854G Wheel Dozer Machine Systems Caterpillar

Assembly Procedure

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Illustration 1	g00306871

1. Use Tooling (A) in order to install retaining ring (57).

2. Use Tooling (B) in order to install lip seals (56) in housing (55).
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   Illustration 2	g00306870

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   Illustration 3	g00306869

3. Put swashplate bearings (52) and (54) and install screws (55). Tighten screws (55) to a torque of 4.0 ± 0.4 N·m (36.0 ± 4.0 lb in).

4. Install bearing cup (53).

5. Install bearing cone (51).
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   Illustration 4	g00306963

6. Install swashplate (44) in piston pump (2).

7. Install shaft (43) in piston pump (2).
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   Illustration 5	g00306862

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   Illustration 6	g00306861

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   Improper assembly of parts that are spring loaded can cause bodily injury. To prevent possible injury, follow the established assembly procedure and wear protective equipment.

   Note: There is spring force against lock ring (38). When lock ring (38) is not seated properly, the spring force will be released. Installation of the internal components in barrel assembly (35) should be performed in a press. This is done in order to retain spring (39) and lock ring (38).

8. Install guide (36), spring (39), and guide (37) in barrel (35).

9. Slowly release compression on spring (39). Make sure that retaining ring (38) is seated properly.
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   Illustration 7	g00306868

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   Illustration 8	g00306983

10. Install pistons (45) on plate (50). Install the piston and plate assembly in barrel assembly (35).
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    Illustration 9	g00307003

11. Install rotating group (58) on the shaft. Make sure that the splines are aligned properly.
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    Illustration 10	g00307023

12. Apply Tooling (C) to the threads of bolts (46). Position plates (49) and (48) and install bolts (46). Tighten bolts (46) to a torque of 34 ± 3 N·m (25 ± 2 lb ft).
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    Illustration 11	g00307043

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    Illustration 12	g00307044

13. Install plug (42) and the O-ring seal. Tighten plug (42) to a torque of 102 ± 4 N·m (75 ± 3 lb ft).

14. Position cover (41) and the O-ring seal. Install bolts (40). Tighten bolts (40) to a torque of 8.5 ± 1.0 N·m (75.0 ± 9.0 lb in).
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    Illustration 13	g00306859

15. Install spacer (34) on the shaft.

    Note: If the shaft bearings, the shaft, the head or the housing were replaced, an end play adjustment must be made. Adjust the spacer in order to obtain the proper axial shaft end play. The correct axial shaft end play is 0.25 to 2.54 mm (0.010 to 0.100 inch).

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    Illustration 14	g00306858

16. Install bearing cone (33) on the shaft.

17. Install gasket (32) on piston pump (2).
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    Illustration 15	g00306857

18. Install the O-ring seals on pistons (25) and (30). Apply Tooling (C) to the threads of pistons (25) and (30).

19. Install pistons (25) and (30) to head assembly (23). Tighten pistons (25) and (30) to a torque of 79 ± 4 N·m (58 ± 3 lb ft).

20. Install pin (31).

21. Install bearing cup (29).
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    Illustration 16	g00306856

22. Install plate (28) to head assembly (23). Make sure that the notch in plate (28) is aligned with pin (31).
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    Illustration 17	g00306855

23. Install spring (26) and cylinder (27).

24. Install cylinder (24) to head assembly (23).
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    Illustration 18	g00307045

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    Illustration 19	g00306854

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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.

25. Position head assembly (23) to piston pump (2).

26. Install bolts (22). Tighten bolts (22) evenly. Tighten bolts (22) to a torque of 91 ± 4 N·m (67 ± 3 lb ft).
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    Illustration 20	g00306852

27. Install spool (21), O-ring seal (20), and plug (19) to compensator valve (3). Tighten plug (19) to a torque of 31 ± 2 N·m (23 ± 1 lb ft).
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    Illustration 21	g00306851

28. Install spool (18), O-ring seal (17), and plug (16) to compensator valve (3). Tighten plug (16) to a torque of 31 ± 2 N·m (23 ± 1 lb ft).
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    Illustration 22	g00306849

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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.

29. Install guide (15), spring (14), guide (13), O-ring seal (12), and plug (11) to compensator valve (3). Tighten plug (11) to a torque of 102 ± 5 N·m (75 ± 3 lb ft).
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    Illustration 23	g00307046

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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.

30. Install guide (10), spring (9), pin (8), guide (7), O-ring seal (6), and plug (5) to compensator valve (3). Tighten plug (5) to a torque of 79 ± 4 N·m (58 ± 3 lb ft).
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    Illustration 24	g00306846

31. Position compensator valve (3). Apply Tooling (C) to the threads of capscrews (4) and install capscrews (4). Tighten bolts (4) to a torque of 34 ± 3 N·m (25 ± 2 lb ft).

32. Install O-ring seal (1) on piston pump (2).

End By:

1. Install the piston pump. Refer to Disassembly and Assembly, "Piston Pump (Hydraulic Fan) - Install".