320D2 GC Excavator Machine Systems Load Control Valve (Boom Cylinder) - Disassemble Caterpillar


Load Control Valve (Boom Cylinder) - Disassemble
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1.1. Disassembly Procedure

Disassembly Procedure

Start By:

  1. Remove the boom lowering control valve.


NOTICE

Keep all parts clean from contaminants.

Contamination of the hydraulic system with foreign material will reduce the service life of the hydraulic system components.

To prevent contaminants from entering the hydraulic system, always plug or cap the lines, fittings, or hoses as they are disconnected. Cover any disassembled components and clean them properly before assembly.

Clean the hydraulic system properly after any major component exchange or especially after a component failure, to remove any contamination.




    Illustration 1g01219462

  1. Remove bolts (1).

  2. Remove pilot valve (2) from relief valve (3).

  3. Remove O-ring seals (4).


    Illustration 2g01219487

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

    Personal injury can result from parts and/or covers under spring pressure.

    Spring force will be released when covers are removed.

    Be prepared to hold spring loaded covers as the bolts are loosened.


  4. Remove plugs (5) and O-ring seals (6) from pilot valve (4).

  5. Remove bolts (8).

  6. Remove cover (9).

  7. Remove O-ring seal (7).

  8. Remove guide (10), shims (11), spring (12), and guide (13).

  9. Remove spring (14) and guide (15).


    Illustration 3g01219520

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

    Personal injury can result from parts and/or covers under spring pressure.

    Spring force will be released when covers are removed.

    Be prepared to hold spring loaded covers as the bolts are loosened.


  10. Remove nut (16), plug (17), O-ring seal (18), seat (19), and ball (21) from relief valve (3).

  11. Remove bolts (29) and cover (30).

  12. Remove guide (26), spring (27), and valve (28).

  13. Remove guide (31), ring (32), O-ring seal (33), spring (34), and valve (35).

  14. Remove plugs (20) and O-ring seals (22).

  15. Remove plug (24) and O-ring seal (23).

  16. Remove valve (25).

  17. Remove O-ring seal (36).


    Illustration 4g01219592

  18. Remove O-ring seals (38), (39), (40), (41), and (43) from valve (25). Remove backup ring (37) and (42).

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