854K Wheel Dozer and 992K Wheel Loader Machine Systems Caterpillar

Disassembly Procedure

Start By:

1. Remove the ripper control valve.

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Illustration 1	g03390660

Note: Mark the orientation of adapter assemblies (1) for assembly purposes.

1. Remove adapter assembly (1). Remove O-ring seals (2). Repeat this step for the remaining adapter assembly.
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   Illustration 2	g03390676

2. Remove nut (3), washer (4), and coil assembly (5).
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   Illustration 3	g03392884

3. Remove cartridge assembly (6). Remove O-ring seals (7) from cartridge assembly (6).
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   Illustration 4	g03392890

4. Remove plug (8). Remove O-ring seal (9) from plug (8).
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   Illustration 5	g03392895

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   Personal injury can result from being struck by parts propelled by a released spring force. Make sure to wear all necessary protective equipment. Follow the recommended procedure and use all recommended tooling to release the spring force.

5. Remove housing assembly (10). Remove O-ring seals (11) and O-ring seal (12).
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   Illustration 6	g03392904

6. Remove retainer (13), spring (14), and retainer (15).

7. Repeat Steps 2 through 6 for the other side of the valve.
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   Illustration 7	g03392911

8. Remove lift stem (16).
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   Illustration 8	g03392914

9. Remove plug (18) from lift stem (16). Remove O-ring seal (17) from plug (18).
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   Illustration 9	g03393104

10. Remove relief valve (19).
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    Illustration 10	g03393107

11. Remove O-ring seals (20) from relief valve (19).
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    Illustration 11	g03393122

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    Personal injury can result from being struck by parts propelled by a released spring force. Make sure to wear all necessary protective equipment. Follow the recommended procedure and use all recommended tooling to release the spring force.

12. Remove nut (28), washer (27), retainer (26), O-ring seal (25), hard washer (24), spring (23), plate (22), and valve (21) from relief valve (19).
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    Illustration 12	g03393136

13. Remove check valve (29).
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    Illustration 13	g03393142

14. Remove O-ring seal (32), backup ring (31), and O-ring seal (30) from check valve (29).
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    Illustration 14	g03393146

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    Personal injury can result from being struck by parts propelled by a released spring force. Make sure to wear all necessary protective equipment. Follow the recommended procedure and use all recommended tooling to release the spring force.

15. Remove nut (33), washer (34), retainer (35), washer (36), washer (37), O-ring seal (38), spring (39), and valve (40) from check valve (29).
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    Illustration 15	g03393180

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    Personal injury can result from being struck by parts propelled by a released spring force. Make sure to wear all necessary protective equipment. Follow the recommended procedure and use all recommended tooling to release the spring force.

16. Remove valve (44) from body assembly (41). Remove stem (43) and spring (42).
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    Illustration 16	g03395501

17. Remove retaining ring (45) from valve (44). Remove plug (47). Remove O-ring seal (46) from plug (47).
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    Illustration 17	g03395506

18. Remove sleeve bearing (50), O-ring seal (49), and seat (48) from body assembly (41).

19. Repeat Steps 13 through 18 for the remaining check valve.
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    Illustration 18	g03394215

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    Personal injury can result from being struck by parts propelled by a released spring force. Make sure to wear all necessary protective equipment. Follow the recommended procedure and use all recommended tooling to release the spring force.

20. Remove plug (54). Remove O-ring seal (53) from plug (54). Remove spring (52) and valve (51).
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    Illustration 19	g03394380

21. Remove bolts (55), relief valve (56), O-ring seal (57), and shims (58).
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    Illustration 20	g03394402

22. Remove O-ring seal (60) and backup ring (59) from relief valve (56).
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    Illustration 21	g03394407

23. Remove seat (62) from relief valve (56). Remove O-ring seal (61) from seat (62).
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    Illustration 22	g03394410

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    Personal injury can result from being struck by parts propelled by a released spring force. Make sure to wear all necessary protective equipment. Follow the recommended procedure and use all recommended tooling to release the spring force.

24. Remove nut (63), washer (64), O-ring seal (65), retainer (66), hard washer (67), spring (68), and valve (69) from relief valve (56).
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    Illustration 23	g03394419

25. Remove spring (70) and valve (71).
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    Illustration 24	g03394606

26. Remove plug (72). Remove O-ring seal (73) from plug (72).

27. Remove plug (74). Remove O-ring seal (75) from plug (74).

28. Remove plug (76). Remove O-ring seal (77) from plug (76).

29. Remove plug (78). Remove O-ring seal (79) from plug (78).
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    Illustration 25	g03394900

30. Remove plug (80). Remove O-ring seal (81) from plug (80).

31. Remove plug (83). Remove O-ring seal (84) from plug (83).

32. Remove orifice plug (82).
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    Illustration 26	g03394904

33. Remove plug (85). Remove O-ring seal (86) from plug (85).

34. Remove plug (87). Remove O-ring seal (88) from plug (87).
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    Illustration 27	g03394931

35. Remove bolts (89), the washers, and the nuts. Remove cover (92). Separate control valve (91) from manifold (90).
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    Illustration 28	g03395041

36. Remove O-ring seals (93), O-ring seals (94), and rectangular seal (95) from cover (92).
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    Illustration 29	g03394940

37. Remove O-ring seals (96), O-ring seals (97), and O-ring seal (98) from control valve (91).