320D2 GC Excavator Machine Systems Pilot Valve (Travel) - Disassemble Caterpillar


Pilot Valve (Travel) - Disassemble
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1.1. Disassembly Procedure

Disassembly Procedure

Start By:

  1. Remove the pilot valve.

Note: Cleanliness is an important factor. Before the disassembly procedure, the exterior of the component should be thoroughly cleaned. This will prevent dirt from entering the internal mechanism.

Note: During the disassembly of the pilot valve, put identification marks on each component for assembly purposes.



Illustration 1g01218262


    Illustration 2g00711974

  1. Remove setscrew (6) and camshaft (19) from the pedal.


    Illustration 3g00711976

  2. Remove pedal (12) from the pilot valve.


    Illustration 4g01021620

  3. Remove nuts (17) and setscrews (5).

  4. Repeat Steps 1 through 3 for the remaining pedal.


    Illustration 5g01021621

  5. Remove bolts (4) and covers (24).


    Illustration 6g01021622

  6. Remove bushings (20) from covers (24).


    Illustration 7g01021623

  7. Remove bolts (26) and cover (25).


    Illustration 8g00712108

    ------ 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.


  8. Remove plug (8) and the pushrod from the body assembly.


    Illustration 9g00712111

  9. Remove piston (18) from pushrod (16).

  10. Remove pushrod (16) from plug (8).


    Illustration 10g00712118

  11. Remove O-ring seal (11) and cap (2) from plug (8).


    Illustration 11g00712119

  12. Remove packing (3) from plug (8).


    Illustration 12g00712122

  13. Remove outer spring (23) and inner spring (22).


    Illustration 13g00712126

  14. Remove spring seat (27).


    Illustration 14g01218265

  15. Remove balls (31).


    Illustration 15g01218266

    ------ 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. Apply pressure to bushing (32).

  17. Remove retaining ring (30).

  18. Slowly release the pressure on bushing (32).


    Illustration 16g01218269

  19. Remove bushing (32).


    Illustration 17g00712139

  20. Remove spool assembly (15).

  21. Use the following procedure to disassemble spool assembly (15).


      Illustration 18g00712141

      ------ 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. Apply pressure to seat (1) by hand. Put the end of spool (14) in the slotted opening of seat (1). Remove seat (1).

    2. Remove spring (7) from spool (14).

    3. Remove washers (9), (10), and (13) from spool (14).


    Illustration 19g00712165

  22. Remove spring (21).

  23. Repeat Steps 8 through 22 in order to remove the other three spool assemblies.


    Illustration 20g01218278

  24. Remove seat (29), ball (28), and plugs (34) from body assembly (33).

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