M315D, M315D Series 2, M315D2, M317D Series 2 and M317D2 Wheeled Excavators Power Train Caterpillar

Assembly Procedure

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Illustration 1	g01135853

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Illustration 2	g01135855

1. Subtract the Dimension that is stamped on pinion assembly (22) from the Dimension that is stamped on axle assembly (4). The difference is Dimension (A).
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   Illustration 3	g01135856

2. Use a Tooling (F) to measure the thickness of bearing cup (26) and bearing cone (23). Record this Dimension as Dimension (B).

3. Subtract Dimension (B) from Dimension (A). The difference is Value (C). Value (C) is the thickness of the shims that are needed for the correct pinion depth.
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   Illustration 4	g01135858

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   Illustration 5	g01135861

4. Lower the temperature of bearing cup (27) and bearing cup (26).

   Note: The shims are installed behind bearing cup (27).

5. Install the amount of shims that were determined in Steps 1 through 3 into axle housing (4).

6. Use Tooling (G) to install bearing cup (27) into axle housing (4).

7. Install bearing cup (26).
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   Illustration 6	g01018522

8. Raise the temperature of bearing cone (25). Lower the temperature of pinion assembly (22).

9. Install bearing cone (25) onto pinion assembly (22).
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   Illustration 7	g01018582

10. Install spacer ring (24) onto pinion assembly (22).
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    Illustration 8	g01135870

11. Install pinion assembly (22) into axle housing (4).

12. Raise the temperature of bearing cone (23). Install bearing cone (23) onto pinion assembly (22).
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    Illustration 9	g06337233

13. Install screening plate (18A).
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    Illustration 10	g01135877

14. Install flange (19). Install washer (20) and nut (18).

15. Install Tooling (B) onto flange (19).
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    Illustration 11	g01135877

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    Illustration 12	g01135891

    Note: During the tightening of nut (18), make several full revolutions of pinion assembly (22) in both directions.

16. Use Tooling (B) to hold flange (19) and tighten nut (18) to a torque of 800 N·m (590 lb ft).

17. Use Tooling (N) to check the rolling torque at the pinion. Rolling torque should be 1 to 3 N·m (9 to 26 lb in). If the rolling torque is not correct change spacer ring (24).

    Note: When installing new bearings, adjust rolling torque to the higher side of the torque value.

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    Illustration 13	g01135877

18. Install Tooling (B). Remove nut (18), washer (20), flange (19), and Tooling (B).
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    Illustration 14	g01135935

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    Illustration 15	g06337770
    Ideal contact pattern

19. Rotate the input flange, roll the crown wheel over the input pinion in both directions several times. Remove the axle housing and the lift differential out of the axle drive housing. Compare the contact pattern with the example in Illustration 15. Once, the correct contact pattern is achieved install shaft seal (21).
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    Illustration 16	g01135877

20. Install flange (19). Install washer (20) and nut (18). Install Tooling (B). Tighten nut (18) to a torque of 800 N·m (590 lb ft).

21. Remove Tooling (B) from flange (19).
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    Illustration 17	g01018597

22. Install thrust washer (15) and side gear (14).
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    Illustration 18	g01018899

    Note: The tabs of the thrust washers (12) must be installed in the upward position.

23. Install spider gears (13), thrust washers (12), and spider assembly (11).
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    Illustration 19	g01008037

24. Install side gear (10) and thrust washer (9).
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    Illustration 20	g01018901

25. Install case (8) onto differential (3).
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    Illustration 21	g01018902

    Note: For M16x1.5 bolts, apply Tooling (P) to bolts (7).

26. Install bolts (7) into differential (3). For M12x1.5 bolts, tighten bolts (7) to a torque of 145 N·m (107 lb ft). For M16x1.5, tighten bolts (7) to a torque of 300 N·m (221 lb ft).
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    Illustration 22	g01018903

27. Raise the temperature of bearing cone (6) and bearing cone (5).

28. Install bearing cone (6) and bearing cone (5).
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    Illustration 23	g01018904

29. Install shim (28A) (not shown) and bearing cup (28) into axle housing (4).
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    Illustration 24	g01135958

30. Install bearing cup (29) into Tooling (K).
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    Illustration 25	g01135961

31. Install differential (3) into axle housing (4).
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    Illustration 26	g01135969

32. Install Tooling (K) onto differential (3) and axle housing (4).

    Note: During the adjustment of Tooling (K), make several full revolutions of pinion assembly (22) in both directions.

33. Adjust Tooling (K) until differential (3) is free of play and free of pressure. Tighten the lock bolt.
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    Illustration 27	g01135979

34. Install Tooling (L) to the bore of the differential shaft.

35. Install Tooling (M) onto Tooling (K) and Tooling (L) to measure the backlash. The correct backlash is 0.15 to 0.27 mm (0.006 to 0.011 inch).

36. Change the thickness of shim (28A) from Step 29 to correct the backlash.

    Note: Do not loosen the lock bolt on Tooling (K). Remove Tooling (K) and bearing cup (29) as a unit.

37. Remove Tooling (M) and Tooling (L). Remove Tooling (K) and bearing cup (29) as a unit.
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    Illustration 28	g01136005

38. Use Tooling (F) and a piece of bar stock to measure from the bottom of bearing cup (29) to the flange of Tooling (K). Subtract the thickness of the bar stock and record this Dimension as Dimension (E).
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    Illustration 29	g01136081

39. Use Tooling (F) and a piece of bar stock to measure to the mounting surface of Tooling (K). Subtract the thickness of the bar stock and record this Dimension as Dimension (F).

40. Subtract Dimension (E) from Dimension (F) and record this value as Dimension (G).
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    Illustration 30	g01136129

41. Use Tooling (F) and a piece of bar stock to measure to the bottom of bearing cup (29). Subtract the thickness of the bar stock and record this Dimension as Dimension (H).
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    Illustration 31	g01136136

42. Use Tooling (F) and a piece of bar stock to measure to the surface of axle housing (1). Subtract the thickness of the bar stock and record this Dimension as Dimension (J).

43. Subtract Dimension (H) from Dimension (J) and record this value as Dimension (K).

44. Subtract Dimension (G) from Dimension (K) and record this value as Dimension (L).

45. Dimension (L) is the amount of shim that is required to set a bearing preload of 1 N·m (9 lb in) to 4 N·m (35 lb in).
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    Illustration 32	g01018917

46. Lower the temperature of bearing cup (29).

47. Install the amount of shim that is equal to Dimension (L). Install bearing cup (29) into axle housing (1).
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    Illustration 33	g01018916

48. Apply a marking compound to the ring gear of differential (3).
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    Illustration 34	g01135682

49. Install differential (3) into axle housing (4).
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    Illustration 35	g01135670

50. Attach a suitable lifting device to axle housing (1) and position axle housing (1). The weight of axle housing (1) is approximately 68 kg (150 lb). Install four equally spaced bolts (2).

51. Rotate the pinion several times in both directions to establish a contact pattern.

52. Remove bolts (2) and axle housing (1).
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    Illustration 36	g01135682

53. Remove differential (3) from axle housing (1).
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    Illustration 37	g01018512
    Correct pinion distance on the driven side.

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    Illustration 38	g01018573
    Correct pinion distance on the driving side.

54. Refer to Illustrations 37 and 38 for the correct tooth contact pattern.
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    Illustration 39	g01018575

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    Illustration 40	g01018576

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    Illustration 41	g01018574

55. Refer to Illustrations 39 and 40 for an incorrect tooth contact pattern. The pinion distance must be increased.
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    Illustration 42	g01018578

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    Illustration 43	g01018580

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    Illustration 44	g01018577

56. Refer to Illustrations 42 and 43 for an incorrect tooth contact pattern. The pinion distance must be decreased.
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    Illustration 45	g01135682

57. Install differential (3) into axle housing (4).
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    Illustration 46	g01136140

58. Install O-ring seal (30) onto axle housing (1).
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    Illustration 47	g01517039

59. Attach a suitable lifting device to axle housing (1) and position axle housing (1). The weight of axle housing (1) is approximately 68 kg (150 lb). Install bolts (2). Tighten bolts (2) to a torque of 440 N·m (325 lb ft).

60. Attach a suitable lifting device to the front axle assembly and remove the front axle assembly from Tooling (E). The weight of the front axle assembly is approximately 213 kg (470 lb).

End By:

1. Install the final drives, the carrier, and the hubs.

2. Install the front axle.