545 Wheel Skidder Machine Systems Caterpillar

Disassembly Procedure

Start By:

1. Remove the piston pump. Refer to Disassembly and Assembly, "Piston Pump (Implement, Pilot, Steering, Brake) - 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	g00602533

1. Remove two bolts (2) and gear pump (3) from piston pump (1).

   Note: For machines without a winch, a cover must be removed instead.

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   Illustration 2	g00602611

2. Remove O-ring seal (4). If the machine is equipped with a winch, also remove coupling (5).
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   Illustration 3	g00602631

3. Remove pressure tap (6).

4. Remove four bolts (8) and compensator valve (7).
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   Illustration 4	g00602632

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   Illustration 5	g00602634

5. Remove plug (9) and valve (10) from compensator valve (7).

6. Remove O-ring seals (11) and (12).
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   Illustration 6	g00602635

7. Turn over the compensator valve. Remove three seals (13).
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   Illustration 7	g00602638

8. Remove plug (15), spring guide (17), spring (18), spring guide (19), and spool (20) from the compensator valve.

9. Remove locknut (14), the setscrew, and O-ring seal (16) from plug (15).
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   Illustration 8	g00602641

10. Remove plug (22), spring guide (24), tube (25), spring (26), spring guide (27), and spool (28) from the compensator valve.

11. Remove locknut (21), the setscrew, and O-ring seal (23) from plug (22).
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    Illustration 9	g00602644

12. Remove two plugs (30) from the compensator valve. Remove O-ring seals (29) from the plugs.
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    Illustration 10	g00602646

13. Place the piston pump on wood blocks, as shown.

14. Remove four bolts (32) and two bolts (31). Remove pump head (33).
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    Illustration 11	g00602648

15. Remove plate (34) from pump head (33).
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    Illustration 12	g00602650

16. Remove rods (35) and bearing race (36) from pump head (33).
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    Illustration 13	g00602651

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    Illustration 14	g00602653

17. Remove the gasket from pump housing (37).

18. Remove the springs from pistons (39). Remove pistons (39) from pump housing (37).

19. Use Tooling (A) to remove bearing (38).
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    Illustration 15	g00602654

20. Remove barrel (40) from the pump housing.
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    Illustration 16	g00602655

21. Place barrel (40) in a suitable press, as shown. Remove snap ring (41).
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    Illustration 17	g00602656

22. Remove retainer (44), spring (43), and retainer (42) from barrel (40).
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    Illustration 18	g00602659

23. Remove four screws (45). Remove the limiter plate, the spacer plate, the retainer plate, and pistons (46) as a unit.
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    Illustration 19	g00602660

24. Remove shaft (47) and plug (48) from the pump housing.
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    Illustration 20	g00602662

25. Remove three bolts (49) and cover (50).
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    Illustration 21	g00602663

26. Remove O-ring seal (51) from cover (50). Remove O-ring seal (52) from plug (48).
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    Illustration 22	g00602664

27. Remove swashplate (53) from the pump housing.
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    Illustration 23	g00602666

28. Remove two screws (54) and the races from the pump housing.

29. Remove bearing (55).
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    Illustration 24	g00602668

30. Remove bearing race (56).
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    Illustration 25	g00602670

31. Turn over the pump housing. Remove snap ring (60) and seal (59).

32. Remove O-ring seals (57) and (58).