5110B Excavator Machine Systems Caterpillar

Disassembly Procedure

Start By:

1. Remove the Travel and Implement Control Valve. Refer to Disassembly and Assembly, "Control Valve (Implement and Travel) - Remove".

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Illustration 1	g00787338

1. Remove eight bolts (1) from each adapter and remove two adapters (2).
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   Illustration 2	g00787343

2. Remove two seals (3) from the bottom of the adapter (2). Remove plug (4) and seal (5) from adapter (4). Repeat the procedure for the other adapter (4).
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   Illustration 3	g00787211

3. Remove 16 bolts (6) and remove cover (7) and cover (8) from the implement and travel control valve.
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   Illustration 4	g00787216

4. Remove two small O-ring seals (9) and three large O-ring seals (10) from cover (7). Repeat the procedure for the other cover (8).
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   Illustration 5	g00787224

5. Remove five springs (11) and five valves (12). Remove spring (13) and valve (14).
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   Illustration 6	g00787252

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   Illustration 7	g00787253

6. Remove spring (15) and valve (16). The spring and the valve are located under valve (14).
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   Illustration 8	g00787467

7. Remove manifold (17) from the control valve.
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   Illustration 9	g00787509

8. Remove three large O-ring seals (18), six O-ring seals (19), one small O-ring seal (20), and two O-ring seals (21) from the bottom of manifold (17).
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   Illustration 10	g00787511

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   Illustration 11	g00787513

9. Remove six dust caps (21), six nipples (22), and the O-ring seals from the manifold (17).

10. Remove two small O-ring plugs (23) and the O-ring seals from manifold (17).

11. Remove four large O-ring plugs (24) and the O-ring seals from manifold (17).

12. Remove six plungers (26) and O-ring seals (27) from plugs (25).

13. Remove six balls (28) from manifold (17).
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    Illustration 12	g00787895

14. Remove relief valve (29).
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    Illustration 13	g00787913
    Relief valve (29)

15. In order to disassemble relief valve (29), use the procedure that follows:

    1. Remove O-ring seals (30), (31), and (32) from relief valve (29).

    2. Loosen locknut (33).

16. Remove adjuster (34) as a unit from relief valve (29).

17. Remove O-ring seal (38) from adjuster (34).

18. Remove load sensing valve (35), spring (36), and spacer (37) from relief valve (29).

19. Remove adapter (40) from adjuster (34).

20. Remove O-ring seal (41) from adapter (40).

21. Remove pin (39) from the adjuster.

22. Loosen orifice nut (42) and remove retainer assembly (43) from adapter (40).

23. Remove O-ring seal (44) from retainer assembly (43).
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    Illustration 14	g00787920

24. Remove signal duplication valve (45) from the control valve.
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    Illustration 15	g00787923
    Signal duplication valve (45)

    Note: Only the O-ring seals and backup rings in the signal duplication valve (45) are serviceable. However, the valve can be disassembled for cleaning.

25. Disassemble the signal duplication valve (45). Remove backup rings (54), (55) , and (56). Remove O-ring seal (47), O-ring seal (48), O-ring seal (49), O-ring seal (50), and O-ring seal (52).
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    Illustration 16	g00787929

26. Remove filter (57) from the control valve.
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    Illustration 17	g00787083

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    Illustration 18	g00787115

27. Remove two locknuts (58) from coil assemblies (59). Remove two coil assemblies (59) from cartridges (60).
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    Illustration 19	g00787116

28. Remove two cartridges (60) from the control valve.
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    Illustration 20	g00787145
    Cartridge (60)

29. Remove three O-ring seals (61) and two backup rings (62) from the cartridge (60). Repeat the procedure for the remaining cartridge.
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    Illustration 21	g00787289

30. Remove two pilot relief valves (63).
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    Illustration 22	g00787303
    Relief valve (63)

    Note: Only the O-ring seals and backup rings in the relief valves (63) are serviceable. However, the valve can be disassembled for cleaning.

31. Disassemble the relief valve (63). Remove backup rings (65), (66) , and (67). Remove O-ring seal (64), O-ring seal (67), two O-ring seals (68), O-ring seal (69), and O-ring seal (71).
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    Illustration 23	g00787148

32. Remove six relief valves (72) from the control valve.
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    Illustration 24	g00787162
    Relief valve (72)

    Note: Only the O-ring seals and backup rings in the relief valves (72) are serviceable. However, the valve can be disassembled for cleaning.

33. Disassemble the relief valve (72). Remove back up rings (73) and (77). Remove O-ring seal (74), two O-ring seals (75), O-ring seal (76), and O-ring seal (78). Repeat the procedure for the remaining five relief valves.
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    Illustration 25	g00787353

34. Remove six plugs (79), and six seals (80) from makeup valves (81). Remove six makeup valves (81).
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    Illustration 26	g00787373
    Makeup valve (81)

35. Disassemble makeup valve (81). Remove valve (86) and spring (85) from makeup valve (81). Remove O-ring seal (82) and backup ring (83) from valve (86). Remove O-ring seal (84) from makeup valve (81). Repeat the procedure for the remaining five makeup valves (81).
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    Illustration 27	g00788080

36. Remove ten plugs (87) and O-ring seals from manifold housings. Remove six spacers (89), and four dowels (90) from manifold housings. Remove ten resolvers (88) from manifold housings.
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    Illustration 28	g00788102
    Resolver valve (88)

37. In order to disassemble resolver valves (88), use the procedure that follows:

    Note: Only the O-ring seals and backup rings in the relief valves (93) are serviceable. However, the resolver valve can be disassembled for cleaning and inspection.

    1. Remove backup rings (91) and (92) from resolver valve (88). Remove O-ring seals (98) and (90) from resolver valve (88).

    2. Remove seat (93) from resolver valve (88).

    3. Remove ball (94) from resolver valve (88).
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    Illustration 29	g00788106

38. Remove three resolver valves (95) from the control valve.
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    Illustration 30	g00788121
    Resolver valve (95)

39. In order to disassemble resolver valves (95), use the procedure that follows:

    Note: Only the O-ring seals and backup rings in the relief valves (95) are serviceable. However, the resolver valve can be disassembled for cleaning and inspection.

    1. Remove two backup rings (99) and two backup rings (100) from resolver valve (95). Remove O-ring seals (96), (97), and (98) from resolver valve (95).

    2. Remove seat (101) from resolver valve (95).

    3. Remove ball (102) from resolver valve (95).
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    Illustration 31	g00788136

40. Remove two resolver valve (103) from the control valve.
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    Illustration 32	g00788180
    Resolver valve (103)

41. In order to disassemble resolver valves (103), use the procedure that follows:

    Note: Only the O-ring seals and backup rings in the resolver valves (103) are serviceable. However, the resolver valve can be disassembled for cleaning and inspection.

    1. Remove two backup rings (107) and two backup rings (108) from resolver valve (103). Remove O-ring seals (104), (105), and (106) from resolver valve (103).

    2. Remove seat (109) from resolver valve (103).

    3. Remove ball (110) from resolver valve (103).
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    Illustration 33	g00787385

42. Remove sixteen bolts (111). Remove two manifolds (112) and two spacers (113) from the control valve body. The combined weight of the manifold and a spacer is 34 kg (75 lb).
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    Illustration 34	g00787719

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    Illustration 35	g00787740

43. Separate spacer (113) from manifold housing (112). In order to disassemble manifold housing (112), use the procedure that follows:

    1. Remove three O-ring seals (117) from manifold housing (112).

    2. Remove three retainers (114), three springs (115), and three retainers (114) from manifold housing (113).

    3. Remove three purging screws (120). Remove three nuts (119) and remove plunger assembly (118) and the O-ring seals.

44. Repeat step 43 for the remaining manifold housing (112).
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    Illustration 36	g00787746

45. In order to disassemble spacer (113), use the procedure that follows.

    1. Remove three O-ring seals (121) from spacer (113).

    2. Remove three plugs (124) and three pistons (122) from spacer (113). Remove O-ring seal (123) from each plug (124).

46. Repeat step 45 for the remaining spacer (113).
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    Illustration 37	g00787754

47. Remove sixteen bolts (125). Remove two manifolds (126) from the control valve body. The weight of the manifold is 25 kg (54 lb).
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    Illustration 38	g00787759

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    Illustration 39	g00787763

48. In order to disassemble manifold housing (126), use the procedure that follows:

    1. Remove three O-ring seals (130) from manifold housing (126).

    2. Remove three retainers (127), three springs (128), and three retainers (129) from manifold housing (126).

    3. Remove three purging screws (133). Remove three nuts (132) and remove plunger assembly (131) and the O-ring seals.
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    Illustration 40	g00787776

49. Remove six spools (134) from the control valve.
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    Illustration 41	g00788375

50. Position Tooling (A) on the control valve. See Illustration 41 for the position of the tooling. Secure tooling (A) to a suitable lifting device. Position wood blocks under manifold (136). Illustration 41 shows the position of the wood blocks. Remove five bolts (137) (two bolts on top and three bolts on bottom) that hold valve (138) to manifold (136). Remove control valve (138) from manifold (136). The weight of control valve (138) is 204 kg (450 lb).

51. Repeat step 50 on control valve (135).
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    Illustration 42	g00788405

52. If necessary, remove all remaining plugs and O-ring seals from control valve (138). If necessary, remove all remaining fittings from the control valve.

53. Repeat step 52 for control valve (135).
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    Illustration 43	g00788430

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    Illustration 44	g00788437

54. Remove five small O-ring seals (139), four large O-rings (140) and four large O-rings (141) from manifold (136). If necessary, remove all remaining plugs and fittings from manifold (139).