980M Tier 4 and 982M Tier 4 Wheel Loaders Machine Systems Caterpillar

Assembly Procedure

Note: The axial end play must be adjusted if the swashplate, the swashplate bearings, the shaft, the shaft bearings, the head, or the housing has been replaced. The axial end play required is between 0.01 mm (0.00039 inch) and −0.10 mm (−0.00394 inch).

Show/hide table

Illustration 1	g02598359

Show/hide table

Illustration 2	g02594036

Show/hide table

Illustration 3	g02597532

1. Use Tooling (B) in order to install lip seal (64) in housing (26). The sealing lip must face inward. Lubricate the sealing lip lightly with hydraulic oil before installation. Install retaining rings (63) into housing (26).

2. Install lip seal (62) in housing (26). The sealing lip must face outward. Lubricate the sealing lip lightly with hydraulic oil before installation.
   Show/hide table

   Illustration 4	g02599477

   Show/hide table

   Illustration 5	g02599541

3. Lower the temperature of bearing cup (68). Use Tooling (B) in order to install bearing cup (68) in housing (26). Install bearing cup (68) until the bearing cup is seated.

4. Install bearing (65) and bearing (66) into housing (26). Install set screws (67).

5. Install bearing cone (61) into housing (26).
   Show/hide table

   Illustration 6	g02600376

6. Place housing (26) onto support blocks in order to allow space for installation of shaft (36). Install shaft (36) into housing (26).

7. Install swashplate (46) into housing (26).

8. Install plug (50) and the O-ring seal into housing (26). Tighten plug (50) to a torque of 102 ± 4 N·m (75 ± 3 lb ft).
   Show/hide table

   Illustration 7	g02597936

   Show/hide table

   Illustration 8	g02600856

   Show/hide table

   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.

9. Install spacer (58), spring (59), and spacer (60) into barrel (55).

10. Use Tooling (B) and use a suitable press in order to compress spring (59).

11. Install retaining ring (57) into barrel (55).
    Show/hide table

    Illustration 9	g02597758

12. Install pistons (54) into the original locations in spacer (56) and barrel (55). For best results, place the barrel in an upright position. Insert the pistons into spacer (56). Lift the pistons by using spacer (56) and insert pistons (54) into barrel (55).
    Show/hide table

    Illustration 10	g02600416

13. Position housing (26) horizontally. Install rotating group (51) and install shim kit (52) onto shaft (53).
    Show/hide table

    Illustration 11	g02600538

14. Install bearing cone (42) onto shaft (53).
    Show/hide table

    Illustration 12	g02597521

15. Position two spacers (47) and two locking plates (48) to the original positions on swashplate (46).

16. Apply Tooling (F) onto bolts (49). Install four bolts (49) in order to hold plates (48) and spacers (45) to swashplate (46). Tighten bolts (49) to a torque of 34 ± 3 N·m (25 ± 2 lb ft).
    Show/hide table

    Illustration 13	g02592978

17. Lower the temperature of bearing cup (40). Use Tooling (B) in order to install bearing cup (40) in head (31). Install bearing cup (40) until the bearing cup is seated.

18. Apply Tooling (F) to piston rod (34) and to piston rod (37).

19. Install piston rod (34) and piston rod (37) in head (31). Tighten piston rod (34) and tighten piston rod (37) to a torque of 79 ± 4 N·m (58 ± 3 lb ft).

20. Install pin (39) in head (31).
    Show/hide table

    Illustration 14	g02592977

21. Install spring (35), piston (36) onto piston rod (34), and piston (38) onto head (31).

22. Install piston (38) onto piston rod (37)
    Show/hide table

    Illustration 15	g02600857
    Typical Example

23. Apply Tooling (G) onto plate (43) in order to hold plate (43) to head (31) during assembly.

24. Position head (31) and the gasket (45) onto housing (26).
    Show/hide table

    Illustration 16	g02600858

    Show/hide table

    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.

25. Install bolts (33) into head (31). Tighten bolts (33) to a torque of 91 ± 4 N·m (67 ± 3 lb ft).

26. Install plug (30) and the O-ring seal into head (31). Tighten plug (30) to a torque of 13.0 ± 0.1 N·m (114 ± 1 lb in).

27. Install O-ring seal (29), cover (28), and bolts (27) onto housing (26). Tighten bolts (27) to a torque of 8.5 ± 1.0 N·m (75 ± 9 lb in).
    Show/hide table

    Illustration 17	g00990339

28. Install spool (25), guide (24), spring (23), and guide (22) into valve (2).

29. Install spool (21), guide (20), pin (19), spring (28), and guide (27) into valve (2).
    Show/hide table

    Illustration 18	g00990325

    Show/hide table

    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.

30. Install O-ring seal (16) onto plug (15).

31. Install plug (15) into valve (2).

32. Install O-ring seal (14) onto plug (13).

33. Install plug (13) into valve (2).
    Show/hide table

    Illustration 19	g00990306

34. Install O-ring seal (12) onto plug (11).

35. Install plug (11) into valve (2).

36. Install O-ring seal (10) onto plug (9).

37. Install plug (9) into valve (2).

38. Install O-ring seal (8) onto plug (7).

39. Install plug (7) into valve (2).
    Show/hide table

    Illustration 20	g00990315

40. Install needle valve (6), ring (5), and O-ring seal (4) into valve (2).

41. Install plug (3) into valve (2).
    Show/hide table

    Illustration 21	g02581456

42. Install valve group (2) and bolts (1) to the piston pump.

End By:

1. Install the piston pump.