MH3037 Material Handler Machine Systems Caterpillar

Assembly Procedure

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Illustration 1	g00988650

1. Use a suitable press to Install bearings (34) to shaft (33). The bearings are serviced only as a kit to maintain proper bearing preload.
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   Illustration 2	g00988447

2. Install retaining ring (32) to shaft (33).
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   Illustration 3	g00988580

3. Install seal (22) into cover (21). Install shims (23), cover (21), and retaining ring (20) onto shaft assembly (33).
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   Illustration 4	g06128513

4. Use a vernier caliper to measure the bearing assembly. The correct dimension is 80.3 + 0.0 − 0.100 mm (3.16 + 0.00 − 0.004 inch). This measurement determines the correct angle of the rotating group.

5. Add shims or subtract shims (23), if necessary.

6. Once the correct dimension is achieved, remove retaining ring (20), cover (21), and shims (23) from shaft (33).
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   Illustration 5	g00988444

7. Install pin (30) and pistons (31) to plate (29). The piston rings are nonserviceable separately to the pistons.
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   Illustration 6	g00988443

8. Install screws (28) to the shaft. Install plate (29) and the pistons to the shaft. Apply Tooling (F) to screws (28). Install screws (28). Tighten the screws to a torque of 15.5 ± 1.5 N·m (137 ± 13 lb in).
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   Illustration 7	g00988666

9. Install spring (26) to barrel (25).
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   Illustration 8	g00988441

10. Install barrel (25) to the pistons.
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    Illustration 9	g00988592

11. Raise the temperature of housing (3) to 80 °C (176 °F). Lower the temperature of rotating group (24).

12. Install rotating group (24) into housing (3). Do not allow the barrel to separate from the pistons during the installation procedure.
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    Illustration 10	g00988387
    Typical example

13. Install O-ring seal (22) and shims (23) to the housing.
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    Illustration 11	g00988386
    Typical example

14. Install cover (21). Install seal (22) to cover (21).
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    Illustration 12	g00988385
    Typical example

15. Use Tooling (A) to Install retaining ring (20).
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    Illustration 13	g00940683

16. Install plate (5) into the housing.
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    Illustration 14	g00991078

17. Place housing (3) into a soft jawed vise. Install Tooling (G) onto housing (3). Use Tooling (D) to measure the depth to the plate. Take this measurement in more than one location. Tighten the bolt on Tooling (G). This will push the plate and the barrel downward. Continue downward until resistance is met. Do not use force. Again measure the depth to the plate. Record the difference between the two measurements. Then subtract 0.20 ± 0.05 mm (0.008 ± 0.0020 inch) from the measurement. This is the correct thickness of shim (23). Remove Tooling (G).
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    Illustration 15	g00940683

18. Remove plate (5) from the housing.
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    Illustration 16	g00988385

19. Use Tooling (A) to remove retaining ring (20).
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    Illustration 17	g00988675

20. Remove cover (21).
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    Illustration 18	g00988387

21. Remove O-ring seal (22) and shims (23) from the housing.
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    Illustration 19	g00988787

22. Use Tooling (B) to remove rotating group (24) from the housing. Do not allow the barrel to separate from the pistons during the removal procedure.
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    Illustration 20	g00988441

23. Remove barrel (25) from the pistons.
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    Illustration 21	g00988666

24. Remove spring (26) from barrel (25).
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    Illustration 22	g00988442

25. Install shim (27) that was determined in Step 17 and spring (26) into barrel (12).
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    Illustration 23	g00988441

26. Install barrel (25) onto the pistons.
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    Illustration 24	g00988592

27. Raise the temperature of housing (3) to 80 °C (176 °F). Lower the temperature of rotating group (24).

28. Install rotating group (24) into housing (3). Do not allow the barrel to separate from the pistons during the installation procedure.
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    Illustration 25	g00988387

29. Install shims (23) and O-ring seal (22) into the housing.
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    Illustration 26	g00988386

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    Illustration 27	g00988385

30. Install cover (21) and use Tooling (A) to install retaining ring (20) into the housing.
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    Illustration 28	g00940591

31. Install O-ring seal (4) and plate (5).
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    Illustration 29	g00988164

32. Install retainer (19) and orifice (18) to poppet (17).

33. Install poppet (17) to flushing valve (7).

34. Install spring (16) to flushing valve (7).

35. Install shims (15) to flushing valve (7).

36. Install O-ring seal (14) to plug (13).

37. Install plug (13) to flushing valve (7).
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    Illustration 30	g00988149

38. Install spool (12) to flushing valve (7).

39. Install discs (11) to flushing valve (7).

40. Install springs (10) to flushing valve (7).

41. Install O-ring seal (9) to lock screws (8).

42. Install lock screws (8) to flushing valve (7).

43. Install flushing valve (7) to port plate (2).
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    Illustration 31	g00988135

44. Install bolts (6) to flushing valve (7). Tighten bolts (6) to a torque of 15.1 ± 1 N·m (134 ± 8 lb in).
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    Illustration 32	g00988393

45. Install O-ring seal (4) and port plate (5) to housing (3).

46. Install port plate (2) to housing (3).
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    Illustration 33	g00988489

47. Install bolts (1) to port plate (2). Tighten bolts (1) to a torque of 75 ± 15 N·m (55 ± 11 lb ft).

End By:

1. Install the piston motor (swing).