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1V5137 LIFT CYLINDER AND MOUNTING GROUP Serial No. 50W2265 to 50W4394 inclusive 8J5779 Cylinder parts are shown on Page 236 988B


HYDRAULIC SYSTEM
CYLINDER GP
PUMP GP
CYLINDER GP
PUMP GP
CYLINDER GP
PUMP GP
CYLINDER GP
VALVE GP-PILOT
OPERATOR STATION
CONTROL GP-HYDRAULIC

WHEEL LOADER 988B WHEEL LOADER 50W
 988B WHEEL LOADER 50W00001-06040 (MACHINE) POWERED BY 3408 ENGINE SEBP1079 988B 50W   (1976)

HYDRAULIC SYSTEM

CYLINDER GP
LIFT CYLINDER GROUP
1U-4679 LIFT CYLINDER GROUP
CYLINDER & MOUNTING GP
1V-5137 CYLINDER & MOUNTING GP
CYLINDER & MOUNTING GP
1V-5137 CYLINDER & MOUNTING GP
CYLINDER & MOUNTING GP
1V-5137 CYLINDER & MOUNTING GP
CYLINDER & MOUNTING GP
1V-5137 CYLINDER & MOUNTING GP
CYLINDER & MOUNTING GP
1V-5137 CYLINDER & MOUNTING GP
 

#SEBP10790790
 

1V-5137: CYLINDER & MOUNTING GP

1V5137 LIFT CYLINDER AND MOUNTING GROUP
Serial No. 50W2265 to 50W4394 inclusive
8J5779 Cylinder parts are shown on Page 236
c220485 SEBP1079
1V5137 CYLINDER & MOUNTING GP Parts scheme
  For full view, you need register

Parts for your 988B WHEEL LOADER:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 8J-5779 Y [2] CYLINDER GROUP  
    (Separate Illustration)
2. 5P-7595 C [2] BOLT  
  3K-9770 C [2] NUT  
3. 4V-2113 C [4] COLLET  
4. 4V-2115 C [2] PIN  
5. 3B-8489 [2] FITTING  
6. 7K-9218 [4] SEAL  
  C   INDICATES CHANGE
  Y   SEPARATE ILLUSTRATION
 

#SEBP10790791
 

9J-0809: PUMP GP-GEAR

9J809 GEAR PUMP GROUP
Part of 1V5143 Gear Pump Group shown on Page 237
c238067 SEBP1079
9J0809 PUMP GP-GEAR Parts scheme
  For full view, you need register

Parts for your 988B WHEEL LOADER:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 4H-7331 [4] STUD  
2. 1B-4207 [8] NUT  
  6H-0190 [8] WASHER  
3. 7M-4298 [4] STUD  
4. 3G-1798 [1] SPACER  
5. 3G-1797 [2] SEAL  
6. 3G-7242 C [1] PLUG  
    THE FOLLOWING REPAIR KIT IS AVAILABLE:
  3G-1864 [1] KIT (seal)  
  C   INDICATES CHANGE
 

#SEBP10790792
 

1V-5137: CYLINDER & MOUNTING GP

1V5137 LIFT CYLINDER AND MOUNTING GROUP
Serial No. 50W4395 to 50W5501 inclusive
8J5779 Cylinder parts are shown on Page 236
c176159 SEBP1079
1V5137 CYLINDER & MOUNTING GP Parts scheme
  For full view, you need register

Parts for your 988B WHEEL LOADER:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 8J-5779 Y [2] CYLINDER GROUP  
    (Separate Illustration)
2. 6V-1749 C [2] BOLT  
  3K-9770 [2] NUT  
3. 5V-8417 C [4] COLLET  
4. 4V-2115 [2] PIN  
5. 3B-8489 [2] FITTING  
6. 7K-9218 [4] SEAL  
7. 4K-0684 C [4] WASHER  
  C   INDICATES CHANGE
  Y   SEPARATE ILLUSTRATION
 

#SEBP10790793
 

1V-4881: PUMP GP-GEAR

1V4881 GEAR PUMP GROUP
Part of 3V6657 Hydraulic Arrangement listed on Page 208A
3G2640 Pump parts are shown on Page 238B
c316956 SEBP1079
1V4881 PUMP GP-GEAR Parts scheme
  For full view, you need register

Parts for your 988B WHEEL LOADER:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 4D-9835 [2] STUD 97mm(3.82 in.)long  
  4D-3704 [2] WASHER 30mm(1.18 in.)o.d.  
    - OR -
  3D-5963 C [2] STUD 91mm(3.58 in.)long  
  2S-5658 C [2] WASHER 29mm(1.14 in.)o.d.  
2. 5F-3106 [2] SEAL  
3. 1V-4882 C [1] ADAPTER  
4. 3G-2640 YC [1] PUMP GROUP  
    (Separate Illustration)
5. 1D-4720 [2] NUT  
  C   INDICATES CHANGE
  Y   SEPARATE ILLUSTRATION
 

#SEBP10790794
 

1V-5137: CYLINDER & MOUNTING GP

1V5137 LIFT CYLINDER AND MOUNTING GROUP
Serial No. 50W5502 to 50W5580 inclusive
1U4679 Cylinder parts are shown on Page 236B
c180554 SEBP1079
1V5137 CYLINDER & MOUNTING GP Parts scheme
  For full view, you need register

Parts for your 988B WHEEL LOADER:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. YC [2] CYLINDER GROUP  
    (Separate Illustration)
2. 6V-1749 [2] BOLT  
  3K-9770 [2] NUT  
3. 5V-8417 [4] COLLET  
4. 4V-2115 [2] PIN  
5. 3B-8489 [2] FITTING  
6. 7K-9218 [4] SEAL  
7. 4K-0684 [4] WASHER  
  C   INDICATES CHANGE
  Y   SEPARATE ILLUSTRATION
 

#SEBP10790795
 

3G-2640: PUMP GP-GEAR

3G2640 GEAR PUMP GROUP
Part of 1V4881 Gear Pump Group shown on Page 238A
c210730 SEBP1079
3G2640 PUMP GP-GEAR Parts scheme
  For full view, you need register

Parts for your 988B WHEEL LOADER:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 7M-4248 [4] STUD  
2. 1B-4207 [8] NUT  
  6H-0190 [8] WASHER  
3. 2A-3586 [4] STUD  
4. 3G-1798 [1] SPACER  
5. 3G-1797 [2] SEAL  
6. 9J-9841 [1] PLUG  
    THE FOLLOWING REPAIR KIT IS AVAILABLE:
  3G-1864 [1] KIT (seal)  
 

#SEBP10790796
 

1V-5137: CYLINDER & MOUNTING GP

1V5137 LIFT CYLINDER AND MOUNTING GROUP
Serial No. 50W5581-Up
8J5779 Cylinder parts are shown on Page 236A
c180555 SEBP1079
1V5137 CYLINDER & MOUNTING GP Parts scheme
  For full view, you need register

Parts for your 988B WHEEL LOADER:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 8J-5779 CY [1] CYLINDER GROUP  
    (Separate Illustration)
2. 6V-1749 [2] BOLT  
  3K-9770 [2] NUT  
3. 5V-8417 [4] COLLET  
4. 4V-2115 [2] PIN  
5. 3B-8489 [2] FITTING  
6. 7K-9218 [4] SEAL  
7. 4K-0684 [4] WASHER  
  C   INDICATES CHANGE
  Y   SEPARATE ILLUSTRATION
 

#SEBP10790797
 

9J-4142: VALVE GP

9J4142 PILOT CONTROL VALVE GROUP--Tilt & Lift
Part of 1V4903 Hydraulic Control Group shown on Page 240
9J4138 and 9J4944 Valve parts are shown on Page 242
c209500 SEBP1079
9J4142 VALVE GP Parts scheme
  For full view, you need register

Parts for your 988B WHEEL LOADER:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 9S-8004 [1] PLUG-O-RING  
  3J-1907 [1] SEAL  
2. 9J-3892 [1] MANIFOLD-INLET  
3. 3D-2992 [3] SEAL  
4. 9S-8003 [1] PLUG-O-RING  
  1J-9671 [1] SEAL-O-RING  
5. 4D-9986 [6] SEAL-O-RING  
6. 9J-4944 Y [1] VALVE GP-PILOT  
7. 9J-4138 Y [1] VALVE GP-PILOT  
8. 9S-8002 [1] PLUG-O-RING  
  3J-7354 [1] SEAL-O-RING  
9. 3H-3243 [3] BOLT  
  3B-4505 [3] LOCKWASHER  
10. 9J-3891 [1] MANIFOLD-OUTLET  
11. 7B-3028 [1] SCREW-DRIVE  
  Y   SEPARATE ILLUSTRATION
 

#SEBP10790798
 

1V-4903: HYDRAULIC CONTROL GROUP

1V4903 HYDRAULIC CONTROL GROUP--Pilot Operated--Part 1 of 2
Serial No. 50W1 to 50W1282 inclusive
9J4142 Valve parts are shown on Page 239
c170224 SEBP1079
1V4903 HYDRAULIC CONTROL GROUP Parts scheme
  For full view, you need register

Parts for your 988B WHEEL LOADER:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 2P-1279 [5] NUT  
2. 2P-7215 C [5] ELBOW  
3. 1V-9721 [5] HOSE ASSEM. 76.2 cm(30 in.)  
4. 0L-1351 [4] BOLT  
  4B-4278 [4] WASHER  
5. 3B-4506 [8] LOCKWASHER  
6. 0L-1466 [2] SPRING  
  2D-6414 [4] WASHER  
7. 7M-0706 [2] KNOB  
8. 1V-8222 [2] LEVER ASSEM.  
9. 2V-2416 [1] BRACKET ASSEM.  
    (Includes)
10. 9F-2978 [4] NUT  
11. 1V-8223 [2] SPACER  
12. 2H-3903 [1] SCREW  
13. 1V-8224 [1] SHAFT  
14. 0S-0509 [4] BOLT  
15. 9J-4142 Y [1] VALVE GROUP  
    (Separate Illustration)
16. 1V-9724 [2] HOSE ASSEM. 86.4 cm(34.01 in.)  
17. 005-4173 [1] ELBOW  
  2M-9780 [1] SEAL  
18. 8M-0505 [1] CONNECTOR  
  3K-0360 [1] SEAL  
19. 2P-2204 [2] ELBOW  
20. 7F-2050 [2] NUT  
21. 2R-6806 [5] CONNECTOR  
  3J-1907 [5] SEAL  
22. 8K-8604 [2] BOOT  
  C   INDICATES CHANGE
  Y   SEPARATE ILLUSTRATION
 

#SEBP10790799
 

1V-4903: HYDRAULIC CONTROL GROUP

1V4903 HYDRAULIC CONTROL GROUP--Pilot Operated--Part 2 of 2
Serial No. 50W1 to 50W1282 inclusive
c209795 SEBP1079
1V4903 HYDRAULIC CONTROL GROUP Parts scheme
  For full view, you need register

Parts for your 988B WHEEL LOADER:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 4B-3057 [4] PIN  
2. 3B-4607 [6] COTTER PIN  
3. 5P-0537 [2] WASHER  
4. 7B-5005 [2] END  
5. 6F-0612 [6] NUT  
6. 3F-7674 [3] NUT  
7. 1V-8225 [2] ROD  
8. 9L-2685 [2] JOINT  
9. 1B-4201 [4] NUT  
  3B-4504 [4] LOCKWASHER  
10. 2H-3903 [1] SCREW  
11. 1V-8228 [1] SHAFT  
  1V-8230 [1] SPACER  
  9K-4848 [4] WASHER  
12. 1V-9371 [2] LEVER ASSEM.  
13. 1V-9240 [2] ROLLER  
14. 5K-5697 [2] SPRING  
15. 0S-1570 [4] BOLT  
16. 1V-8229 [2] SOLENOID  
17. 1B-4427 [4] NUT  
18. 033-3044 [2] BOLT  
19. 2M-4036 [2] END  
20. 9S-1303 [2] PIN  
21. 1V-8227 [2] LINK  
22. 8H-9620 [2] WASHER  
23. 9L-9038 [4] NUT  
 

Information:

Caterpillar Parts SIS Catalog 988B :

PUMP GP-GEAR
1V-5143 PUMP GP-GEAR
CYLINDER & MOUNTING GP
1V-5137 CYLINDER & MOUNTING GP
LIFT CYLINDER GROUP
1U-4679 LIFT CYLINDER GROUP
CYLINDER GP
8J-5779 CYLINDER GP
CYLINDER GP
8J-5779 CYLINDER GP
CYLINDER GP-TILT
3G-2976 CYLINDER GP-TILT
CYLINDER GP-TILT
9J-3632 CYLINDER GP-TILT
CYLINDER & MOUNTING GP
1V-5136 CYLINDER & MOUNTING GP
PUMP GP-GEAR
9J-0809 PUMP GP-GEAR
CYLINDER & MOUNTING GP
1V-5137 CYLINDER & MOUNTING GP
PUMP GP-GEAR
1V-4881 PUMP GP-GEAR
CYLINDER & MOUNTING GP
1V-5137 CYLINDER & MOUNTING GP
PUMP GP-GEAR
3G-2640 PUMP GP-GEAR
CYLINDER & MOUNTING GP
1V-5137 CYLINDER & MOUNTING GP
VALVE GP
9J-4142 VALVE GP
HYDRAULIC CONTROL GROUP
1V-4903 HYDRAULIC CONTROL GROUP

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Italy
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