140 Motor Grader Power Train Caterpillar

Disassembly Procedure

Start By:

1. Remove the piston motor.

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Illustration 1	g06381410

1. Attach the piston motor to Tooling (A) or suitable fixture.

2. Remove bolt (1), sensor (2), and the O-ring seal.
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   Illustration 2	g06381414

3. Remove bolts (3), cover (4), and the O-ring seal.
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   Illustration 3	g06381417

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   Illustration 4	g06381420

4. Remove bolt (5). Use Tooling (B) to remove gear (6).
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   Illustration 5	g06381426

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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.

5. Remove bolts (7) and cover (8).
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   Illustration 6	g06381439

6. Remove plug (9), O-ring seal (10), washers (11), and retainer (12) from cover (8). Remove O-ring seal (13), O-ring seal (14), spring (15), and piston (16) from cover (8).
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   Illustration 7	g06381455

7. Remove bushing (17).
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   Illustration 8	g06381466

8. Remove pilot valve (24) and washers (23) from bushing (17). Remove spring (18), retaining ring (19), ring (20), spring (21), and retainer (22) from bushing (17).
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   Illustration 9	g06381471

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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.

9. Remove bolts (25), (26), and housing (27).
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   Illustration 10	g06381485

   Note: Note the location of pipes (28) and washers (29) for assembly purposes.

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   Illustration 11	g06381488

10. Remove pipes (28), and washers (29).

11. Remove control plate (30).

12. Remove O-ring seals (31) and back up rings (32) from pipes (28).
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    Illustration 12	g06385989

13. Use Tooling (C) to remove bearing cup (33).
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    Illustration 13	g06385994

14. Remove shims (34).
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    Illustration 14	g06385995

15. Remove fittings (35) and the O-ring seals.

16. Measure the length of adjustment screws (36) and (37) for assembly purposes and remove.
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    Illustration 15	g06385997

17. Remove valve assembly (38) from the housing.
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    Illustration 16	g06386006

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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.

18. Remove plug (39) and the O-ring seal from the housing.
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    Illustration 17	g06386033

19. Remove guide (43), spring (42), guide (41), and plunger (40) from the housing.
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    Illustration 18	g06386043

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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. Install Tooling (D) onto the motor housing.
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    Illustration 19	g06386045

21. Use Tooling (E) to remove bearing cone (44) (not shown).
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    Illustration 20	g06386060

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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.

22. Remove ring (45).

23. Remove Tooling (D).
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    Illustration 21	g06386078

24. Remove rotating assembly (46) from the housing.
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    Illustration 22	g06386082

    Note: Note the location of pistons (47) and (48) for assembly purposes.

25. Remove rod (47) from the rotating assembly.

26. Remove piston (48) and (49) from the rotating assembly.
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    Illustration 23	g06386085

27. Remove O-ring seal (50) from piston (49). Repeat for the other piston.
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    Illustration 24	g06386094

28. Remove shaft assembly (51) from the rotating assembly.
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    Illustration 25	g06386100

29. Use Tooling (F) and a suitable press to remove bearing race (52) and bearing cone (53) from shaft assembly (51).
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    Illustration 26	g06386109

30. Remove barrel (54) from the rotating group.
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    Illustration 27	g06386117

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    Illustration 28	g06386161

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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.

31. Use Tooling (G) and a suitable press to remove retaining ring (55) from barrel (54).

32. Remove shims (59), washer (58), spring (57), and washer (56) from barrel (54).
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    Illustration 29	g06386164

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    Illustration 30	g06386172

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    Illustration 31	g06386183

33. Raise the temperature of swashplate (63). Remove bolts (60), plate (61), shims (62), and sleeves (66) from swashplate (63). Repeat for the opposite side.

34. Remove retainer (65) and pistons (64).

35. Remove pistons (64) from retainer (65).
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    Illustration 32	g06386187

36. Remove retaining ring (68) from housing (67).
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    Illustration 33	g06386190

37. Remove cradle bearings (69).

38. Use Tooling (G) to remove lip seal (70).
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    Illustration 34	g06386192

39. Remove pins (71) and bearing cup (72).
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    Illustration 35	g06386195

40. Remove plug (73) and the O-ring seal.
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    Illustration 36	g06386197

41. Remove plug (74) and the O-ring seal. Repeat for the opposite side.
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    Illustration 37	g06386198

42. Remove fitting (75) and the O-ring seal.