307B Excavator Machine Systems Caterpillar

Disassembly Procedure

Start By:

1. Remove the swing motor. Refer to Disassembly and Assembly, "Swing Motor - Remove".

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NOTICE
Failure to properly assemble parts or failure to follow established procedures can lead to damage of the parts and assembly. To avoid damage to parts, always identify and mark the parts so that they can be installed in the same location. Ensure that gear surfaces align. Never force parts during assembly.

1. Put identification marks on all parts of the swing motor for installation purposes.
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   Illustration 1	g00528616

2. Remove the oil level gauge and gauge tube (1).

3. Remove mounting bolt (2) from the housing.
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   Illustration 2	g00528625

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   Illustration 3	g00528628

4. Remove check valve (3) from the cover. Remove plug (4), spring (5) and valve (6).

5. Remove O-ring seal (8) and backup ring (7) from the plug.
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   Illustration 4	g00528633

6. Remove oil filler tube (9) from the cover.
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   Illustration 5	g00528635

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   Illustration 6	g00528658

7. Remove check valve (10) from the cover. Remove plug (13), spring (12) and valve (11).

8. Remove O-ring seal (14) and backup ring (15) from the plug.
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   Illustration 7	g00528659

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   Illustration 8	g00528660

9. Remove two relief valve (16). Remove O-ring seal (17) and backup ring (18) from each relief valve.
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   Illustration 9	g00528663

10. Remove four socket head bolts (20) and cover (19) from the motor housing.
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    Illustration 10	g00528665

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    Illustration 11	g00528667

11. Remove anti-reaction valve (21) from the cover. Remove O-ring seal (22) and backup ring (23) from the anti-reaction valve.
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    Illustration 12	g00528701

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    Illustration 13	g00561088

12. Remove anti-reaction valve (24) from the cover. Remove O-ring seal (25) and backup ring (26) from the anti-reaction valve.
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    Illustration 14	g00533631

13. Turn over the cover, as shown. Remove O-ring seal (29) from the cover. Remove retaining ring (30) and inner race (28) from the cover. Remove valve plate (27). Remove the two pistons and two rings from the cover. Remove the four bushings, four rings and four plates from the cover.
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    Illustration 15	g00533632

14. Remove 16 springs (31) from the piston.
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    Illustration 16	g00533634

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    Illustration 17	g00533635

15. Install the two threaded rods of Tooling (A) in threaded puller holes in piston (32). Install the remainder of Tooling (A), as shown. Alternate the tightening of the two nuts of Tooling (A) in order to pull piston (32) from the motor housing.
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    Illustration 18	g00533636

16. Remove O-ring seal (33) from piston (32).
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    Illustration 19	g00533657

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    Illustration 20	g00533659

17. Remove O-ring seal (34) from the motor housing. Remove plate (35) and friction plate (36) from the motor housing.
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    Illustration 21	g00533672

18. Turn over motor housing (38), as shown. Use a soft faced hammer to tap on the end of barrel (37). This should free the barrel from the motor housing. Remove the motor housing from the barrel.
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    Illustration 22	g00533674

19. Remove ring (39) from the barrel.

20. Use Tooling (B) to remove bearing cone (40) from the barrel.

21. Remove plate (41).

22. Put identification marks on the nine pistons for installation purposes.

23. Remove retainer plate (42) and the seven pistons from barrel (43).
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    Illustration 23	g00533684

24. Separate seven pistons (44) from retainer plate (42).
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    Illustration 24	g00533686

25. Remove spring (45) from the barrel.
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    Illustration 25	g00533687

26. Remove bearing (46) from the barrel (43).
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    Illustration 26	g00533689

27. Remove bearing cup (47) from motor housing (38).

28. Remove seal (48) from motor housing (38).