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8J8747 BASIC GEAR PUMP GROUP (7J8311 N/S) Serial No. 87A6832 & 87A6868 to 87A9318 inclusive 988 WHEEL LOADER


BRAKING SYSTEM
PUMP GP
STEERING SYSTEM
CYLINDER GP
VALVE GP
BRAKING SYSTEM
VALVE GP
STEERING SYSTEM
STEERING GEAR GP

WHEEL LOADER 988 WHEEL LOADER 87A
 988 WHEEL LOADER 87A06832-06832 (MACHINE) UEG0881S 988 87A   (1965)

BRAKING SYSTEM

PUMP GP
GEAR PUMP GROUP
8J-8751 GEAR PUMP GROUP
BASIC GEAR PUMP GROUP
8J-8747 BASIC GEAR PUMP GROUP
BASIC GEAR PUMP GROUP
9J-8769 BASIC GEAR PUMP GROUP
 

#UEG0881S0320
 

8J-8747: BASIC GEAR PUMP GROUP

8J8747 BASIC GEAR PUMP GROUP (7J8311 N/S)
Serial No. 87A6832 & 87A6868 to 87A9318 inclusive
c146614 UEG0881S
8J8747 BASIC GEAR PUMP GROUP Parts scheme
  For full view, you need register

Parts for your 988 WHEEL LOADER:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 7J-8313 H [1] ADAPTER  
2. 5F-3106 H [2] SEAL  
3. 7J-4771 [1] RING  
4. 7J-4772 [1] COUPLING  
5. 7J-4625 [8] STUD  
  8H-5724 [8] NUT  
  6J-2391 [8] WASHER  
6. 0S-1566 H [2] BOLT  
  4B-4281 H [2] WASHER  
7. 7J-8902 H [2] BOLT  
    THE FOLLOWING REPAIR KITS ARE AVAILABLE:
  8J-9239 [1] KIT (Seal)  
    (Consists of Seals, Plates & Retainer)
  8J-9238 [1] KIT (Front-Gear Pump)  
  8J-8364 [1] KIT (Rear-Gear Pump)  
  H   NOT PART OF 8J8747 PUMP GROUP
 

#UEG0881S0321
 

9J-8769: BASIC GEAR PUMP GROUP

9J8769 BASIC GEAR PUMP GROUP (7J8311 N/S)
Serial No. 87A9319-Up
c157716 UEG0881S
9J8769 BASIC GEAR PUMP GROUP Parts scheme
  For full view, you need register

Parts for your 988 WHEEL LOADER:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 7J-8313 H [1] ADAPTER  
2. 5F-3106 H [2] SEAL  
3. 7J-4771 [1] RING  
4. 7J-4772 [1] COUPLING  
5. 5P-5069 [8] STUD  
  8H-5724 [8] NUT  
  6J-2391 [8] WASHER  
6. 0S-1566 H [2] BOLT  
  4B-4281 H [2] WASHER  
7. 7J-8902 H [2] BOLT  
8. 9J-9841 C [1] PLUG  
    THE FOLLOWING REPAIR KITS ARE AVAILABLE:
    (Consists of Seals, Plates, & Retainer)
  9J-9287 [1] KIT (front-gear pump)  
  8J-8364 [1] KIT (rear-gear pump)  
  H   NOT PART OF 9J8769 PUMP GROUP
 

#UEG0881S0322
 

7J-9718: STEERING CYLINDER GROUP

7J9718 STEERING CYLINDER GROUP (7K9401 N/S) (Chg. 1 & 2)--5" Bore x 28.80" Stroke--2 Required
c203604 UEG0881S
7J9718 STEERING CYLINDER GROUP Parts scheme
  For full view, you need register

Parts for your 988 WHEEL LOADER:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
  7J-9715 [1] ROD ASSEM.  
  4J-3420 [1] RING  
  4J-3348 [1] PISTON  
  5P-0094 H [2] SEAL  
  7J-9708 [1] BEARING  
    (PART OF 7J9717 ASSEM.)
  2J-3950 [1] NUT  
  7J-9717 [1] CYLINDER ASSEM.  
  5J-5020 [1] SEAL ASSEM.  
  5F-3144 [1] SEAL  
  2K-4096 [1] RING  
  5J-3616 [1] SEAL  
  5J-8225 [1] SEAL  
  4J-3515 [1] SEAL  
  7J-9708 [1] BEARING  
    (PART OF 7J9715 ASSEM.)
  5P-0094 H [2] SEAL  
  1A-8063 [4] BOLT  
  3B-4512 [4] LOCKWASHER  
  9J-2043 [1] HEAD  
  H   NOT PART OF 7J9718 CYLINDER GR
 

#UEG0881S0323
 

8J-7373: STEERING VALVE GROUP

8J7373 STEERING VALVE GROUP--Part 1 of 2
Serial No. 87A6832 and 87A6868 to 87A8733 inclusive
Part of 1V1459 Steering Mechanism shown on Page 165
c116604 UEG0881S
8J7373 STEERING VALVE GROUP Parts scheme
  For full view, you need register

Parts for your 988 WHEEL LOADER:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 6J-7244 [1] PLUG  
2. 4J-0525 [2] SEAL  
3. 6J-7245 [1] SPACER  
4. 6J-1311 [1] ROD  
5. 2J-6088 [1] SPRING (Inner)  
6. 6J-7240 [1] SPRING (Outer)  
7. 6J-0428 [1] SEAT  
8. 4J-0524 [1] SEAL  
9. 1J-8497 [1] VALVE  
10. 4J-9535 [1] SEAL  
11. 4F-7115 [1] SPRING  
12. 9S-4187 [1] PLUG  
13. 3K-0360 [1] SEAL  
14. 3J-7473 [1] SHIM (.005 in. thick)  
  3H-2549 [7] SHIM (.010 in. thick)  
15. 4J-0528 [3] SEAL  
16. 6J-0891 [1] RETAINER  
17. 6J-0892 H [1] BOLT  
18. 3B-4508 H [1] LOCKWASHER  
19. 8M-4791 H [1] WASHER  
20. 5J-4697 [1] SPRING  
21. 6J-0890 H [1] RETAINER  
22. 6J-0889 [1] WASHER  
23. 3J-9697 H [6] SHIM  
24. 1P-4579 H [2] FLANGE  
25. 7B-3235 H [4] BOLT  
26. 6J-0429 [1] PILOT  
27. 2J-8333 [1] SEAL  
28. 3J-1907 [1] SEAL  
  6J-7242 [1] BODY GROUP  
    (Consists of parts marked h in both Part 1 and Part 2)
 

#UEG0881S0324
 

8J-7373: STEERING VALVE GROUP

8J7373 STEERING VALVE GROUP--Part 2 of 2
Serial No. 87A6832 and 87A6868 to 87A8733 inclusive
Part of 1V1459 Steering Mechanism shown on Page 165
c116605 UEG0881S
8J7373 STEERING VALVE GROUP Parts scheme
  For full view, you need register

Parts for your 988 WHEEL LOADER:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 6J-0434 [1] COVER  
2. 9S-8001 H [3] PLUG  
3. 4J-7533 H [3] SEAL  
4. 9S-4185 H [1] PLUG  
5. 3K-0360 H [1] SEAL  
6. 4B-9782 H [1] BALL  
7. 8J-0507 H [1] SEAT  
8. 9S-4191 [1] PLUG  
9. 3J-1907 [1] SEAL  
10. 7J-8066 H [1] SEAT  
11. 1J-9671 H [1] SEAL  
12. 0S-1587 [7] BOLT  
13. 3B-4508 [12] LOCKWASHER  
14. 0S-1573 [2] BOLT  
15. 6J-7246 [1] GUIDE  
16. 6J-0427 [2] SPACER  
17. 6J-0433 [1] COVER  
18. 9S-8008 [1] PLUG  
19. 3D-2824 [1] SEAL  
20. 3J-1907 H [1] SEAL  
21. 7B-3028 [1] SCREW (Drive)  
22. 4J-9535 [2] SEAL  
23. 2B-0947 [3] BOLT  
  6J-7242 [1] BODY GROUP  
    (Consists of parts marked h in both Part 2 and Part 1)
 

#UEG0881S0325
 

8J-7373: STEERING VALVE GROUP

8J7373 STEERING VALVE GROUP--Part 1 of 2
Serial No. 87A8734-Up
Part of 1V1459 Steering Mechanism Group shown on Page 165
9J8225 Valve parts are shown on Page 163B
c157813 UEG0881S
8J7373 STEERING VALVE GROUP Parts scheme
  For full view, you need register

Parts for your 988 WHEEL LOADER:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 6J-7244 [1] PLUG  
2. 4J-0525 [1] SEAL  
3. 6J-7245 [1] SPACER  
4. 6J-1311 [1] ROD  
5. 2J-6088 [1] SPRING (Inner)  
6. 6J-7240 [1] SPRING (Outer)  
7. 9J-8225 YC [1] VALVE GROUP  
    (Separate Illustration)
8. 4J-0524 [1] SEAL  
10. 4J-9535 [1] SEAL  
11. 4F-7115 [1] SPRING  
12. 9S-4187 [1] PLUG  
13. 3K-0360 [1] SEAL  
14. 3J-7473 [1] SHIM .127 mm(.005 in.) thick  
  3H-2549 [1] SHIM .254 mm(.010 in.) thick  
15. 4J-0528 [3] SEAL  
16. 6J-0891 [1] RETAINER  
17. 6J-0892 H [1] BOLT  
18. 3B-4508 H [1] LOCKWASHER  
19. 8M-4791 H [1] WASHER  
20. 5J-4697 [1] SPRING  
21. 6J-0890 H [1] RETAINER  
22. 6J-0889 [1] WASHER  
23. 3J-9697 H [6] SHIM  
24. 1P-4579 H [2] FLANGE  
25. 7B-3235 H [4] BOLT  
26. 6J-0429 [1] PILOT  
27. 2J-8333 [1] SEAL  
28. 3J-1907 [1] SEAL  
  6J-7242 [1] BODY GROUP  
    (Consists of parts marked h in both Part 1 and Part 2)
  C   INDICATES CHANGE
  Y   SEPARATE ILLUSTRATION
 

#UEG0881S0326
 

8J-7373: STEERING VALVE GROUP

8J7373 STEERING VALVE GROUP--Part 2 of 2
Serial No. 87A8734-Up
Part of 1V1459 Steering Mechanism Group shown on Page 165
c116605 UEG0881S
8J7373 STEERING VALVE GROUP Parts scheme
  For full view, you need register

Parts for your 988 WHEEL LOADER:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 6J-0434 [1] COVER  
2. 9S-8001 H [3] PLUG  
3. 4J-7533 H [3] SEAL  
4. 9S-4185 H [1] PLUG  
5. 3K-0360 H [1] SEAL  
6. 4B-9782 H [1] BALL  
7. 8J-0507 H [1] SEAT  
8. 9S-4191 [1] PLUG  
9. 3J-1907 [1] SEAL  
10. 7J-8066 H [1] SEAT  
11. 1J-9671 H [1] SEAL  
12. 0S-1587 [7] BOLT  
13. 3B-4508 [12] LOCKWASHER  
14. 0S-1573 [2] BOLT  
15. 6J-7246 [1] GUIDE  
16. 6J-0427 [2] SPACER  
17. 6J-0433 [1] COVER  
18. 9S-8008 [1] PLUG  
19. 3D-2824 [1] SEAL  
20. 3J-1907 H [1] SEAL  
21. 7B-3028 [1] SCREW (Drive)  
22. 4J-9535 [2] SEAL  
23. 2B-0947 [3] BOLT  
  6J-7242 [1] BODY GROUP  
    (Consists of parts marked h in both Part 2 and Part 1)
 

#UEG0881S0327
 

9J-8225: VALVE GP

9J8225 VALVE GROUP
Serial No. 87A8734-Up
Part of 8J7373 Steering Valve Group shown on Page 162B
c208299 UEG0881S
9J8225 VALVE GP Parts scheme
  For full view, you need register

Parts for your 988 WHEEL LOADER:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 1J-8497 [1] VALVE  
2. 6J-0428 [1] SEAT-PILOT  
 

#UEG0881S0328
 

1V-1459: STEERING MECHANISM GROUP

1V1459 STEERING MECHANISM GROUP--Part 1 of 3
Serial No. 87A6832 & 87A6868 to 87A9026 and 87A9028 to 87A9077 inclusive
c153570 UEG0881S
1V1459 STEERING MECHANISM GROUP Parts scheme
  For full view, you need register

Parts for your 988 WHEEL LOADER:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 3K-5461 [1] WHEEL  
2. 5F-5442 [4] SCREW  
3. 4D-0874 [1] COVER  
4. 2H-9458 [1] GASKET  
5. 2K-9096 [1] SPINNER ASSEM.  
6. 1D-5120 [1] NUT  
7. 4K-9775 [1] NUT  
  3B-1417 [1] RING  
8. 5K-9764 [1] NUT  
9. 7S-2075 [1] SHAFT ASSEM.  
10. 2H-4246 [1] BEARING  
11. 4L-6942 [1] SEAL  
12. 1A-2029 [1] BOLT  
13. 5F-6445 [1] LEVER  
14. 7S-2114 [1] SHAFT  
15. 1B-8706 [2] KEY  
16. 6K-7752 [1] HOUSING ASSEM.  
    (Includes)
17. 4F-6292 [2] BEARING  
18. 7M-8930 [1] SEAL  
19. 3B-4518 [2] LOCKWASHER  
20. 0L-0702 [2] NUT  
21. 7K-6260 [1] SHAFT  
22. 1B-8722 [2] KEY  
23. 7S-2156 [1] LEVER  
24. 1A-1460 [6] BOLT  
25. 3B-4508 [6] LOCKWASHER  
26. 6H-3977 [1] SEAL  
27. 7K-6023 [1] HOUSING ASSEM.  
    (Includes)
28. 7F-9559 [1] BUSHING  
29. 7F-9558 [1] BUSHING  
30. 6B-5262 [1] PLUG  
31. 6K-5551 [1] GASKET  
32. 4K-9808 [1] LEVER  
33. 1D-5118 [1] NUT  
  0L-1213 [2] GASKET  
34. 7K-0903 [1] NUT  
35. 6K-5550 [1] SCREW  
36. 0S-1571 [1] BOLT  
  1D-4717 [1] NUT  
37. 7B-0280 [1] SEAL  
38. 4D-8142 C [1] WASHER  
  C   INDICATES CHANGE
 

#UEG0881S0329
 

1V-1459: STEERING MECHANISM GROUP

1V1459 STEERING MECHANISM GROUP--Part 2 of 3
Serial No. 87A6832, 87A6868 to 87A9026 & 87A9028 to 87A9077 inclusive
8J7373 Valve parts are shown on Pages 162 and 163
c200637 UEG0881S
1V1459 STEERING MECHANISM GROUP Parts scheme
  For full view, you need register

Parts for your 988 WHEEL LOADER:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 0S-1594 [8] BOLT  
2. 3B-4506 [20] LOCKWASHER  
3. 7F-1621 [1] SECTOR  
4. 7K-0167 [1] NUT  
5. 5F-8000 [1] SEAL  
6. 0S-1588 [6] BOLT  
7. 2B-7409 [1] PLUG  
8. 1V-1302 [1] COLUMN ASSEM.  
    (Includes)
9. 1F-2417 [1] BOSS  
10. 7F-9557 [1] BEARING  
11. 4K-9608 [1] SHAFT  
12. 4K-9612 [1] SPACER  
13. 4K-4490 [1] NUT  
  5K-1556 [1] RING  
14. 7F-8267 [1] SEAL  
15. 4K-9845 [1] RETAINER ASSEM.  
    (Includes)
16. 7F-9557 [1] BEARING  
17. 4K-9604 [1] WASHER  
18. 7K-1809 [1] COVER  
19. 4K-9605 [1] NUT  
  4K-9603 [1] RING  
20. 0L-1143 [6] BOLT  
21. 1H-8720 [1] SEAL  
22. 7K-0114 [2] RING  
23. 2B-7457 [1] PLUG  
24. 7K-1755 [1] COVER ASSEM.  
  5F-5552 [1] GASKET  
25. 1A-7669 [3] BOLT  
26. 3B-4508 [3] LOCKWASHER  
27. 8J-7373 Y [1] VALVE GROUP  
    (Separate Illustration)
28. 9K-0380 [1] PLATE  
29. 1A-1135 [3] BOLT  
  3B-4510 [3] LOCKWASHER  
30. 7S-2150 [1] ARM ASSEM.  
    (Includes)
31. 2B-2994 [2] DOWEL  
32. 4K-0484 [1] KEY  
  Y   SEPARATE ILLUSTRATION
 

Information:

Special Instruction
Nexus Gear Pump Porting{5073}
Nexus Gear Pump Porting{5073}
Repair Process for Hydraulic Gear Pumps {5073}
Repair Process for Hydraulic Gear Pumps {5073}
Vane Type Hydraulic Pump Identification Guidelines {5055}
Vane Type Hydraulic Pump Identification Guidelines {5055}
Tool Operating Manual
Replacing Sleeve Bearings in Tyrone Gear Pumps and Motors (Used on Series 7 and 8, Iron and Aluminum Housings){0738, 5061, 5073, 7551}
Replacing Sleeve Bearings in Tyrone Gear Pumps and Motors (Used on Series 7 and 8, Iron and Aluminum Housings){0738, 5061, 5073, 7551}
Reuse And Salvage Guidelines
Repair Process for Hydraulic Gear Pumps {5073}
Repair Process for Hydraulic Gear Pumps {5073}
Specifications and Reusability for Hydraulic Gear Pumps and Motors (Groups 1, 2, and 3) {5061, 5073}
Specifications and Reusability for Hydraulic Gear Pumps and Motors (Groups 1, 2, and 3) {5061, 5073}
Specifications and Reusability for Hydraulic Gear Pumps and Motors (Groups 4, 5, and 6) {5061, 5073}
Specifications and Reusability for Hydraulic Gear Pumps and Motors (Groups 4, 5, and 6) {5061, 5073}
Removing and Installing Bushings and Pressure Plates in Hydraulic Gear Pumps {5073}
Removing and Installing Bushings and Pressure Plates in Hydraulic Gear Pumps {5073}
Vane Type Hydraulic Pump Identification Guidelines {5055}
Vane Type Hydraulic Pump Identification Guidelines {5055}
General Reuse and Salvage Guideline for Hydraulic Piston Pumps and Motors {5058, 5070}
General Reuse and Salvage Guideline for Hydraulic Piston Pumps and Motors {5058, 5070}
Bench Test Procedures
Bench Test Procedure for Gear Pumps {5073}
Bench Test Procedure for Gear Pumps {5073}
Bench Test Procedure for Hydraulic Piston Pumps {4268, 4306, 5070}
Bench Test Procedure for Hydraulic Piston Pumps {4268, 4306, 5070}
Service Magazine
Serviceable Piece Parts And Service Tools Are Available For Tyrone TP20 Series Tandem Gear Pumps{5073,0600}
1984/10/22

Caterpillar Parts SIS Catalog 988 :

GEAR PUMP GROUP
8J-8751 GEAR PUMP GROUP
VALVE GP-DIVERTER
8J-1708 VALVE GP-DIVERTER
SUPPLEMENTAL STEERING LINES GROUP
9K-9009 SUPPLEMENTAL STEERING LINES GROUP
SUPPLEMENTAL STEERING LINES GROUP
9K-9009 SUPPLEMENTAL STEERING LINES GROUP
1V-0175 SUPPLEMENTAL STEERING ARRANGEMENT
FILTER GROUP
8J-3586 FILTER GROUP
FILTER GROUP
8J-3586 FILTER GROUP
STEERING LINES GROUP
8K-0030 STEERING LINES GROUP
BASIC GEAR PUMP GROUP
9J-8769 BASIC GEAR PUMP GROUP
STEERING CYLINDER GROUP
7J-9718 STEERING CYLINDER GROUP
STEERING VALVE GROUP
8J-7373 STEERING VALVE GROUP
STEERING VALVE GROUP
8J-7373 STEERING VALVE GROUP
STEERING VALVE GROUP
8J-7373 STEERING VALVE GROUP
STEERING VALVE GROUP
8J-7373 STEERING VALVE GROUP
VALVE GP
9J-8225 VALVE GP
STEERING MECHANISM GROUP
1V-1459 STEERING MECHANISM GROUP

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