D6N Track-Type Tractor Power Train Caterpillar

Assembly Procedure

Reference: Refer to Specifications, "Differential Drive and Brake Group"
in the Service Manual for your machine.

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Illustration 1	g00824415

1. Install O-ring seal (63) in brake housing (42).

   Note: If bearing cone (65) was removed, a new bearing cone must be installed.

2. Raise the temperature of bearing cone (65) to a maximum temperature of 135 °C (275 °F).

3. Install bearing cone (65) on housing (41).

4. Lower the temperature of bearing cups (62) and (64).

5. Install bearing cups (62) and (64) in brake housing (42).

   Note: If bearing cone (61) was removed, a new bearing cone must be installed.

6. Raise the temperature of bearing cone (61) to a maximum temperature of 135 °C (275 °F).

7. Install bearing cone (61) in housing (41).
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   Illustration 2	g00993935

8. Attach Tooling (F) and a suitable lifting device to brake housing (42).

9. Install brake housing (42) in housing (41). The weight of brake housing (42) is approximately 77 kg (170 lb). The weight of housing (41) is approximately 25 kg (55 lb).
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   Illustration 3	g00992013

10. Install plate (57) and three bolts (56).

11. Install Tooling (K) on plate (57). Do not install the shims at this time.

12. Position brake housing (42) on wood blocks to raise housing (41) off the floor.

13. Use Tooling (K) to rotate housing (41).

14. Use Tooling (K) to measure the rotational torque. Tighten three bolts (56) equally until the proper rotational torque is reached. The rotational torque should be 2.25 N·m (19.914 lb in) to 4.0 N·m (35.40 lb in).

15. Remove Tooling (K).
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    Illustration 4	g00992026

16. When the rotational torque is correct, use a feeler gauge to measure the Gap (X) between the housing and plate (57) in three places. Average the three measurements to determine the correct shim pack thickness.

17. Remove three bolts (56) and plate (57).

18. Position correct shim pack (58) and plate (57) on the housing.

19. Install three bolts (56). Tighten three bolts (56) equally.
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    Illustration 5	g00991881

20. Use Tooling (K) to recheck the rotational torque.

21. Remove Tooling (K).

22. Install three remaining bolts (56) and tighten three remaining bolts (56).
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    Illustration 6	g00831715

23. Install spring (60) and piston (59) in brake housing (42).
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    Illustration 7	g00824351

24. Install ring seal (55), ring (54), and retainer (53) in brake housing (42).

25. Install bolts (52).
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    Illustration 8	g00824819

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    Illustration 9	g00824349

26. Install thrust washer (51).

27. Install ring (50) in hub (48).

28. Install friction discs and brake plates (49). Install hub (48).

29. Install thrust washer (47) and retainer (46).

30. Install bolts and washers (45).
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    Illustration 10	g00993964

31. Attach Tooling (F) and a suitable lifting device to brake housing (42).

32. Install brake housing (42) in final drive housing (44). The weight of brake housing (42) is approximately 150 kg (335 lb).

33. Install bolts (43).
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    Illustration 11	g00824265

34. Install bevel gear (40) in housing (41).

35. Install bolts (39).

36. Install shims (38) and support bracket (37) in the housing.

37. Install bolts (36).
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    Illustration 12	g00824263

38. Lower the temperature of bearing cups (35). Install bearing cups (35) in carrier (31).
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    Illustration 13	g00831777

39. Heat bearing cone (34) to a maximum temperature of 135 °C (275 °F).

40. Install bearing cone (34) on pinion (27).

41. Raise the temperature of bearing cone (33) to a maximum temperature of 135 °C (275 °F).

42. Install pinion gear (27) in carrier (31) and bearing cone (33).
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    Illustration 14	g00991945

43. Install washer (30) and lockwasher (29) in the pinion.

44. Install nut (28) in the pinion.

45. Position pinion (27) in a soft jawed vise.

46. Use Tooling (C) to tighten nut (28) and preload the bearings.
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    Illustration 15	g00994001

47. Position carrier (31) on two wood blocks.

48. Use Tooling (J) to measure the rotational torque. The correct rotational torque is 0.3 N·m (2.7 lb in) to 1.35 N·m (11.949 lb in).

49. Bend the tang on lock washer (29) in one of the four slots in nut (28). Refer to illustration 14.
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    Illustration 16	g00831845

50. Position the pinion and carrier (31) on the support bracket.

51. Install bolts (32).
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    Illustration 17	g00991985

52. Use Tooling (L) to check the backlash of pinion gear (27). Measure the backlash at three equally spaced teeth on pinion (27). Average the three measurements. The correct backlash is 0.210 ± 0.075 mm (0.0083 ± 0.0030 inch). If necessary, remove support bracket (37) to add or remove shims from shim pack (38).
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    Illustration 18	g00823872

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    Illustration 19	g00832063

53. Install bearing (25) in planetary gear (22).

54. Position planetary gear (22) and discs (26) in planetary carrier (18).

55. Install shaft (24) in planetary carrier (18).

56. If the rubber in pin (23) is damaged, replace the pin.

57. Align the hole in shaft (24) with the hole in planetary carrier (18).

58. Install pin (23). Install pin (23) so that the end of the pin (23) is even with the surface of planetary carrier (18).

59. Repeat Steps 53 through 58 for the remaining planetary gears.

60. Install the retaining ring in planetary carrier (18).

61. Connect planetary carrier (18) and ring gear (6).

62. Use Tooling (B) to compress the retaining ring that holds planetary carrier (18) in ring gear (6).

63. Install gear (21), plate (20), and bolts (19) in planetary carrier (18).

64. Tighten bolts (19) to a torque of 50 ± 10 N·m (37 ± 7 lb ft).
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    Illustration 20	g00823759

65. Install spacer (17).

66. Install retaining ring (16), sun gear (15), and lock ring (14) into planetary carrier (18).
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    Illustration 21	g00823775

67. Install bearing (13), discs (8), planetary gear (9), and shaft (11) in planetary carrier (7).

68. Use a hammer and a punch to push pin (12) in shaft (11).

69. Install O-ring seal (10) on planetary carrier (7).
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    Illustration 22	g06187075

70. Install planetary carrier (7), thrust ring (5A), and retaining ring (5) in ring gear (6).

71. Install slinger (4) and remaining bolts (2) in planetary carrier (7).

72. Apply a coat of Tooling (M) to the face of slinger (4) that comes in contact with planetary carrier (7).
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    Illustration 23	g00823691

73. Install Tooling (A) and a suitable lifting device.

74. Install sliding carrier (3). The weight of sliding carrier (3) is approximately 48 kg (105 lb).

75. Remove Tooling (A).

End By:

1. Install the left-hand final drive, the steering differential, and the brake. Refer to Disassembly and Assembly, "Final Drive, Steering Differential, and Brake (Left Side) - Install"
   .