320D3 Hydraulic Excavator Machine Systems Caterpillar


Load Control Valve (Stick Cylinder) - Disassemble

Usage:

320D3 ESX

Disassembly Procedure

Table 1
Required Tools 
Tool  Part Number  Part Description  Qty 
6V-7981  Bolt (M10×1.5×70mm) 

Start By:

  1. Remove the load control valve (stick cylinder).

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.


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 1g06310217

  1. Remove fittings (1).


    Illustration 2g06310223

  2. Remove O-ring seals (2) and (3) from both the fittings.


    Illustration 3g06310224


    Illustration 4g06310227

    ------ 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.


  3. Remove two bolts (4), as shown in Illustration 3.

  4. Install Tooling (A) and remove remaining two bolts (4).

  5. Remove Tooling (A) and cover (5) from the valve body.


    Illustration 5g06310231

  6. Remove O-ring seal (6) and backup ring (7) from cover (5).


    Illustration 6g06310233

  7. Remove spring (9) and spool valve (8) from the valve body.


    Illustration 7g06310234


    Illustration 8g06310238

  8. Remove plug (10) and O-ring seal (11) .


    Illustration 9g06310239


    Illustration 10g06310240

    ------ 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.


  9. Remove plug (12) and O-ring seal (13).


    Illustration 11g06310249

  10. Remove spring (16), guide (15), and spool (14) from the valve body.


    Illustration 12g06310252


    Illustration 13g06310254

  11. Remove plug (17) and O-ring seal (18).


    Illustration 14g06310256

  12. Remove relief valve (19).


    Illustration 15g06310263

    ------ 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.


  13. Remove nut (20), screw (21), spring (23), plunger (24), body (25), spring (29), spring (30), plunger (31), valve (32), and valve (35) from body (36).

  14. Remove O-ring seal (22) from screw (21).

  15. Remove O-ring seal (28), backup rings (27), and O-ring seal (26) from body (25).

  16. Remove backup rings (34) and O-ring seal (33) from valve (32).

  17. Remove O-ring seal (37) from body (36).


    Illustration 16g06310550

  18. Remove pipe plug (38) from the valve body.


    Illustration 17g06310552

  19. Remove O-ring seals (39) and (41) from the valve body. Remove plug (40).


    Illustration 18g06310553

  20. Remove O-ring seal (42) from plug (40).

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