326F, 329F and 330F Excavators Machine Systems Caterpillar

Assembly Procedure

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Illustration 1	g01200516

1. Install gasket (107) onto pump housing (72).
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   Illustration 2	g01200514

2. Install cover (106) and bolts (105) onto pump housing (72).
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   Illustration 3	g01200512

3. Install guide pins (104) onto pump housing (72).
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   Illustration 4	g01200511

4. Install bearings (103) onto pump housing (72).
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   Illustration 5	g01200510

5. Install bearing (102) into swashplate (97).
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   Illustration 6	g01200509

6. Install dowel pins (101) into swashplate assembly (97).
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   Illustration 7	g01200507

7. Install bearings (100) onto swashplate assembly (97).
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   Illustration 8	g01200506

8. Install plate (99) onto swashplate assembly (97).

9. Repeat Step 5 through Step 8 for swashplate assembly (98).
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   Illustration 9	g01200504

10. Install swashplate assemblies (97) and (98) into pump housing (72).

    Note: The swashplate assemblies must be installed in the original position during assembly.

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    Illustration 10	g01200502

11. Install spacer (96) and retaining ring (90) onto shaft assembly (91).
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    Illustration 11	g01201656

12. Raise the temperature of bearing (95) and bearing (93). Install bearing (95) and bearing (93) onto shaft assembly (91).
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    Illustration 12	g01200498

13. Install ring (94) onto shaft assembly (91).

14. Repeat Step 11 through Step 13 for shaft assembly (92).
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    Illustration 13	g01201657

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    Illustration 14	g01201658

15. Lower the temperature of the shaft assemblies. Install shaft assemblies (91) and (92) into pump housing (72).
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    Illustration 15	g03425311

    Note: The pump has been removed from Tooling (B) for photographic purposes only.

16. Use Tooling (E) to install retaining rings (90).
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    Illustration 16	g01200491

17. Install springs (89) into barrel (84).
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    Illustration 17	g01200488

18. Install retainer (88) onto barrel (84).
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    Illustration 18	g01200487

19. Install cap (87) onto barrel (84).
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    Illustration 19	g01200486

20. Install pistons (85) into piston plate (86).
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    Illustration 20	g01200485

21. Install piston assembly (83) into barrel (84).

22. Repeat Step 17 through Step 21 for the remaining barrel assembly.
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    Illustration 21	g01200482

23. Install barrel assemblies (81) and (82) into pump housing (72).

    Note: It may be necessary to use string to aid in the installation procedure. The barrel assemblies must be installed in the original position during assembly.

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    Illustration 22	g01200481

24. Install O-ring seal (80) onto covers (78).
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    Illustration 23	g01200477

25. Install covers (78), bolts (77), and plugs (79) onto pump housing (72).
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    Illustration 24	g01200478

26. Install O-ring seals (76) into pump housing (72).
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    Illustration 25	g01200475

27. Install plug (76) into covers (75).
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    Illustration 26	g01200473

28. Install covers (75), bolts (74), and plugs (73) onto pump housing (72).
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    Illustration 27	g01200472

29. Install O-ring seals (68) and (69) onto pump housing (72). Install port plates (70) and (71).

    Note: The port plates must be installed in the original position during assembly.

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    Illustration 28	g01200471

30. Install orifices (67) into head (58).
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    Illustration 29	g01200462

31. Install plugs (65) and (66) into head (58).
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    Illustration 30	g01201668

32. Install bearings (64) into the head.
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    Illustration 31	g01200459

33. Install O-ring seal (63) into covers (61).
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    Illustration 32	g01200458

34. Install nipples (62), covers (61) and bolts (60) onto head (58). Install caps (59) onto nipples (62).
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    Illustration 33	g01200457

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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.

35. Attach Tooling (C) and a suitable lifting device to head (10). Install head (58), bolts (56), and bolts (57). The weight of head (58) is approximately 41 kg (90 lb).
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    Illustration 34	g01200392

36. Install O-ring seal (54) and lip seal (55) onto the seal assembly.
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    Illustration 35	g01201683

37. Install shrink wrap on the shaft. The string will help to protect the seal during the installation procedure. Install the gasket and bell housing (53). Install bolts (51).
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    Illustration 36	g01201684

38. Use Tooling (D) and Tooling (J) to install seal assembly (52).
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    Illustration 37	g00706275

39. Install plugs (49). Install three plugs (50) into the pump control.
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    Illustration 38	g00882609

40. Install slide plate (47) and dowel (48) onto the control linkage.
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    Illustration 39	g00706273

41. Install control linkage (46) and sleeve (45) into the pump control.
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    Illustration 40	g00706272

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    Illustration 41	g02406463

42. Install O-ring seal (44) onto pin (43).
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    Illustration 42	g02406460

43. Install pin (43) into the pump control.
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    Illustration 43	g00882608

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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.

44. Install shims (38), spool (39), spring (40), spring (41), and control piston (42) into the pump control.
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    Illustration 44	g00706267

45. Install O-ring seal (37) onto the cover.
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    Illustration 45	g00706266

46. Install cover (36) onto the pump control. Install bolts (35).
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    Illustration 46	g00706265

47. Install pilot piston (34) into the pump control.
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    Illustration 47	g00882601

48. Install ball (33) into the guide. Install guide (32) into the pump control. Install spring (31) and spring (30) into the pump control.
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    Illustration 48	g00882599

49. Install O-ring seal (26) onto the adjuster. Install adjuster (24). Install setscrew (22). Install nut (23) and nut (25). Install O-ring seal (27) onto the retainer. Install retainer (29). Install O-ring seal (28).
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    Illustration 49	g00706249

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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.

50. Install cover assembly (21) into the pump control. Install bolts (20).
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    Illustration 50	g00706243

51. Install dowel pin (19) into the pin.
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    Illustration 51	g00706239

52. Place the pump control in a soft jawed vise. Support pin assembly (17). Install pin assembly (17) into the pump control. Install piston (18) into the pump control.
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    Illustration 52	g02406319

53. Install O-ring seal (15) and backup ring (16) onto the stopper.
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    Illustration 53	g02406317

54. Install stopper (14) into the pump control.
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    Illustration 54	g02406297

55. Install screw (13). Install bolts (11). Install cover (12) into the pump control.
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    Illustration 55	g00706166

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    Illustration 56	g02406264

56. Install nut (10) onto the pump control. Install O-ring seals (8) and O-ring seal (9).

57. Repeat Step 53 through Step 56 for the other side of the pump control.
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    Illustration 57	g02406097
    Right Pump Only

58. Install O-ring seal (4), O-ring seal (5), O-ring seal (6), and O-ring seal (7) onto the proportional reducing valve.
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    Illustration 58	g02406017
    Right Pump Only

59. Install proportional reducing valve (3) onto pump control (1).
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    Illustration 59	g02405999

60. Install pump control (1) and bolts (2).

End By:

1. Install the pump drive coupling.