D6M Track-Type Tractor Machine Systems Caterpillar

Disassembly Procedure

Start By:

1. Remove the implement pump. Refer to Disassembly and Assembly, "Implement Pump - Remove" for the machine that is being serviced.

Note: Cleanliness is an important factor. Before the disassembly procedure, the exterior of the component should be thoroughly cleaned. This will help to prevent dirt from entering the internal mechanism.

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Illustration 1	g00717578

1. Remove O-ring seal (1) from pump (2) .

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Illustration 2	g00717580

2. Remove bolts (4) that hold compensator (3) to the pump and remove the compensator.

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Illustration 3	g00717582

3. Remove nut (5), screw (6), guide (7), spring (8), guide (9) and spool (10) from compensator (3) .

4. Remove three seals (11) from the compensator.

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Illustration 4	g00717583

5. Remove backup ring (12) and O-ring seal (13) from guide (7) .

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Illustration 5	g00717584

6. Loosen nut (21) and remove screw (20) from compensator (3) .

7. Remove plug (19), guide (18), spring (16), guide (15) and spool (14) from the compensator.

8. Remove O-ring seal (17) from guide (18) .

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Illustration 6	g00717586

9. Remove three plugs (22) and (23) from the compensator.

10. Remove the O-ring seals from plugs (22) and (23) .

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Illustration 7	g00717587

11. Remove eight bolts (25) and valve block (24) from pump (2) .

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Illustration 8	g00717589

12. Remove cylinder (26) and the spacer under the cylinder from valve block (24) .

13. Remove cylinder (27) and spring (28) from the valve block.

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Illustration 9	g00717590

14. Remove the four bolts that hold flange (29) to valve block (24). Remove flange (29) and the O-ring seal from the valve block.

15. Remove control piston (30) and bias piston (32) from valve block (24). Remove the O-ring seal from each of the pistons.

16. Remove valve plate (31) from the valve block.

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Illustration 10	g00717591

17. If necessary, use Tooling (A) and remove bearing cup (33) from valve block (24) .

18. If necessary, remove pin (35) from the valve block.

19. Remove plug (37) and three plugs (34) from the valve block. Remove the O-ring seal from each of the plugs.

20. If necessary, remove seat (36), the poppet and the spring from the valve block.

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Illustration 11	g00717593

21. Remove gasket (38) from pump (2) .

22. Remove bearing (39) from the shaft.

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Illustration 12	g00717594

23. Remove spacer (40) and cylinder block (41) from the shaft.

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Illustration 13	g00717595

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Illustration 14	g00717599

24. Remove 6.4 mm (.250 inch) stock from the side of 4B-5274 9/16 inch Washer (43), as shown.

25. Use a press and a 4B-5274 9/16 inch Washer (43) in order to compress the spring. Remove snap ring (42) from the groove in cylinder block (41) .

26. Release the tension on the spring.

27. Remove washer (44), spring (45) and washer (46) from cylinder block (41) .

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Illustration 15	g00717605

28. Remove cover (47) from housing (48) .

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Illustration 16	g00717607

29. Remove key (49) from housing (48) .

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Illustration 17	g00717608

30. Rotate spacer (50). Remove spacer (50), cage (52) and nine pistons (51) .

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Illustration 18	g00717609

31. Remove shaft (53) and swashplate (54) from housing (48) .

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Illustration 19	g00717610

32. Remove dowel (56) from yoke (55) .

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Illustration 20	g00717660

33. Remove cover (57) from housing (48) .

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Illustration 21	g00717662

Note: Shims are located under spacer (58) .

34. Remove O-ring seal (59) and spacer (58) from both sides of the housing. Remove the shims under spacer (58) .

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Illustration 22	g00717664

35. Remove cup (60) and cone (61) from both sides of the housing.

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Illustration 23	g00717665

36. Remove yoke (55) from housing (48) .

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Illustration 24	g00717668

37. Remove two stops (62) from yoke (55) .

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Illustration 25	g00717669

38. Remove bearing cone (63) from housing (48) .

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Illustration 26	g00717670

39. If necessary, remove cup (64) with Tooling (A) .

40. If necessary, remove seal (65) from housing (48). Use Tool (B) in order to remove the snap ring under seal (65) .

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Illustration 27	g00717673

41. If necessary, remove seal (66) from housing (48). Use Tool (B) in order to remove the snap ring under seal (66) .