980L Tier 3 Wheel Loader Machine System Caterpillar

Disassembly Procedure

Start By:

1. Remove the piston pump (implement).

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Illustration 1	g06128816

1. Remove bolts (1) and valve group (2), and the O-ring seals from center section (3).
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   Illustration 2	g06128833

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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.

2. Remove bolts (4), nuts (5), and O-ring seals (6).
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   Illustration 3	g03669360

3. Use Tooling (A) and a suitable lifting device to remove rear pump housing (7).
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   Illustration 4	g03669361

4. Remove bearing (8) and bearing cup (9) from rear pump housing (7).

   Note: There are two Brass Pins (which are used to hold the bearings in place) remaining in the front pump housing. If undamaged, leave the brass pins in the front pump housing.

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   Illustration 5	g03669865

5. Remove connection rods (10) from center section (3).
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   Illustration 6	g03670005

6. Remove rotating group (11) from center section (3).
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   Illustration 7	g03683890

7. Use Tooling (B) to remove the bearing cone (13) from the rotating group. Remove ring (12).
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   Illustration 8	g03683856

8. Slide shaft (14) out of barrel (16). Remove barrel (16) from the piston assembly.

9. Use a suitable press and Tooling (C) to remove bearing cone (15) from shaft (14).
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   Illustration 9	g03670277

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   Illustration 10	g03683873

10. Remove lube tubes (17), shims (19), and/or washers.

    Note: Some pumps will NOT have washers

11. Remove port plate (18) from center section (3).
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    Illustration 11	g03683918

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    Illustration 12	g03683925

12. Remove center section (3) from the front pump housing.

13. Remove lube tubes (20), shims (23), and/or washers.

    Note: Some pumps will NOT have Washers

14. Remove port plate (21) and coupling (22).
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    Illustration 13	g03683931

15. Use Tooling (B) to remove the bearing cone (24) from the rotating group. Remove bearing cone (24) and ring (25).
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    Illustration 14	g03687008

16. Remove rotating group (26) from front pump housing (27).
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    Illustration 15	g03687010

17. Remove drive shaft (29) from cylinder barrel (28).

18. Remove cylinder barrel (28) from the piston assembly.
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    Illustration 16	g03715525

19. Use a suitable press to remove bearing cone (30) and guide (31) from drive shaft (29). Remove bearing cone (30) and guide (31).
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    Illustration 17	g03738105

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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.

20. Use a suitable press to compress spring (35).

21. Remove retaining ring (32) from barrel assembly (16).

22. Remove washers (34), spring (35), and bushings (33) from barrel assembly (16).
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    Illustration 18	g03688392

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    Illustration 19	g03688714

23. Apply heat to swashplate (37) to remove bolts (36).

    Note: Bolts (36) have Loctite applied to threads and will require heat to remove.

24. Remove bolts (36) from swashplate (37).
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    Illustration 20	g03688725

25. Remove retainer (38) and shims (39).

    Note: Keep the shims with the plate.

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    Illustration 21	g03688733

26. Remove pistons (40) and plate (41) from swashplate (37).
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    Illustration 22	g03688737

27. Remove pistons (40) from plate (41).
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    Illustration 23	g03688741

    Note: Mark the location of shaft (43) for installation purposes.

28. Remove retainer (45), shims (46), and shaft (43) from swashplate (37). Remove ring (42) from shaft (43), if necessary. Remove actuator assembly (44).
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    Illustration 24	g03717210

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    Illustration 25	g03717243

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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. Use Tooling (D) and a suitable press to remove retainer (48), spring (49), and retainer (50) from actuator (47).
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    Illustration 26	g03717223

30. Remove retaining ring (51) and piston (52) from actuator (47).
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    Illustration 27	g03688748

31. Remove sleeves (53) from the swashplate.

32. Repeat Steps 18 through 31 for the rotating group from the front pump housing.
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    Illustration 28	g03687012

33. Remove bolts (54) and retainer (55) from front pump housing (27).
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    Illustration 29	g03687069

34. Remove O-ring seal (56) from retainer (55).
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    Illustration 30	g03687122

35. Use Tooling (C) and a suitable press to remove lip seal (57) from retainer (55). Remove lip seal (57).
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    Illustration 31	g03687131

36. Remove bearings (58) from front pump housing (27).

    Note: There are two (2) Brass Pins (which are used to hold the bearings in place) remaining in the front pump housing. If undamaged, leave the brass pins in the front pump housing

37. Use Tooling (C) and a suitable press to remove bearing cup (59). Remove bearing cup (59).

38. Repeat Steps 36 and 37 for the rear pump housing.
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    Illustration 32	g03687208

39. Remove bearing cups (60) and shims (61) from center section (3).