906K, 906M, 907K, 907M, 908K and 908M Compact Wheel Loader Machine Systems Caterpillar

Disassembly Procedure

Start By:

1. Drain the piston pump into a suitable container.

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Illustration 1	g06004800

1. Remove retaining ring (1), lip seal carrier (2), and O-ring seal, (3) from the piston pump.

2. Remove lip seal (4) from lip seal carrier (2).

3. Remove shaft (7) from the piston pump.

4. Remove retaining ring (5) and roller bearing (6) from shaft (7).
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   Illustration 2	g06004775

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   Illustration 3	g06004832

5. Remove bolts (8), gasket (16), and pump control body (9).

6. Remove bolts (10), solenoids (11), and O-ring seals (12) from pump control body (9).

7. Remove bolts (13), solenoid (14), and O-ring seal (15) from pump control body (9).
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   Illustration 4	g06005338

8. If necessary, remove orifices (17).

9. Remove feedback pin (18).

10. Dowel pins (19) are a press fit and are to remain in the pump housing.
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    Illustration 5	g06005483

11. Remove charge pressure relief valve (21) and O-ring seal (20).
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    Illustration 6	g06007887

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    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.

12. Remove bolts (22) and head (23).

13. Remove valve plate (26) and pin (25) from head (23).

14. Remove bearing (24) from head (23) if necessary.

15. Remove gasket (27) and pins (28) from pump body (29).
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    Illustration 7	g06007955

16. Remove cylinder block kit (30) from pump body (29).
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    Illustration 8	g06007967

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    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.

17. Remove bolts (31), retainers (32), servo piston caps (33), and O-ring seals (34) from pump body (29).
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    Illustration 9	g06007980

18. Tilt the swashplate up to disengage the servo arm from servo piston (35).

19. Remove servo piston (35) from pump body (29).
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    Illustration 10	g06008092

20. Remove and discard seals (36) and O-ring seals (37).

21. Remove slider block (38) from servo piston (35).
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    Illustration 11	g06008031

22. Lift swashplate (40) out by grasping the swashplate pin. Bearings (39) will remain on swashplate (40).

23. Remove bearings (39) from swashplate (40). Note the bearing orientation for reassembly.