320D2 GC Excavator Machine Systems Auxiliary Pilot Valve (Straight Travel) - Assemble Caterpillar


Auxiliary Pilot Valve (Straight Travel) - Assemble
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1.1. Assembly Procedure

Assembly Procedure

Table 1
Required Tools 
Tool  Part Number  Part Description  Qty 
(A)  1U-6396  O-Ring Assembly Compound 

Note: Cleanliness is an important factor. Before assembly, all parts should be thoroughly cleaned in cleaning fluid. Allow the parts to air dry. Wiping cloths or rags should not be used to dry parts. Lint may be deposited on the parts which may cause later trouble. Inspect all parts. If any parts are worn or damaged, use new parts for replacement. All disassembly and all assembly procedures must be performed on a clean work surface and in a clean hydraulic area. Keep cleaned parts covered and protected at all times.

Note: O-rings, gaskets, and seals should always be replaced. A used O-ring may not have the same sealing properties as a new O-ring. Use Tooling (A) during the assembly procedure.



    Illustration 1g00710999

  1. Install new O-ring seal (27) on plug (26).


    Illustration 2g00710996

  2. Install plug (26) in the valve body.


    Illustration 3g00711540

  3. Install spring (25) in the valve body.

  4. Use the following procedure to assemble spool assemblies (19).


      Illustration 4g00710990

    1. Install washer (21), washer (22), and spring (23) on spool (20).

    2. Install seat (24) on spool (20).


    Illustration 5g00710984

  5. Install spool assemblies (19) in the valve body.


    Illustration 6g00710980

  6. Install packing (17) in cap (15).

  7. Install new O-ring seal (18) on cap (15).


    Illustration 7g00710976

  8. Install pushrod (16) in cap (15).


    Illustration 8g00710971

  9. Install caps (15) and the pushrods in the valve body.


    Illustration 9g00710962

  10. Install bushings (14) in the cover.


    Illustration 10g00710937

  11. Install cover (13).

  12. Install bolts (12). Tighten the bolts in an even pattern.


    Illustration 11g00710935

  13. Install new O-ring seal (11) in the valve body.

  14. Install new O-ring seal (10) in the valve body.

  15. Install new O-ring seal (9) in the valve body.


    Illustration 12g00710930

  16. Install new O-ring seal (8) on plug (7).


    Illustration 13g00710920

  17. Install plug (7) in the valve block.


    Illustration 14g00710918

  18. Install valve block (6).

  19. Install bolts (5) in valve block (6).


    Illustration 15g00710917

  20. Install pedal (3).

  21. Install camshaft (4).


    Illustration 16g00710915

  22. Install setscrew (2) in the pedal.


    Illustration 17g00710913

  23. Install bellows (1) on the pilot valve.

End By:

  1. Install the auxiliary pilot control valve.

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