335F CR Excavator Machine Systems Caterpillar

Assembly Procedure

Note: Cleanliness is an important factor. Before assembly, clean all parts thoroughly in cleaning fluid. Allow the parts to air dry. Wiping cloths or rags should not be used to dry parts. Lint may be deposited on the parts which may cause later trouble. Inspect all parts. If any parts are worn or damaged, use new parts for replacement. All disassembly and all assembly procedures must be performed on a clean work surface and in a clean hydraulic area. Keep cleaned parts covered and protected at all times.

Note: Apply a light film of hydraulic oil to all components before assembly.

Note: If a failure occurs, an accurate diagnosis of the cause can prevent a recurrence. Information is available to analyze failures for piston pumps and motors. Refer to Special Publication, SEBD0641, "Analyzing Axial Piston Pump and Motor Failures".

Note: Inspect all parts. If any parts are worn or damaged use new parts for replacement. The installation of used parts during reconditioning is acceptable. Reuse and salvage information is available on piston pumps. Refer to Guideline For Reusable Parts and Salvage Operations, SEBF8032, "Piston Pumps and Motors". During reconditioning, correct any conditions that might have caused the original failure.

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Illustration 1	g01279840

1. Install seal (34) into the housing.
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   Illustration 2	g01279836

2. Lower the temperature of bearing (33).

3. Install bearing (33) into the housing.
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   Illustration 3	g00877589

4. Install O-ring seals (32) into housing (27).
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   Illustration 4	g00877587

5. Raise the temperature of bearing race (31). Install bearing race (31) onto the shaft.
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   Illustration 5	g00877586

6. Raise the temperature of bearing race (30). Install bearing race (30) onto shaft (29).
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   Illustration 6	g00877585

7. Install shaft (29) and plate (28) into housing (27).
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   Illustration 7	g00877584

8. Use Tooling (D) in order to install retaining ring (26).
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   Illustration 8	g00877583

9. Reassemble plates (24) and (25).
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   Illustration 9	g00877551

10. Install pistons (23) into plates (24) and (25).
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    Illustration 10	g00877550

11. Install pistons (23) into barrel (22).
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    Illustration 11	g00877549

12. Install barrel (22) and the pistons as an assembly.
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    Illustration 12	g00877548

13. Install steel plates (20). Install plates (21).
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    Illustration 13	g00877547

14. Install piston (19).
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    Illustration 14	g00877545

15. Install springs (18).
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    Illustration 15	g00877544

16. Install valve (16) and spring (17).
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    Illustration 16	g00877542

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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.

17. Install the O-ring seal and plug (15).
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    Illustration 17	g00877795

18. Lower the temperature of bearing (14). Install bearing (14).

19. Install O-ring seal (13) and plate (12).
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    Illustration 18	g01278075

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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.

20. Position head (11) onto the motor housing.

21. Install bolts (10).

22. Tighten bolts (10) to a torque of 431 ± 43 N·m (318 ± 32 lb ft).
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    Illustration 19	g00877538

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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.

23. Install backup up rings (5) and (7). Install O-ring seals (6), (8), and (9).
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    Illustration 20	g00877537

24. Install relief valves (4) into the head.

25. Tighten relief valves (4) to a torque of 177 N·m (130 lb ft).
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    Illustration 21	g00877536

26. Position anti-reaction valve (3) onto the head. Install bolts (2).
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    Illustration 22	g00877535

27. Use a suitable lifting device to remove swing motor (1) from Tooling (A). The weight of swing motor (1) is approximately 77 kg (170 lb).

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1. Install the swing motor.