320D2 GC Excavator Machine Systems Swing Motor - Disassemble Caterpillar


Swing Motor - Disassemble
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1.1. Disassembly Procedure

Disassembly Procedure

Table 1
Required Tools 
Tool  Part Number  Part Description  Qty 
8T-0651  Bolts 
8T-4167 Hard Washers 
1P-1859  Retaining Ring Pliers 
9S-9152  Bearing Puller 
1P-0074  Slide Hammer Puller 
5F-7344 Puller Block 
5P-4750 Adjusting Screw 
7S-7786 Puller Leg 

Start By:

  1. Remove the swing motor.

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.



    Illustration 1g00704611

  1. Remove bolts (2). Remove anti-reaction valve (3) from head (1). Remove mounting bolts (4).


    Illustration 2g00704621

  2. Remove dipstick tube (5) and breather tube (6) from motor housing (7).


    Illustration 3g00704704

  3. Remove relief valves (8) from the head.


    Illustration 4g00704710

  4. Remove O-ring seals (10), (12), and (13). Remove backup rings (9) and (11).


    Illustration 5g00704719

    ------ 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.


  5. Remove bolts (14) from the head. Remove the head from the motor housing.


    Illustration 6g00704734

    ------ 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. Remove plug (18), O-ring seal (17), spring (16), and spool valve (15) from the head. Repeat for the other side.


    Illustration 7g00704741

  7. Remove tee fitting (19), fitting (20), and plugs (21) from the head.


    Illustration 8g00704743

  8. Remove O-ring seal (22) from the plug (21).


    Illustration 9g00704749

  9. Remove O-ring seal (23) and O-ring seal (24) from the fittings (19) and (20).


    Illustration 10g00704754

  10. Remove O-ring seal (25).


    Illustration 11g00704771

  11. Remove spring pins (26) and bearing (27) from the head.


    Illustration 12g00704796

  12. Remove springs (28) from the motor housing. Remove port plate (29) from the motor housing.


    Illustration 13g01021864
    Typical Example

  13. Install Tooling (A) and apply air pressure in order to unseat the piston.

    Note: Use air pressure in order to avoid damage to the piston.



    Illustration 14g01021875

  14. Remove piston (30) from the motor housing.


    Illustration 15g01022038
    Typical Example

  15. Remove plates (31).


    Illustration 16g01021889
    Typical Example

  16. Remove barrel (32) and the pistons as an assembly.


    Illustration 17g01021898

  17. Mark pistons (33).

  18. Remove pistons (33) from barrel (32).


    Illustration 18g01021903

  19. Remove pistons (33) from plates (34) and (35).


    Illustration 19g01021909

  20. Separate plates (34) and (35).


    Illustration 20g01021919
    Typical Example

  21. Remove O-ring seals (36) and (36a) from the motor housing.


    Illustration 21g00705209

  22. Remove swashplate (37) from the motor housing.


    Illustration 22g00705222

  23. Use Tooling (B) to remove retaining ring (38) from shaft (39).


    Illustration 23g00705258

  24. Remove shaft (39) from the motor housing.


    Illustration 24g00705277

  25. Use a suitable press and Tooling (C) to remove bearing race (40).


    Illustration 25g00705284

  26. Use a suitable press and Tooling (C) to remove bearing race (41).


    Illustration 26g01022013
    Typical Example


    Illustration 27g00705295

  27. Use Tooling (D) to remove bearing (42) from the motor housing.


    Illustration 28g00705441

  28. Remove lip seal (43) from the motor housing.


    Illustration 29g00705442

  29. Remove fitting (44) from the motor housing.


    Illustration 30g00705445

  30. Remove O-ring seal (45) from the fitting (44).

Information System:

320D2 GC Excavator Machine Systems Swing Motor - Remove and Install
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