330D, 336D, 336D2, 340D and 340D2 Excavators and 336D MHPU Mobile Hydraulic Power Unit Machine Systems Final Drive - Disassemble - Type-One Caterpillar

Disassembly Procedure

Start By:

1. Remove the final drive. Refer to Disassembly and Assembly, "Final Drive - Remove".

Note: Cleanliness is an important factor. Before the disassembly procedure, the thoroughly clean the exterior of the component. This will prevent dirt from entering the internal mechanism.

Note: Some of the images that are in this procedure do not show the sprocket assembly that is attached to the final drive housing. If necessary, the weights that are given include the weight of the sprocket assembly.

1. Put an alignment mark across the sections of the final drive for assembly purposes. The parts must be reinstalled in the part's original locations.

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Illustration 1	g00708089

2. Fasten the final drive to Tooling (A) , as shown. The weight of the final drive assembly is approximately 312 kg (688 lb).

3. Remove bolts (1) and the washers that hold the cover in position.

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Illustration 2	g00708090

4. Remove the setscrews from the cover. Fasten Tooling (B) and a suitable lifting device to cover (2) , as shown. Remove the cover. The weight of the cover is approximately 32 kg (70 lb).

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Illustration 3	g00879362

5. Remove bolts (3) . Remove gear (5) . Check plate (6) . Replace plate (6) if wear is shown. Remove plugs (4) from cover (2) .

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Illustration 4	g00879365

6. Remove O-ring seal (7) from plugs (4) .

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Illustration 5	g00780428

7. Remove gear (8) . Remove spacer (9) .

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Illustration 6	g00780432

8. Remove retaining ring (10) with Tooling (C) . Remove washer (11) . Remove gear (12) . Remove bearing assembly (13) . Remove second washer (11) .

9. Repeat Step 8 for the remaining two gear assemblies.

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Illustration 7	g00781401

10. Remove retaining ring (14) .

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Illustration 8	g00781407

11. Remove carrier assembly (15) .

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Illustration 9	g01389593

12. Use a suitable press in order to remove the shafts from carrier assembly (15) .

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Illustration 10	g00781412

13. Remove gear (16) . Remove spacer (17) .

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Illustration 11	g00781466

14. Remove retaining ring (18) .

15. Remove carrier assembly (19) .

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Illustration 12	g00879368

16. Disassemble carrier assembly (19) , as follows.

    1. Drive spring pin (20) into planetary shaft (21) with a hammer and a punch.
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    Illustration 13	g00781476

    2. Remove planetary shaft (21) .

    3. Remove spring pin (20) from planetary shaft (21) with a hammer and a punch.
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    Illustration 14	g00781516

    4. Remove thrust washers (22) and planetary gear (24) from the carrier assembly.

    5. Remove bearing (23) from planetary gear (24) .

17. Repeat Steps 16.a through 16.e for the other two planetary.

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Illustration 15	g00781529

18. Remove gear (25) . Remove spacer (26) .

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Illustration 16	g00781559

19. Remove carrier assembly (27) .

20. Use two people to remove carrier assembly (27) . The weight of the carrier assembly is approximately 38 kg (85 lb).

21. Disassemble carrier assembly (27) , as follows.
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    Illustration 17	g00781719

    1. Drive spring pin (29) into planetary shaft (28) with a hammer and a punch.
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    Illustration 18	g00781601

    2. Remove planetary shaft (28) .

    3. Remove spring pin (29) from planetary shaft (28) with a hammer and a punch.
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    Illustration 19	g00781607

    4. Remove thrust washers (30) and planetary gear (32) from the carrier assembly.

    5. Remove two bearings (31) from the planetary gear.

22. Repeat Steps 21.a through 21.e for the other two planetary gears.

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Illustration 20	g00781730

23. Use two people to remove gear (33) . The weight of gear is approximately 41 kg (90 lb).

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Illustration 21	g00781807

24. Remove O-ring seal (34) .

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Illustration 22	g01147650

25. Remove bolts (35A) and plates (35B) .

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Illustration 23	g01147651

26. Use Tooling (G) to remove dowel (37) from stopper plate (35) .

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Illustration 24	g01147759

27. Secure Tooling (D) to stopper plate (35) . Use Tooling (D) to remove stopper plate (35) .

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Illustration 25	g01147930

28. Use Tooling (E) and a suitable lifting device to remove housing (36) . The weight of housing (36) is approximately 100 kg (220 lb).

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Illustration 26	g01147951

29. Remove Duo-Cone seal (39A) from housing (38) .

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Illustration 27	g01147975

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Illustration 28	g01147934

30. Remove Duo-Cone seal (39B) from housing (36) .

31. Use Tooling (F) in order to remove bearings (40) and (41) from housing (36) .

32. If necessary, remove the final drive sprocket from the sprocket housing. Refer to Disassembly and Assembly, "Final Drive Sprocket - Remove and Install".