320D2 GC Excavator Machine Systems Main Control Valve - Disassemble Caterpillar


Main Control Valve - Disassemble
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1.1. Disassembly Procedure

Disassembly Procedure

Start By:

  1. Remove the main control valve.


    Illustration 1g01213956

    ------ WARNING! ------

    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.


  1. Remove covers (1).

  2. Remove plugs (3).

  3. Remove valve (2) and valve (6).

  4. Remove bolts (4) and block (5).


    Illustration 2g01213957

  5. Remove spring (7) and poppet (8).

  6. Remove shim (9), shim (10), spring (11), valve (12), and O-ring seal (13).

  7. Remove spring (14) and poppet (15).


    Illustration 3g01213958

  8. Remove piston (16), spring (17), valve (18), cartridge (19), housing (20), spring (21), spring (22), O-ring seals (23), and O-ring seals (24).

  9. Remove shims (25), spring (26), valve (27) and O-ring seal (28).


    Illustration 4g01213960

  10. Remove spring (29), poppet (30), and spring (31).

  11. Remove sleeve (32).

  12. Remove spring (33), poppet (34), and sleeve (35).


    Illustration 5g01213961

    ------ WARNING! ------

    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.


  13. Remove plug (36), plug (39), and the O-ring seals.

  14. Remove bolts (37) and housing (38).


    Illustration 6g01213963

    ------ WARNING! ------

    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 (42), washer (43), retainer (44), adjustment screw (45), O-ring seal (46), O-ring seal (47), spring (48), spool (49), spring (50), shims (51), the O-ring seal, spring (52), spool (53), guide (54), body (55), housing (56), O-ring seal (57), O-ring seal (58), and the backup ring.

  16. Remove spring (40) and poppet (41).


    Illustration 7g01213964

  17. Remove spring (59), spring (60), spool (61), O-ring seal (62), and O-ring seal (63).

  18. Remove spring (64), poppet (65), and spool (66).


    Illustration 8g01213966

    ------ WARNING! ------

    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.


  19. Remove bolts (67) and housing (68).


    Illustration 9g01213967

  20. Remove bolt (73), retainer (72), spring (71), retainer (70), and spool (69).


    Illustration 10g01213969

    ------ WARNING! ------

    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.


  21. Remove nut (92), washer (91), adjusting screw (90), retainer (89), O-ring seal (88), O-ring seal (87), spring (86), spring (85), spool (84), rings (83), O-ring seal (82), guide (81), body (80), spring (79), spool (78), ring (77), rings (76), housing (75), and O-ring seal (74).


    Illustration 11g01213970

    ------ WARNING! ------

    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.


  22. Remove nut (101), washer (100), adjusting screw (99), retainer (98), O-ring seal (97), O-ring seal (96), spring (95), spring (94), spool (93), rings (111), ring (110), guide (109), body (108), spring (107), spool (106), ring (105), rings (104), housing (103), and O-ring seal (102).


    Illustration 12g01213971

    ------ WARNING! ------

    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.


  23. Remove plug (137), housing (136), nut (135), housing (134), O-ring seal (133), nut (132), housing (131), spool (130), O-ring seal (129), spring (128), O-ring seal (127), housing (126), O-ring seal (124), backup ring (125), poppet (123), piston (122), O-ring seal (121), backup ring (120), housing (119), O-ring seal (118), spring (117), poppet (116), washer (115), washer (114), O-ring seal (113), and O-ring seal (112).


    Illustration 13g01213972

    ------ WARNING! ------

    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 plug (148) and the O-ring seal.

  25. Remove plug (147),backup ring (146), O-ring seal (145), spring (144), and valve (143).

  26. Remove cap (142), housing (141), O-ring seal (140), O-ring seal (139), and spool (138).


    Illustration 14g01213973

    ------ WARNING! ------

    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.


  27. Remove plug (160), O-ring seal (158), backup ring (159), spring (157), spring (156), and poppet (155).

  28. Remove cap (154), housing (153), O-ring seal (152), and O-ring seal (151).

  29. Remove bolts (149) and valve assembly (150).


    Illustration 15g01213974

    ------ WARNING! ------

    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.


  30. Remove nut (161), adjustment screw (162), bolts (165), housing (163), spool (164), O-ring seal (166), ring (167), valve assembly (169), O-ring seal (170), O-ring seal (171), and O-ring seal (172) from valve assembly (150).

  31. Remove plug (173) and (168).


    Illustration 16g01213975

  32. Remove O-ring seal (179), spool assembly (178), bolt (180), spring (176), O-ring seal (181), spacer (177), pin (182), spring (175), and shim (174).


    Illustration 17g01213976

  33. Remove bolts (187) and washers (186).

  34. Remove housing (183) from housing (188).

  35. Remove gaskets (184) and O-ring seals (185).


    Illustration 18g01213977

  36. Remove bolts (193), washers (192), cover (191), O-ring seals (190), and gaskets (189) from housing (188).

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