1P4220 SCAVENGE GEAR PUMP GROUP -- Single Section IF TRANSMISSION IS SERIALIZED USE TRANSMISSION SERIAL NO. OTHERWISE USE VEHICLE SERIAL NO. Serial No. 26W1 to 26W491 inclusive & 27W1 to 27W1329 inclusive. Transmission Serial No. 1PA1-Up. Part of 3P5856 & 7G4992 Transmission Arrangements shown on Pages 112B, 113 and 113B 637D



POWER TRAIN
PUMP GP
CONTROL GP-DIFFERENTIAL LOCK
DIFFERENTIAL & BEVEL GEAR GP

WHEEL TRACTOR 637D WHEEL TRACTOR 26W
 637D TRACTORS 26W00001-UP (MACHINE) POWERED BY 3408 ENGINE SEBP1058 637D 26W   (1975)

POWER TRAIN

PUMP GP
GOV, FUEL INJ & TFR PUMP GP
1W-0413 GOV, FUEL INJ & TFR PUMP GP
GOV, FUEL INJ & TFR PUMP GP
1W-0413 GOV, FUEL INJ & TFR PUMP GP
GOV, FUEL INJ & TFR PUMP GP
2W-8961 GOV, FUEL INJ & TFR PUMP GP
PUMP GP-FUEL TRANSFER
4N-1101 PUMP GP-FUEL TRANSFER
PUMP GP-FLYWHEEL SCAVENGE GEAR
9D-2100 PUMP GP-FLYWHEEL SCAVENGE GEAR
PUMP GP-GEAR
2P-9313 PUMP GP-GEAR
PUMP GP-GEAR
1P-4220 PUMP GP-GEAR
PUMP GP-TRANSMISSION
7S-4577 PUMP GP-TRANSMISSION
 

#SEBP10580580
 

1P-4220: PUMP GP-GEAR

1P4220 SCAVENGE GEAR PUMP GROUP -- Single Section
IF TRANSMISSION IS SERIALIZED USE TRANSMISSION SERIAL NO. OTHERWISE
USE VEHICLE SERIAL NO. Serial No. 26W1 to 26W491 inclusive & 27W1 to 27W1329
inclusive. Transmission Serial No. 1PA1-Up. Part of 3P5856 & 7G4992
Transmission Arrangements shown on Pages 112B, 113 and 113B
c205135 SEBP1058
1P4220 PUMP GP-GEAR Parts scheme
  For full view, you need register

Parts for your 637D WHEEL TRACTOR:

Pos. Part No Qty Parts name Comments
1. 0L-1352 C [2] BOLT  
2. 3S-0004 [6] WASHER  
3. 1P-4219 [1] BODY AS-OIL PUMP  
4. 1M-3735 [4] DOWEL  
5. 3S-1340 [1] BASE AS-OIL PUMP  
6. 1M-3780 [2] BEARING  
7. 1P-4224 [1] GEAR AS-OIL PUMP (12 TEETH-IDLER)  
8. 1P-4221 [1] GEAR AS-OIL PUMP (12 TEETH-DRIVE)  
9. 8F-9516 [2] SEAL-O-RING  
10. 9S-4191 [1] PLUG-O-RING  
  3J-1907 [1] SEAL  
11. 2S-1454 [1] COVER AS-PUMP  
12. 1M-3780 [2] BEARING  
13. 0S-1619 [4] BOLT  
  C   CHANGE FROM PREVIOUS TYPE
 

#SEBP10580581
 

7S-4577: PUMP GP-TRANSMISSION

7S4577 TRANSMISSION OIL PUMP GROUP
IF TRANSMISSION IS SERIALIZED USE TRANSMISSION SERIAL NO. OTHERWISE
USE VEHICLE SERIAL NO. Serial No. 26W1 to 26W491 inclusive & 27W1 to 27W1329
inclusive. Transmission Serial No. 1PA1-Up. Part of 3P5856 & 7G4992
Transmission Arrangements shown on Pages 112B, 113 and 113B
c150428 SEBP1058
7S4577 PUMP GP-TRANSMISSION Parts scheme
  For full view, you need register

Parts for your 637D WHEEL TRACTOR:

Pos. Part No Qty Parts name Comments
1. 6P-0103 C [1] COVER AS-PUMP  
2. 5M-3320 [2] BEARING  
3. 2D-8009 C [2] SEAL-O-RING  
4. 7S-4579 [1] GEAR AS-OIL PUMP (12 TEETH DRIVE)  
5. 1P-0634 [1] GEAR AS-OIL PUMP (12 TEETH IDLER)  
6. 0T-0573 [4] BOLT  
7. 3S-0004 [6] WASHER  
8. 7S-6978 C [1] COVER AS-PUMP  
9. 5M-3320 [2] BEARING  
10. 0S-1619 [2] BOLT  
11. 1S-5632 [1] BODY AS-OIL PUMP  
  8M-8489 [4] DOWEL  
  C   CHANGE FROM PREVIOUS TYPE
 

#SEBP10580582
 

5D-0470: VALVE GP-QUICK RELEASE

5D470 QUICK RELEASE VALVE ASSEMBLY
Part of 9D3780 Differential Lock Control and 9D3620 & 6G1510 Service Brake Control
Groups shown on Pages 127, 127A, 127B, 135, 137B, 137F, 137K, 137P and 137T
c90528 SEBP1058
5D0470 VALVE GP-QUICK RELEASE Parts scheme
  For full view, you need register

Parts for your 637D WHEEL TRACTOR:

Pos. Part No Qty Parts name Comments
  4B-1321 [4] SCREW  
  5D-0863 [1] DIAPHRAGM  
  5D-5716 [1] SEAL  
 

#SEBP10580583
 

9D-3780: CONTROL GP-DIFFERENTIAL LOCK

9D3780 DIFFERENTIAL LOCK CONTROL GROUP
Serial No. 26W1 to 26W388 inclusive and 27W1 to 27W664 inclusive
6D856 and 5D470 Valve parts are shown on Pages 105 and 126
c161031 SEBP1058
9D3780 CONTROL GP-DIFFERENTIAL LOCK Parts scheme
  For full view, you need register

Parts for your 637D WHEEL TRACTOR:

Pos. Part No Qty Parts name Comments
1. 6D-9853 [1] HOSE ASSEM. 25.40 cm(10 in.)  
2. 5H-4778 C [3] UNION  
3. 4J-3914 [1] UNION  
4. 1A-9136 [2] BOLT  
  3B-4505 [2] LOCKWASHER  
5. 5M-6213 [1] PLUG  
6. 5D-0470 Y [1] VALVE ASSEM.  
    (Separate Illustration)
7. 4D-1544 C [1] CLIP  
  0S-0509 [1] BOLT  
8. 3B-4506 [4] LOCKWASHER  
9. 3D-7587 C [1] UNION  
10. 9M-8662 [1] COUPLING  
11. 2J-3118 [1] BOLT  
12. 8D-6890 [1] PEDAL  
13. 8D-3372 [1] PIN  
  3B-4607 [1] COTTER PIN  
14. 8D-6891 [1] BRACKET  
15. 8L-5202 [1] BOLT  
  1B-2578 [1] NUT  
16. 5M-9708 [1] SPRING  
17. 1A-2029 [3] BOLT  
18. 6D-0856 Y [1] VALVE ASSEM.  
    (Separate Illustration)
19. 2G-3524 [1] TUBE ASSEM.  
  5K-9246 [2] CONNECTOR  
20. 3D-8942 [1] HOSE ASSEM. 79.37 cm(31.25 in.)  
21. 7D-3963 [1] HOSE ASSEM. 29.95 cm(114 in.)  
22. 6B-5072 [1] BUSHING  
23. 4B-4278 C [1] WASHER  
  C   INDICATES CHANGE
  Y   SEPARATE ILLUSTRATION
 

#SEBP10580584
 

9D-3780: CONTROL GP-DIFFERENTIAL LOCK

9D3780 DIFFERENTIAL LOCK CONTROL GROUP
Serial No. 26W389 to 26W395 inclusive and 27W665 to 27W735 inclusive
6D856 and 5D470 Valve parts are shown on Pages 105 and 126
c166878 SEBP1058
9D3780 CONTROL GP-DIFFERENTIAL LOCK Parts scheme
  For full view, you need register

Parts for your 637D WHEEL TRACTOR:

Pos. Part No Qty Parts name Comments
1. 4S-7572 C [1] HOSE ASSEM. 30.48 cm(12 in.)  
2. 5H-4778 C [2] UNION  
3. 4J-3914 [1] UNION  
4. 1A-9136 [2] BOLT  
  3B-4505 [2] LOCKWASHER  
5. 5M-6213 [1] PLUG  
6. 5D-0470 Y [1] VALVE ASSEM.  
    (Separate Illustration)
7. 4D-1544 [1] CLIP  
  0S-0509 [1] BOLT  
8. 3B-4506 [4] LOCKWASHER  
9. 6B-5072 [1] BUSHING  
10. 4B-4278 [1] WASHER  
11. 2J-3118 [1] BOLT  
12. 8D-6890 [1] PEDAL  
13. 8D-3372 [1] PIN  
  3B-4607 [1] COTTER PIN  
14. 8D-6891 [1] BRACKET  
15. 8L-5202 [1] BOLT  
  1B-2578 [1] NUT  
16. 5M-9708 [1] SPRING  
17. 1A-2029 [3] BOLT  
18. 6D-0856 Y [1] VALVE ASSEM.  
    (Separate Illustration)
19. 2G-3524 [1] TUBE ASSEM.  
  5K-9246 [2] CONNECTOR  
20. 7D-3963 HOSE ASSEM. 29.95 cm(114 in.)  
  C   INDICATES CHANGE
  Y   SEPARATE ILLUSTRATION
 

#SEBP10580585
 

9D-3780: CONTROL GP-DIFFERENTIAL LOCK

9D3780 DIFFERENTIAL LOCK CONTROL GROUP
Serial No. 26W396-Up And 27W736-Up
6D856-Page 105, 5D470-Page 126
c329660 SEBP1058
9D3780 CONTROL GP-DIFFERENTIAL LOCK Parts scheme
  For full view, you need register

Parts for your 637D WHEEL TRACTOR:

Pos. Part No Qty Parts name Comments
1. 4S-7572 C [1] HOSE AS  
2. 5H-4778 C [2] ELBOW-EXTERNAL PIPE THREAD  
3. 4J-3914 C [1] ELBOW  
4. 1A-9136 [2] BOLT  
  3B-4505 [2] LOCKWASHER  
5. 5M-6213 [1] PLUG  
6. 5D-0470 Y [1] VALVE GP-QUICK RELEASE  
7. 4D-1544 C [2] CLIP  
  0S-0509 C [2] BOLT  
8. 3B-4506 [4] LOCKWASHER  
9. 5P-1075 C [1] WASHER-HARD  
10. 4B-4278 [1] WASHER  
11. 2J-3118 [1] BOLT-SELF LOCKING  
12. 8D-6890 [1] PEDAL  
13. 8D-3372 [1] PIN  
  3B-4607 [1] COTTER  
14. 8D-6891 [1] BRACKET  
15. 8L-5202 [1] BOLT  
  1B-2578 [1] NUT  
16. 5M-9708 [1] SPRING  
17. 1A-2029 [3] BOLT  
18. 6D-0856 Y [1] VALVE AS  
19. 2G-2476 C [1] LINES GP-HEATER  
  4H-6147 C [1] CONNECTOR-PIPE  
20. 7D-3963 C [1] HOSE AS  
  C   CHANGE FROM PREVIOUS TYPE
  Y   SEPARATE ILLUSTRATION
 

#SEBP10580586
 

9D-0520: DIFFERENTIAL & BEVEL GEAR GP

9D520 DIFFERENTIAL AND BEVEL GEAR GROUP--Part 1 of 2
Serial No. 26W1 to 26W552 inclusive and 27W1 to 27W1638 inclusive
c303077 SEBP1058
9D0520 DIFFERENTIAL & BEVEL GEAR GP Parts scheme
  For full view, you need register

Parts for your 637D WHEEL TRACTOR:

Pos. Part No Qty Parts name Comments
1. 6V-4463 C [6] BOLT  
2. 2D-9456 [1] LOCK  
3. 3B-4510 [22] LOCKWASHER  
4. 7B-1115 [3] BOLT  
5. 2D-9454 C [1] CUP  
6. 2D-9455 [1] CONE  
7. 5D-7523 [1] SEAL  
8. 6B-4370 [1] CUP  
9. 2D-9453 [1] CONE  
10. 9D-0511 [1] PINION ASSEM.  
    (Includes)
  4F-5695 [1] PLUG  
11. 4F-9029 [1] SEAL 2.97 cm(1.17 in.) I.D.  
  5H-7153 [1] SEAL  
12. 1D-4720 [19] NUT  
13. 9D-6863 [1] CARRIER ASSEM.  
    (Includes)
14. 4D-0537 [2] DOWEL  
15. 3D-5766 [4] STUD  
16. 3D-5692 [4] BUSHING  
17. 1B-4518 [4] NUT  
18. 6G-3406 C [1] HOSE ASSEM. 38.10 cm(15 in.)  
19. 3D-2898 [1] SEAL 4.87 cm(1.92 in.) I.D.  
  4F-7390 [1] SEAL 5.33 cm(2.10 in.) I.D.  
20. 2L-3331 [1] UNION  
21. 6D-7523 [1] TUBE ASSEM.  
22. 9D-7146 [1] TUBE ASSEM.  
23. 5P-0598 [1] CLAMP  
24. 0S-0509 [1] BOLT  
  0L-0364 [1] LOCK  
25. 6D-7491 [1] CLAMP  
26. 5P-1293 J HOSE 30.48 cm(12 in.)  
27. 9F-4446 [2] SEAL  
28. 0S-1621 [1] BOLT  
29. 9K-4454 [1] LOCK  
30. 4D-5289 [1] RING  
31. 9D-4229 [1] NUT  
32. 9D-4231 [1] STOP  
33. 2D-9459 [1] CAGE  
34. 1B-4034 [1] CONE  
35. 4B-8393 [1] CUP  
36. 5P-6628 CH LOCKWIRE 1.17 m(46.06 in.)  
37. 5P-8081 C [36] BOLT  
  5P-8248 C [36] WASHER  
38. 5P-8245 C [6] WASHER  
39. 1M-9565 [1] RING  
40. 7D-4891 [1] SEAL ASSEM.  
41. 6D-7652 [4] SHIM .13 mm(.005 in.) thick  
  6D-7655 [3] SHIM .18 mm(.007 in.) thick  
42. 8F-8861 [1] SEAL  
43. 9D-0514 [1] RETAINER  
44. 9H-6832 [1] SEAL  
45. 2D-8364 [1] SEAL  
  C   INDICATES CHANGE
  H   ORDER BY THE METER
  J   ORDER BY THE CENTIMETER
  Y   SEPARATE ILLUSTRATION
 

#SEBP10580587
 

9D-0520: DIFFERENTIAL & BEVEL GEAR GP

9D520 DIFFERENTIAL AND BEVEL GEAR GROUP--Part 2 of 2
Serial No. 26W1 to 26W552 inclusive and 27W1 to 27W1638 inclusive
8D5610 Differential parts are shown on Page 132
c224410 SEBP1058
9D0520 DIFFERENTIAL & BEVEL GEAR GP Parts scheme
  For full view, you need register

Parts for your 637D WHEEL TRACTOR:

Pos. Part No Qty Parts name Comments
1. 6D-2646 [1] RING  
2. 2D-9459 [1] CAGE  
3. 6D-7422 [4] BOLT  
4. 5P-6628 CH LOCKWIRE .16 m(29.92 in.)  
5. 4F-2041 [1] CUP  
6. 2D-9457 [1] CONE  
7. 6D-7562 [2] BOLT  
  5P-6628 CH LOCKWIRE .23 m(9.06 in.)  
8. 9D-0513 [1] GEAR (51 teeth)  
9. 6D-8434 [1] SEAL  
10. 7D-4892 [1] RING  
11. 7D-4893 [16] SPRING  
12. 033-8248 [1] CLIP  
13. 2S-0635 [2] BOLT  
  5P-6628 CH LOCKWIRE .13 m(5.12 in.)  
14. 7D-6862 [1] JAW  
15. 6D-8329 [1] JAW  
16. 6D-8514 [1] WASHER  
17. 0L-1351 [14] BOLT  
18. 0L-0364 [12] LOCK  
19. 7D-5003 [1] HOUSING ASSEM.  
20. 6D-2718 [2] DOWEL  
21. 2G-1664 [1] HOSE ASSEM. 55.88 cm(22 in.)  
22. 030-6818 [1] UNION  
  3K-0360 [1] SEAL  
23. 7D-4895 [1] CYLINDER  
24. 6D-2658 [1] WASHER  
25. 4D-5293 [1] RING  
26. 6D-5942 [1] SPACER  
27. 6D-2755 [1] SEAL  
28. 7D-4894 [1] PISTON  
29. 8D-5610 Y [1] DIFFERENTIAL GROUP  
    (Separate Illustration)
30. 6D-7651 [1] BRACKET  
31. 3H-3451 [1] LOCK  
32. 0S-1621 [1] BOLT  
33. 2D-9456 [1] LOCK  
34. 6D-2702 [1] LOCK  
  C   INDICATES CHANGE
  H   ORDER BY THE METER
  Y   SEPARATE ILLUSTRATION
 

#SEBP10580588
 

5T-0400: DIFFERENTIAL & BEVEL GEAR GP

5T400 GEAR GP--DIFFERENTIAL & BEVEL--PART 1 OF 2
S/N 26W553-566 & 27W1639-1661
c237163 SEBP1058
5T0400 DIFFERENTIAL & BEVEL GEAR GP Parts scheme
  For full view, you need register

Parts for your 637D WHEEL TRACTOR:

Pos. Part No Qty Parts name Comments
1. 6V-4463 [6] BOLT  
2. 6G-3406 [1] HOSE ASSEM. 38.1 cm(15 in.)  
3. 5P-8247 [22] WASHER  
4. 030-7335 [3] BOLT  
5. 2D-9454 [1] CUP  
6. 2D-9455 [1] CONE  
7. 5D-7523 [1] SEAL  
8. 6B-4370 [1] CUP  
9. 2D-9453 [1] CONE  
10. 9D-0512 [1] PINION  
  4F-5695 [1] PLUG  
11. 4F-9029 [1] SEAL 2.97 cm(1.17 in.) I.D.  
  5H-7153 [1] SEAL  
12. 1D-4720 [19] NUT  
13. 6G-9418 [1] CARRIER ASSEM.  
    (Includes)
14. 4D-0537 [2] DOWEL  
15. 3S-1349 [4] WASHER  
16. 3D-5692 [4] BUSHING  
17. 3B-5753 [4] NUT  
18. 3D-5745 [1] CAP  
19. 3D-2898 [1] SEAL 4.87 cm(1.92 in.) I.D.  
  4F-7390 [1] SEAL 5.33 cm(2.10 in.) I.D.  
20. 2L-3331 [1] UNION  
21. 6D-7523 [1] TUBE ASSEM.  
22. 9D-7146 [1] TUBE ASSEM.  
23. 5P-4868 [1] CLAMP  
24. 5K-9107 [1] BOLT  
25. 6D-7491 [1] CLAMP  
26. 5P-1293 J HOSE 30.48 cm(12 in.)  
27. 9F-4446 [2] SEAL  
28. 6K-7917 [1] BOLT  
29. 9K-4454 [1] LOCK  
30. 4D-5289 [1] RING  
31. 9D-4229 [1] NUT  
32. 9D-4231 [1] STOP  
33. 2D-9459 [1] CAGE  
34. 1B-4034 [1] CONE  
35. 4B-8393 [1] CUP  
36. 2D-8364 [1] SEAL  
37. 5P-8081 [36] BOLT  
  5P-8248 [36] WASHER  
38. 5P-8245 [6] WASHER  
39. 1M-9565 [1] RING  
40. 7D-4891 [1] SEAL ASSEM.  
41. 6D-7652 [4] SHIM .13 mm(.005 in.)thick  
  6D-7655 [3] SHIM .18 mm(.007 in.)thick  
42. 8F-8861 [1] SEAL  
43. 9D-0514 [1] RETAINER  
44. 9H-6832 [1] SEAL  
  J   ORDER BY THE CENTIMETER
 

#SEBP10580589
 

5T-0400: DIFFERENTIAL & BEVEL GEAR GP

5T400 GEAR GP--DIFFERENTIAL & BEVEL--PART 2 OF 2
S/N 26W553-566 & 27W1639-1661
8D5610-Page 132
c335679 SEBP1058
5T0400 DIFFERENTIAL & BEVEL GEAR GP Parts scheme
  For full view, you need register

Parts for your 637D WHEEL TRACTOR:

Pos. Part No Qty Parts name Comments
1. 6D-2646 [1] RING  
2. 2D-9459 [1] CAGE  
3. 0L-1169 [4] BOLT  
4. 5P-8247 [4] WASHER  
5. 4F-2041 [1] CUP  
6. 2D-9457 [1] CONE  
7. 6D-7562 [2] BOLT  
8. 9D-0513 [1] GEAR (51 teeth)  
9. 6D-8434 [1] SEAL  
10. 7D-4892 [1] RING  
11. 7D-4893 [16] SPRING  
12. 033-8248 [1] CLIP  
13. 6D-2702 [1] LOCK  
14. 7D-6862 [1] JAW  
15. 6D-8329 [1] JAW  
16. 6D-8514 [1] WASHER  
17. 030-8535 [14] BOLT  
18. 5M-2894 [14] WASHER  
19. 7D-5003 [1] HOUSING ASSEM.  
    (Includes)
20. 6D-2718 [2] DOWEL  
21. 2G-1664 HOSE ASSEM. 55.88 cm(22 in.)  
22. 030-6818 [1] UNION  
  3K-0360 [1] SEAL  
23. 7D-4895 [1] CYLINDER  
24. 6D-2658 [1] WASHER  
25. 4D-5293 [1] RING  
26. 6D-5942 [1] SPACER  
27. 6D-2755 [1] SEAL  
28. 7D-4894 [1] PISTON  
29. 8D-5610 Y [1] DIFFERENTIAL GROUP  
    (Separate Illustration)
30. 6G-9435 [1] BRACKET  
31. 6K-7917 [1] BOLT  
32. 5P-8245 [1] WASHER  
  Y   SEPARATE ILLUSTRATION
 

Information:

Caterpillar Parts SIS Catalog 637D :

FILTER GP-TRANSMISSION
9P-6447 FILTER GP-TRANSMISSION
TRANSMISSION FILTER GROUP
7S-8630 TRANSMISSION FILTER GROUP
MANIFOLD & SCREENS GP
8S-0660 MANIFOLD & SCREENS GP
MANIFOLD & SCREENS GP
8S-0660 MANIFOLD & SCREENS GP
MANIFOLD & SCREENS GP
8S-0660 MANIFOLD & SCREENS GP
PLANETARY GP
6P-1321 PLANETARY GP
PLANETARY GP
6P-1321 PLANETARY GP
PLANETARY GP
6P-1321 PLANETARY GP
PUMP GP-TRANSMISSION
7S-4577 PUMP GP-TRANSMISSION
VALVE GP-QUICK RELEASE
5D-0470 VALVE GP-QUICK RELEASE
CONTROL GP-DIFFERENTIAL LOCK
9D-3780 CONTROL GP-DIFFERENTIAL LOCK
CONTROL GP-DIFFERENTIAL LOCK
9D-3780 CONTROL GP-DIFFERENTIAL LOCK
CONTROL GP-DIFFERENTIAL LOCK
9D-3780 CONTROL GP-DIFFERENTIAL LOCK
DIFFERENTIAL & BEVEL GEAR GP
9D-0520 DIFFERENTIAL & BEVEL GEAR GP
DIFFERENTIAL & BEVEL GEAR GP
9D-0520 DIFFERENTIAL & BEVEL GEAR GP
DIFFERENTIAL & BEVEL GEAR GP
5T-0400 DIFFERENTIAL & BEVEL GEAR GP

Truck sale:

1979 CAT 637D
Call 
1979 CAT 637D

SEATTLE TRACTOR INT'L
Ravensdale, Washington
1976 CAT 637D
Call 
1976 CAT 637D

SEATTLE TRACTOR INT'L
Ravensdale, Washington
1978 CAT 637D
Call 
1978 CAT 637D

SEATTLE TRACTOR INT'L
Ravensdale, Washington
1978 CAT 637D
Call 
1978 CAT 637D

SEATTLE TRACTOR INT'L
Ravensdale, Washington
1979 CAT 637D
Call 
1979 CAT 637D

SEATTLE TRACTOR INT'L
Ravensdale, Washington