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


Main Control Valve - Assemble
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1.1. Assembly Procedure

Assembly Procedure



    Illustration 1g01213977

  1. Install gaskets (189), O-ring seals (190), cover (191), washers (192), and bolts (193) onto housing (188).


    Illustration 2g01213976

  2. Install O-ring seals (185) and gaskets (184).

  3. Install housing (183) onto housing (188).

  4. Install washers (186) and bolts (187).


    Illustration 3g01213975

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


    Illustration 4g01213974

    ------ 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.


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


    Illustration 5g01213973

    ------ 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.


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

  8. Install O-ring seal (151), O-ring seal (152), housing (153), and cap (154).

  9. Install valve assembly (150) and bolts (149).


    Illustration 6g01213972

    ------ 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.


  10. Install the O-ring seal and plug (148).

  11. Install valve (143), spring (144), O-ring seal (145), backup ring (146), and plug (147). Tighten plug (147) to a torque of 220 ± 20 N·m (162 ± 15 lb ft).

  12. Install spool (138), O-ring seal (139), O-ring seal (140), and housing (141). Tighten housing (141) to a torque of 105 ± 10 N·m (77 ± 7 lb ft). Install cap (142).


    Illustration 7g01213971

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


    Illustration 8g01213970

    ------ 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.


  14. Install O-ring seal (102) and housing (103). Tighten housing (103) to a torque of 95 ± 14 N·m (70 ± 10 lb ft).

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


    Illustration 9g01213969

    ------ 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.


  16. Install O-ring seal (74) and housing (75). Tighten housing (75) to a torque of 95 ± 14 N·m (70 ± 10 lb ft).

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


    Illustration 10g01213967

  18. Install spool (69), retainer (70), spring (71), retainer (72), and bolt (73).


    Illustration 11g01213966

    ------ 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. Install housing (68) and bolts (67).


    Illustration 12g01213964

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

  21. Install spool (66), poppet (65), and spring (64).


    Illustration 13g01213963

    ------ 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. Install the backup ring, O-ring seal (58), O-ring seal (57), and housing (56). Tighten housing (56) to a torque of 95 ± 14 N·m (70 ± 10 lb ft).

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

  24. Install poppet (41) and spring (40).


    Illustration 14g01213961

    ------ 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.


  25. Install the O-ring seals, plug (39), and plug (36).

  26. Install housing (38) and bolts (37).


    Illustration 15g01213960

  27. Install spring (31), poppet (30), and spring (29).

  28. Install sleeve (32).

  29. Install sleeve (35), poppet (34), and spring (33).


    Illustration 16g01213958

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

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


    Illustration 17g01213957

  32. Install poppet (8) and spring (7).

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

  34. Install poppet (15) and spring (14).


    Illustration 18g01213956

    ------ 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.


  35. Install covers (1).

  36. Install plugs (3). Tighten plugs (3) to a torque of 240 ± 20 N·m (177 ± 15 lb ft).

  37. Install valve (2) and valve (6).

  38. Install block (5) and bolts (4).

End By:

  1. Install the main control valve.

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