/cm2) at180 VL/min
M
a4
643
5.0MPa (51 Kgf/cm2) a5 at 20L/min
Dr
M
A
245kPa (2.5 Kgf/cm2)
a3 B3 D3
PB
PA
~6Kg/cm 2
~6Kg/cm 2
9
MAIN CONTROL VALVE
B1
490kPa (5 Kgf/cm2)
19
2
A3
P2
P1
B
24 18 T2
T
34.3MPa (350 Kgf/cm2) at 140L/min 37.7MPa (385 Kgf/cm2) at 120L/min
12
CMR1 CMR2
PL1 PTb
PBL
SWING LEFT SWING RIGHT
PAL AL
ARM IN ARM OUT
CP2
BL
BUCKET DUMP BUCKET DIGGING
LCs
¯ 1.4 PBs PBs2 Pss P SE5 PAs
TRAVEL LEFT 17 TRAVEL PRIORITY 15
16
CT2
Drb
TRAVEL RIGHT
PBr
CT1
PAr
13
SWING ¯ 1.4
Ar
HYD. TANK
BUCKET
LCc
T
P1 P2
P1
14
T
PB1
39.7MPa (405 Kgf/cm2) at30L/min
PAc
¯ 0.8
¯ 1.4
20
HAND CONTROL VALVE PB3
Bc Ac
CCb
PBb Drc PLc1 PAb
PB1
PA4 PB4 3
2
1
4
PA1 PA2 2
PB2
3
1
PLc2
Drd
LCb LCa
BOOM
10
PA3
4
37.7MPa (385 Kgf/cm2) at30L/min
SOL/V BLOCK
25 (Optional)
BOOM CONFLUENCE
PBc
Pi1
SE7 SE8 P P
(T3)
CP1
Dra
25
SE1 SE2 SE3 SE4 P P P P
As Bs
Br
BOOM UP BOOM DOWN
¯ 1.0
21 BUCKET CYLINDER
PBa
ARM
21 PAa
Bb A1
8
LEVER LOCK
Ab ATT A2 BOOSTING P2 NEUTRAL A3 CUT
¯ 0.4
CAr
39.7MPa 2
(405 Kgf/cm )
(385 Kgf/cm2)
¯ 0.4
P
T
P2 NEUTRAL CUT
ARM VARIABLE RECIRCULATION
Pis 5
PCa
11
CCa 1
LEFT TRAVEL FORWARD
PBo1
(P3)
5
2
P SE9
3
6
4
P SE10
LEFT TRAVEL REVERSE
PAo1
RIGHT TRAVEL FORWARD RIGHT TRAVEL REVERSE
37.7MPa at 30L
37.7MPa at 30L 50
ARM VARIABLE A6 RECIRCULATION
TRAVEL PILOT VALVE
6
¯ 0.4
TRAVEL A4 PRIORITY
Ao1
T
7
Ba
BOOM CYLINDERS
P1 NEUTRAL A5 CUT
P ARM AND SWING
¯ 1.0
at30L/min
¯ 0.4
P1 NEUTRAL CUT
ARM CYLINDER
37.7MPa
T
BO0M AND BUCKET
at30L/min
¯ 3.5 X1 ARM CONFLUENCE
PCb
PA1
CRa
37.7MPa (385 Kgf/cm2) at30L/min 39.7MPa (405 Kgf/cm2) at30L/min
P
Pisc Aa
CRb
Bo1
LEGEND Secondary pilot pressure: 6 Kgf/cm2 ~ 30 Kgf/cm2 (85.3 ~ 426.7 psi)
(P4)
TB
System drain pressure: 2.5 Kgf/cm2 ~ 5 Kgf/cm2 (35.6 ~ 71.1 psi) Case drain pressure: 0.05 Kgf/cm2 ~ 0.7 Kgf/cm2 (0.7 ~ 9.9 psi)
TRAVEL 1/2SPEED A7 CHANGEOVER
Filter drain pressure: 0.05 Kgf/cm2 ~ 1.05 Kgf/cm2 (0.7 ~ 14.9 psi) Pump flow circuit: 5 Kgf/cm2 (71.1 psi) Primary pilot pressure: 51 Kgf/cm2 (725 psi)
SWING A8 P/B
Spool operation to drain
P2 SK290LC/SK330LC-6E Dynamic Acera TM, 09/03 Rev.1
Minor Change SK290LC-6E NEUTRAL CIRCUIT: Positive Control function with Safety Lever Down (Unlocked) and Fast Travel activated
Pump feed circuit
Page 6-19
SK330 - Neutral Circuit Neagtive Control
SK330 Schematic Section Item # a1 a2 a3 a4 a5 a6 a7 a8 a9 A1 A2 A3 A4 PSV1 PSV2 PH1 PH2 SE-22 SE-23 B1 B3 Dr3 P3 PN1 PN2 Page 6-20
Hydraulic Pump Schematic Legend Description Test port P1 pump High Pressure Test port P2 pump High Pressure Test port P1 proportional solenoid valve (PSV-1) Test port P2 proportional solenoid valve (PSV-2) Test port P1 pump High Pressure Test port P2 pump High Pressure Test port P3 Pilot Pressure Test port P1 proportional solenoid valve (PSV-1) Test port P2 proportional solenoid valve (PSV-2) Delivery port P1 pump Delivery port P2 pump Delivery port P3 pump proportional solenoid valve P1 pump proportional solenoid valve P2 pump Pump high pressure port P1 Pump high pressure port P2 High pressure sensor P1 pump High pressure sensor P2 pump Supply oil for P1 and P2 pump Supply oil for P3 pump Drain for pilot pump P3 Pilot pump Signal line from P1 section of main control valve Signal line from P2 section of main control valve
Kobelco Hydraulic Schematic Legend Item # 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 30 T.S.
Description Main Hydraulic pump Main Control Valve Swing Motor Travel Motor Assy. Boom Cylinders Arm Cylinder Bucket Cylinder Swivel Joint Left hand pilot Valve Right hand pilot valve Travel pilot valve Oil Cooler Pilot filter manifold Accumulator Suction strainer 8 Solenoid block Return filter Bypass check valve Tank breather Return check valve Return check valve Slow return check valve Independent travel bypass valve Independent travel solenoid valve Swing priority solenoid Slow return check valve One way check for swing priority Swing priority/Breaker Option Valve Temperature sensor
SK330 - Neutral Circuit Neagtive Control
∅ 0. 7
SK330 T2 spool Page 6-21
SK480 - Neutral Circuit Negative Control
Kobelco Hydraulic Schematic Legend
SK480 Hydraulic Schematic Item # a1 a2 a3 a4 a5 a6 a7 a8 a9 A1 A2 A3 A4 PSV1 PSV2 PH1 PH2 SE-22 SE-23 B1 B3 Dr3 P3 PN1 PN2 Page 6-22
Hydraulic Pump Schematic Legend Description Test port P1 pump High Pressure Test port P2 pump High Pressure Test port P1 proportional solenoid valve (PSV-1) Test port P2 proportional solenoid valve (PSV-2) Test port P1 pump High Pressure Test port P2 pump High Pressure Test port P3 Pilot Pressure Test port P1 proportional solenoid valve (PSV-1) Test port P2 proportional solenoid valve (PSV-2) Delivery port P1 pump Delivery port P2 pump Delivery port P3 pump proportional solenoid valve P1 pump proportional solenoid valve P2 pump Pump high pressure port P1 Pump high pressure port P2 High pressure sensor P1 pump High pressure sensor P2 pump Supply oil for P1 and P2 pump Supply oil for P3 pump Drain for pilot pump P3 Pilot pump Signal line from P1 section of main control valve Signal line from P2 section of main control valve
Item # 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 T.S.
Description Main Hydraulic pump Main Control Valve Swing Motor Travel Motor Assy. Boom Cylinders Arm Cylinder Bucket Cylinder Swivel Joint Left hand pilot Valve Right hand pilot valve Travel pilot valve Oil Cooler Pilot filter manifold Accumulator Suction strainer 8 Solenoid block Return filter Bypass check valve Tank breather Return check valve Return check valve Slow return check valve Independent travel bypass valve Independent travel solenoid valve Shuttle valve Temperature sensor
SK480 - Neutral Circuit Negative Control
Page 6-23
10
GENERAL HYDRAULIC SPECIFICATIONS
GENERAL HYDRAULIC SPECIFICATIONS
Table of contents Page SK160LC/ED190 TECHNICAL SPECIFICATIONS ................................................................................................ 06a-2 SK210LC/SK250LC-6E TECHNICAL SPECIFICATIONS ...................................................................................... 06a-4 SK290LC/SK330LC-E TECHNICAL SPECIFICATIONS ........................................................................................ 06a-6
WARNING READ, UNDERSTAND AND FOLLOW ALL SAFETY PRECAUTIONS AND PROCEDURES FOUND IN THIS MANUAL BEFORE ATTEMPTING ANY OPERATION, INSPECTION OR MAINTENANCE OF THIS MACHINE, ATTACHMENT OR SYSTEMS. KOBELCO CANNOT ANTICIPATE EVERY POSSIBLE CIRCUMSTANCE THAT MIGHT INVOLVE A POTENTIAL HAZARD. THE WARNINGS IN THIS PUBLICATION AND ON THE PRODUCT ARE THEREFORE NOT ALL INCLUSIVE. IF A TOOL, PROCEDURE, WORK METHOD OR OPERATING TECHNIQUE NOT SPECIFICALLY RECOMMENDED BY KOBELCO IS USED, YOU MUST SATISFY YOURSELF THAT IT IS SAFE FOR YOU AND OTHERS. YOU SHOULD ALSO ENSURE THAT THE PRODUCT WILL NOT BE DAMAGED OR MADE UNSAFE BY THE OPERATION, LUBRICATION, MAINTENANCE AND/OR REPAIR PROCEDURES YOU CHOOSE.
Dynamic Acera MC Training, 09/03 Rev. 0
10
Page 06a-1
GENERAL HYDRAULIC SPECIFICATIONS MRV
SK160LC/ED190-6E DYNAMIC ACERA (MINOR CHANGE)
OR9
OR9
OR1
OR7
OR4
OR6
TOP VIEW
OR5
TL
SWING
BC
ARM
AVR
a7 NBV TP
TR
BUCKET BOOM
P1NC
BHV
OR4
a10 OR10
a2
DOZER PUMP
a7
a3 PSV-P2
a4: Located under P2 regulator
PSV-P1
a1: P1 high pressure port a2: P2 high pressure port a3, a4: Secundary pilot pressure ports on pump proportional solenoids PSV-P1 and PSV-P2 a7: Primary pilot pressure port a10: Main pressure port for dozer circuit MRV: Main relief valve OR1: Port relief for bucket dig function a1 OR2: Port relief for bucket dump function PB OR3: Port relief for boom up function OR4: Port relief for boom down function B OR7: Port relief for arm in function OR8: Port relief for arm out function PG OR9: Port relief for nibbler close function OR10: Port relief for nibbler open function PSV-P1: Proportional solenoid valve for P1 A PSV-P2: Proportional solenoid valve for P2 NBV: Nibbler/Breaker Valve AVR: Arm Variable Recirculation Valve PA BC: Boom Conflux Valve TL: Travel Left Valve Swing TP: Travel Priority Valve shockless valve P1NC: P1 Neutral Cut Valve BHV: Boom Holding Valve AC: Arm Conflux Valve P2NC: P2 Neutral Cut Valve A,B AHV: Arm Holding Valve Code
Name
Size
A, B
Main port
2-PF 3/4
Torque N-m (Kgf-m)
M
10
DB
Page 06a-2
LS VIEW
OR3
OR2 MRV
L
OR9
DB IP
M OR1
PB
PA M
2-M12 depth 24 Lifting cap. 220 Kg (2 bolts) DB
Relief valve
OR10
OR4 BOTTOM VIEW
OR4
OR1
AC
Model
PG
167 (17) PF 3/4
OR1
MRV
FRONT
SK160LC~SK210LC-6E
Make-up port PF 1
216 (22)
SK250LC-6E
PF 3/8
74 (7.5)
SK160LC~SK210LC-6E
PF 1/2
98 (10)
SK330LC-6E
PF 1/4
36 (3.7)
Drain port
PA, PB
Gauge port
PG
Brake release port
L
Gear oil level port
PT 1/2
65 (6.6)
IP
Gear oil level port
PT 3/4
98 (10)
P2NC
IP
Rotation direction (Viewed from shaft end) Oil inlet A ....... Clockwise (CW) Oil inlet B ....... Counterclockwise (CCW)
AHV
OR8
OR10
Dynamic Acera MC Training, 09/03 Rev. 0
Dynamic Acera MC Training, 09/03 Rev. 0
Engine RPM
Proportional solenoid valves
Port relief valves
Dozer circuit
Main relief valve
Pilot circuit
Standards for testing
PF 1/4
Main hyd. pumps
Monitor display active in troubleshooting code system.
PSVP2
PSV-E D-11
PSV-F D-12
Prop. solenoid valve pump2
Independent travel valve pump 1 Independent travel valve pump 2
PSV-A D-6
Arm variable recirculation
PSVP1
N…22
PSV-C D-3 Travel priority
Prop. solenoid valve pump 1
N…21
PSV-B D-2 P2 neutral cut
N…33
N…32
N…25
N…24
N…23
N…20
PSV-D D-1
a2
a1
P1 P2
a2
a1
P1
P2
a1
a1+a2
a1+a2
a1+a2
a1
P1
Left
Right
Head
Rod
a1+a2
a1+a2
Rod
Head
a1+a2
a1
a10
Head
Rod
Gear pump
a2
P2 P4
a1
a2
P1
P2
a1
P1
a1
a7
a2 Main hyd. pump
Pilot pump (Gear)
LS (P2)
RS (P1)
P3
Inactive: 0~100 psi (340~355 mA) Active: 327~370 Kg/cm2 (635~650 mA)
Neutral: 0~100 psi (340~355 mA) Active: 140~285 psi (450~480 mA)
Neutral: 0~100 psi (200~220 mA) Active: 140~285 psi (450~480 mA)
Active: 140~150 psi (400~420 mA) Neutral: 4~6 Kg/cm2 (300~320 mA)
Neutral: 0~100 psi (200~220 mA) Active: 400~420 Kg/cm2 (700~710 mA)
380 (5410)
385 (5475)
385 (5475)
290~320 (4125~4551)
380~405 (5405~5760)
350~385 (4977~5475)
350~385 (4977~5475)
380~405 (5405~5760)
380~405 (5405~5760)
350~385 (4977~5475)
250 (3550)
350~355 (4978~5049)
380~395 (5405~5618)
350~355 (4978~5049)
50 ~ 55 (711 ~ 782)
950 ~ 1100
Auto-decel
2175 ~ 2225 2405 ~ 2455
Monitor display or tachometer
B-mode
A-mode
P1 neutral cut
Travel
Swing priority system
Auxiliary system (Breaker)
Swing
Bucket
Arm
Boom
Dozer
Attachment (Standard)
Attachment (Power boost)
Travel
Primary pressure
High RPM
2405 ~ 2455
M-mode
60 ~ 90 (140 ~ 194)
45 ~ 55 (113 ~ 131)
Class NAS 7-9
975 ~ 1025
Radiator surface
Engine coolant temperature
Port
Pressures & Current Specifications
Low idle
Hydraulic oil tank surface
Temperature of hydraulic oil
Size Hydraulic oil tank
Location
Reading from
Cleanlliness of hydraulic oil
Item or component
SK160LC/ED190
TOR3, TOR4
TOR1, TOR2
OR10
OR9
OR6
OR5
OR2
OR1
OR 7
OR8
OR3
OR 4
DRV1
MR1
PR1
CPU and stepping motor linkage.
-----
-----
-----
Adjustment point
Note: pressure readings indicated in monitor display are calculated values by the ITCS. For any troubleshooting analysis, it is necessary a comparison between real pressure gauge readings and monitor display readings.
Kg/cm2 (Psi)
RPM
… C (… F)
-----
Unit
10.8 SK160LC/ED190 TECHNICAL SPECIFICATIONS
Travel locked, travel and boom up functions simultaneously activated with throttle at high idle position.
LS track turning
RS track turning
Stall arm in function with throttle at high idle position.
Stall boom up function with throttle at high idle position.
Stall arm out function with throttle at high idle position.
Stall travel function with throttle at high idle position.
Bucket locked, arm in and swing functions simultaneously activated with throttle at high idle position.
Stall auxiliary system with throttle at high idle position.
Bucket locked and right swing function activated in high idle.
Bucket locked and left swing function activated in high idle.
Stall bucket dig function in high idle.
Stall bucket dump function in high idle.
Stall arm in function in high idle.
Stall arm out function in high idle.
Stall boom up function in high idle.
Stall boom down function in high idle.
Stall dozer up function in high idle.
Stall boom up function in high idle.
Stall boom up function with heavy lift active in high idle.
Stall travel function in high idle.
Throttle in high idle.
Throttle in high idle, A/C off and auto accel system active.
Throttle in high idle, A/C off, and auto accel system inactive.
Throttle in low idle, A/C off and auto accel system inactive.
Ambient temperature -10 … C ~ 50 … C (14 … F~… 122 … F)
Take sample
Testing condition
GENERAL HYDRAULIC SPECIFICATIONS
10
Page 06a-3
GENERAL HYDRAULIC SPECIFICATIONS MRV
SK210LC/SK250LC-6E DYNAMIC ACERA (MINOR CHANGE) YQ109SWingMotor&CV
OR9
OR9
OR1
OR7 TOP VIEW
OR4
TL
SWING
BC
ARM
AVR
OR5
OR6
NBV TP
TR
BUCKET BOOM
P1NC
BHV
OR4
OR10
PSV-P1 a9 PSV-P1
a8
a2 SE23
a1
SE22
a1: P1 high pressure port a2: P2 high pressure port a3, a4: Secundary pilot pressure ports on pump proportional solenoids PSV-P1 and PSV-P2 a7: Primary pilot pressure port a10: Main pressure port for dozer circuit MRV: Main relief valve OR1: Port relief for bucket dig function OR2: Port relief for bucket dump function OR3: Port relief for boom up function OR4: Port relief for boom down function OR7: Port relief for arm in function OR8: Port relief for arm out function OR9: Port relief for nibbler close function OR10: Port relief for nibbler open function PSV-P1: Proportional solenoid valve for P1 PSV-P2: Proportional solenoid valve for P2 SE22: High pressure sensor for P2 circuit SE23: High pressure sensor for P1 circuit NBV: Nibbler/Breaker Valve AVR: Arm Variable Recirculation Valve BC: Boom Conflux Valve TL: Travel Left Valve TP: Travel Priority Valve P1NC: P1 Neutral Cut Valve BHV: Boom Holding Valve AC: Arm Conflux Valve P2NC: P2 Neutral Cut Valve AHV: Arm Holding Valve Code
Name
Size
A, B
Main port
2-PF 3/4
Torque N-m (Kgf-m)
LS VIEW
M
10
DB
Page 06a-4
OR3
OR2
MRV
OR9
L
PB DB B IP
PG
A M
OR1
PA Swing shockless valve
PB
PA M
2-M12 depth 24 Lifting cap. 220 Kg (2 bolts) BOTTOM DB Relief VIEW valve
OR10
OR4 OR4
OR1
A,B
AC
Model
PG
167 (17) PF 3/4
OR1
MRV
FRONT
SK160LC~SK210LC-6E
Make-up port PF 1
216 (22)
SK250LC-6E
PF 3/8
74 (7.5)
SK160LC~SK210LC-6E
PF 1/2
98 (10)
SK330LC-6E
PF 1/4
36 (3.7)
Drain port
PA, PB
Gauge port
PG
Brake release port
L
Gear oil level port
PT 1/2
65 (6.6)
IP
Gear oil level port
PT 3/4
98 (10)
P2NC
IP
Rotation direction (Viewed from shaft end) Oil inlet A ....... Clockwise (CW) Oil inlet B ....... Counterclockwise (CCW)
AHV
OR8
OR10
Dynamic Acera MC Training, 09/03 Rev. 0
Dynamic Acera MC Training, 09/03 Rev. 0
Engine RPM
Proportional solenoid valves
Port relief valves
Main relief valve
Pilot circuit
Standards for testing
PF 1/4
Main hyd. pumps
Monitor display active in troubleshooting code system.
N…21
N…22
PSV-B D-2
PSV-C D-3
PSV-A D-6
PSV-1 E-1 PSV-2 E-2 PSV-E D-11
PSV-F D-12
P2 neutral cut
Travel priority
Arm variable recirculation
Prop. solenoid valve pump 1 Prop. solenoid valve pump2 Independent travel valve pump 1 Independent travel valve pump 2
N…33
N…32
N…25
N…24
N…23
N…20
PSV-D D-1
a2
a1
P1 P2
a2
a1
P1
P2
a1
a1+a2
a1+a2
a1+a2
a1
a1+a2
P1
Left
Right
Head
Rod
Head
a1+a2
Rod
a1
Rod
a1+a2
a2
P2
Head
a1
a2
P1
P2
a1
P1
a1
a7
a2 Main hyd. pump
Pilot pump (Gear)
LS (P2)
RS (P1)
P3
Inactive: 180~210 psi (470~480 mA) Active: 350~370 Kg/cm2 (650~670 mA)
Neutral: 90~100psi (340~350 mA) Active: 440~450 psi (740~750 mA)
Neutral: 140~150 psi (400~420 mA) Active: 370~380 psi (670~680 mA)
Neutral: 95~110 psi (340~360 mA) Active: 240~250 psi (500~520 mA)
Neutral: 0~100 psi (200~220 mA) Active: 400~420 psi (700~710 mA)
415 (5903)
385 (5475)
385 (5475)
327~355 (4653~5050)
350~405 (4977~5760)
350~385 (4977~5475)
350~385 (4977~5475)
350~405 (4977~5760)
350~405 (4977~5760)
350~385 (4977~5475)
350~355 (4978~5049)
380~395 (5405~5618)
350~355 (4978~5049)
50 ~ 55 (711 ~ 782)
950 ~ 1100
Auto-decel
1925 ~ 1975 2195 ~ 2245
Monitor display or tachometer
B-mode
A-mode
P1 neutral cut
Travel
Swing priority system
Auxiliary system (Breaker)
Swing
Bucket
Arm
Boom
Attachment (Standard)
Attachment (Power boost)
Travel
Primary pressure
High RPM
2195 ~ 2245
M-mode
60 ~ 90 (140 ~ 194)
45 ~ 55 (113 ~ 131)
Class NAS 7-9
950~ 1025
Radiator surface
Engine coolant temperature
Port
Pressures & Current Specifications
Low idle
Hydraulic oil tank surface
Temperature of hydraulic oil
Size Hydraulic oil tank
Location
Reading from
Cleanlliness of hydraulic oil
Item or component
SK210LC/SK250LC-6E
TOR3, TOR4
TOR1, TOR2
OR10
OR9
OR6
OR5
OR2
OR1
OR7
OR8
OR3
OR4
MR1
PR1
CPU and stepping motor linkage.
-----
-----
-----
Adjustment point
Note: pressure readings indicated in monitor display are calculated values by the ITCS. For any troubleshooting analysis, it is necessary a comparison between real pressure gauge readings and monitor display readings.
Kg/cm2 (Psi)
RPM
… C (… F)
-----
Unit
10.9 SK210LC/SK250LC-6E TECHNICAL SPECIFICATIONS
Indep. travel ON; travel locked, travel and boom up functions simultaneously activated with throttle at high idle position.
LS track turning
RS track turning
Stall arm in function with throttle at high idle position.
Stall boom up function with throttle at high idle position.
Stall arm out function with throttle at high idle position.
Stall travel function with throttle at high idle position.
Bucket locked, arm in and swing functions simultaneously activated with throttle at high idle position.
Stall auxiliary system with throttle at high idle position.
Bucket locked and right swing function activated in high idle.
Bucket locked and left swing function activated in high idle.
Stall bucket dig function in high idle.
Stall bucket dump function in high idle.
Stall arm in function in high idle.
Stall arm out function in high idle.
Stall boom up function in high idle.
Stall boom down function in high idle.
Stall boom up function in high idle.
Stall boom up function with heavy lift active in high idle.
Stall travel function in high idle.
Throttle in high idle.
Throttle in high idle, A/C off and auto accel system active.
Throttle in high idle, A/C off, and auto accel system inactive.
Throttle in low idle, A/C off and auto accel system inactive.
Ambient temperature -10 … C ~ 50 … C (14 … F~… 122 … F)
Take sample
Testing condition
GENERAL HYDRAULIC SPECIFICATIONS
10
Page 06a-5
GENERAL HYDRAULIC SPECIFICATIONS SK290LC/SK330LC-6E DYNAMIC ACERA (MINOR CHANGE)
OR7
MRV TOP VIEW
OR1 OR4
OR11 OR6
PSV-P1 a9 PSV-P1
a8
a2 SE23
a1
SE22
a1: P1 high pressure port a2: P2 high pressure port a3, a4: Secundary pilot pressure ports on pump proportional solenoids PSV-P1 and PSV-P2 a7: Primary pilot pressure port a10: Main pressure port for dozer circuit MRV: Main relief valve OR1: Port relief for bucket dig function OR2: Port relief for bucket dump function OR3: Port relief for boom up function OR4: Port relief for boom down function OR7: Port relief for arm in function OR8: Port relief for arm out function OR11: Braker function relief valve OR12: Port relief for swing priority function PSV-P1: Proportional solenoid valve for P1 PSV-P2: Proportional solenoid valve for P2 SE22: High pressure sensor for P2 circuit SE23: High pressure sensor for P1 circuit NBV: Nibbler/Breaker Valve AVR: Arm Variable Recirculation Valve BC: Boom Conflux Valve TL: Travel Left Valve TP: Travel Priority Valve P1NC: P1 Neutral Cut Valve BHV: Boom Holding Valve AC: Arm Conflux Valve P2NC: P2 Neutral Cut Valve AHV: Arm Holding Valve AT2: Arm T2 Valve (SK330LC only) Code
Name
Size
A, B
Main port
2-PF 3/4
DB
Page 06a-6
TP
TR
BC
ARM
Torque N-m (Kgf-m)
BUCKET BOOM
OR1 BHV
MRV
Breaker Valve
AVR
P1NC
OR4 OR11
LS VIEW
OR3
OR2 FRONT
OR12
OR11
MRV
L
PB DB B IP
PG
A
OR12 M
OR1
PA Swing shockless valve
PB
PA M
2-M12 depth 24 Lifting cap. 220 Kg (2 bolts) DB
Relief valve
OR4 BOTTOM VIEW
OR12 OR4
OR1
A,B
AC
Model
PG
167 (17) M
SWING
OR5
PF 3/4
10
TL
SK160LC~SK210LC-6E
P2NC
Make-up port PF 1
216 (22)
SK250LC-6E
PF 3/8
74 (7.5)
SK160LC~SK210LC-6E
PF 1/2
98 (10)
SK330LC-6E
PF 1/4
36 (3.7)
Drain port
PA, PB
Gauge port
PG
Brake release port
L
Gear oil level port
PT 1/2
65 (6.6)
IP
Gear oil level port
PT 3/4
98 (10)
IP
Rotation direction (Viewed from shaft end) Oil inlet A ....... Clockwise (CW) Oil inlet B ....... Counterclockwise (CCW)
AT2
AHV
OR8
Dynamic Acera MC Training, 09/03 Rev. 0
Dynamic Acera MC Training, 09/03 Rev. 0
Engine RPM
Proportional solenoid valves
Port relief valves
Main relief valve
Pilot circuit
Standards for testing
PF 1/4
Main hyd. pumps
Monitor display active in troubleshooting code system.
N…21
N…22
PSV-B D-2
PSV-C D-3
PSV-A D-6
PSV-1 E-1 PSV-2 E-2 PSV-E D-11
PSV-F D-12
P2 neutral cut
Travel priority
Arm variable recirculation
Prop. solenoid valve pump 1 Prop. solenoid valve pump2 Independent travel valve pump 1 Independent travel valve pump 2
N…33
N…32
N…25
N…24
N…23
N…20
PSV-D D-1
a2
a1
P1 P2
a2
a1
P1
P2
a1
a1+a2
a1+a2
a1+a2
a1
a1+a2
P1
Left
Right
Head
Rod
Head
a1+a2
Rod
a1
Rod
a1+a2
a2
P2
Head
a1
a2
P1
P2
a1
P1
a1
a7
a2 Main hyd. pump
Pilot pump (Gear)
LS (P2)
RS (P1)
P3
Inactive: 80~90 psi (350~360 mA) Active: 360~370 psi (670~680 mA)
Neutral: 270~280 psi (560~580 mA) Active: 440~460 psi (760~770 mA)
Neutral: 400~450 psi (700~720 mA) Active: 110~120 psi (360~370 mA)
Neutral: 90~100 psi (340~350 mA) Active: 220~240 psi (500~510 mA)
Neutral: 0~100 psi (200~220 mA) Active: 400~405 psi (700~710 mA)
420 (5974)
385 (5475)
385 (5475)
327~355 (4653~5050)
350~405 (4977~5760)
350~385 (4977~5475)
350~385 (4977~5475)
350~405 (4977~5760)
350~405 (4977~5760)
350~385 (4977~5475)
350~355 (4978~5049)
380~395 (5405~5618)
350~355 (4978~5049)
50 ~ 55 (711 ~ 782)
950 ~ 1100
Auto-decel
1925 ~ 1975 2315 ~ 2365
Monitor display or tachometer
B-mode
A-mode
P1 neutral cut
Travel
Swing priority system
Auxiliary system (Breaker)
Swing
Bucket
Arm
Boom
Attachment (Standard)
Attachment (Power boost)
Travel
Primary pressure
High RPM
2315 ~ 2365
M-mode
60 ~ 90 (140 ~ 194)
45 ~ 55 (113 ~ 131)
Class NAS 7-9
950~ 1025
Radiator surface
Engine coolant temperature
Port
Pressures & Current Specifications
Low idle
Hydraulic oil tank surface
Temperature of hydraulic oil
Size Hydraulic oil tank
Location
Reading from
Cleanlliness of hydraulic oil
Item or component
SK290LC/SK330LC-6E
TOR3, TOR4
TOR1, TOR2
OR10
OR9
OR6
OR5
OR2
OR1
OR7
OR8
OR3
OR4
MR1
PR1
CPU and stepping motor linkage.
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Adjustment point
Note: pressure readings indicated in monitor display are calculated values by the ITCS. For any troubleshooting analysis, it is necessary a comparison between real pressure gauge readings and monitor display readings.
Kg/cm2 (Psi)
RPM
… C (… F)
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Unit
10.10 SK290LC/SK330LC TECHNICAL SPECIFICATIONS
Travel locked, travel and boom up functions simultaneously activated with throttle at high idle position.
LS travel turning
RS travel turning
Stall arm in function with throttle at high idle position.
Stall boom up function with throttle at high idle position.
Stall arm out function with throttle at high idle position.
Stall travel function with throttle at high idle position.
Bucket locked, arm in and swing functions simultaneously activated with throttle at high idle position.
Stall auxiliary system with throttle at high idle position.
Bucket locked and right swing function activated in high idle.
Bucket locked and left swing function activated in high idle.
Stall bucket dig function in high idle.
Stall bucket dump function in high idle.
Stall arm in function in high idle.
Stall arm out function in high idle.
Stall boom up function in high idle.
Stall boom down function in high idle.
Stall boom up function in high idle.
Stall boom up function with heavy lift active in high idle.
Stall travel function in high idle.
Throttle in high idle.
Throttle in high idle, A/C off and auto accel system active.
Throttle in high idle, A/C off, and auto accel system inactive.
Throttle in low idle, A/C off and auto accel system inactive.
Ambient temperature -10 … C ~ 50 … C (14 … F~… 122 … F)
Take sample
Testing condition
GENERAL HYDRAULIC SPECIFICATIONS
10
Page 06a-7
GENERAL HYDRAULIC SPECIFICATIONS
10
Page 06a-8
Dynamic Acera MC Training, 09/03 Rev. 0
