CIPI UNDERCARRIAGE Arrangements: 3Q6662, 6Z7861, 6Z7885, 6Z7947, 6Z7957, 6Z7999, 9Q5044, 9Q5065, 9Q5082, 9Q5090, 9Q5093, 9Q5115, 9Q5118, 9Q5126, 9Q5135, 9Q5141, 9Q5168, 9Q5175, 9Q5206, 9Q5255, 9Q5259, 9Q5268, 9Q5412, 9Q5436, 9Q5464, 9Q5514, 9Q5617, 9 Caterpillar

Type "A" Final Drive Disassembly

Start By:

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

1. Thoroughly clean the outside of the final drive prior to disassembly.

2. 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

3. Fasten the final drive to Tooling (A), as shown. The combined weight of the final drive and final drive sprocket is 310 kg (682 lb).

4. Remove 20 bolts (1) and the washers that hold the cover in position.

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Illustration 2	g00708090

5. Fasten Tooling (B) and a hoist to cover (2), as shown. Remove the cover. The weight of the cover is 32 kg (71 lb).

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Illustration 3	g00708091

6. Remove thrust plate (3) from cover (2) .

7. Remove two plugs (4) from cover (2) .

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Illustration 4	g00708235

8. Remove O-rings (5) from both plugs (4) that were in the cover.

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Illustration 5	g00708092

9. Remove spacer (6) from carrier assembly (7) .

10. Remove sun gear (8) from carrier assembly (7) .

11. Remove carrier assembly (7) by lifting the carrier assembly straight up. The weight of the carrier assembly is 14 kg (31 lb).

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Illustration 6	g00708095

12. Disassemble carrier assembly (7), as follows.

    1. Drive spring pin (10) into planetary shaft (9) with a hammer and a punch.
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    Illustration 7	g00708144

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    Illustration 8	g00708218

    2. Remove planetary shaft (9) with spring pin (10) from the carrier assembly.

    3. Remove spring pin (10) from planetary shaft (9) with a hammer and a punch.

    4. Remove two thrust washers (11) and planetary gear (13) from the carrier assembly.

    5. Remove bearing (12) from planetary gear (13) .

13. Repeat Steps 12.a and 12.e in order to remove the other two planetary gears from the carrier assembly.

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Illustration 9	g00708162

14. Remove sun gear (14) from carrier assembly (15) .

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Illustration 10	g00708325

15. Remove spacer (16) .

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Illustration 11	g00708184

Note: It will be necessary to pry ring gears (17) away from main housing (18) in order to install the lifting slings.

16. Fasten lifting slings and a hoist to ring gears (17), as shown. Remove the ring gears from main housing (18). The weight of the ring gears is 45 kg (99 lb).

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Illustration 12	g00708360

17. Use a screwdriver or a chisel in order to separate the two ring gears (17) .

    Note: The two ring gears are held together only with 1U-8846 Sealant. It may be necessary to heat the ring gears in order to soften the sealant. Do not heat over 135 °C (275 °F) for more than thirty minutes.

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Illustration 13	g00708172

18. Slide a piece of steel bar stock between the planetary gears in carrier assembly (15), as shown.

19. Make sure that the bar stock is centered in the carrier assembly. Fasten a lifting sling and a hoist to the steel bar stock, as shown.

20. Slowly lift carrier assembly (15) from the final drive. The weight of the carrier assembly is 39 kg (86 lb).

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Illustration 14	g00708175

21. Disassemble carrier assembly (15), as follows.

    1. Drive spring pin (20) into planetary shaft (19) with a hammer and a punch.
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    Illustration 15	g00708370

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    Illustration 16	g00708220

    2. Remove planetary shaft (19) with spring pin (20) from the carrier assembly.

    3. Remove spring pin (20) from planetary shaft (19) with a hammer and a punch.

    4. Remove two thrust washers (21) and planetary gear (23) from the carrier assembly.

    5. Remove two bearings (22) from the planetary gear.

22. Repeat Steps 21.a through 21.e in order to remove the other two planetary gears from the carrier.

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Illustration 17	g00708186

23. Remove O-ring seal (24) from main housing (18) .

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Illustration 18	g00708187

24. Remove bolts (25) from gear (26) .

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Illustration 19	g00708202

25. Use Tooling (C) in order to remove gear (26) from main housing (18) .

    Note: The motor housing will separate from the main housing (18). Make sure that the motor housing is supported.

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Illustration 20	g00708211

26. Remove shims (27) from the main housing.

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Illustration 21	g00708212

27. Fasten Tooling (D) and a hoist to main housing (18), as shown.

28. Use a hammer and a punch in order to separate main housing (18) and the final drive sprocket from the motor housing (28). The combined weight of the main housing and final drive sprocket is approximately 82 kg (181 lb).

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Illustration 22	g00708214

29. Remove Duo-Cone seal (29) from motor housing (28) .

30. Remove alignment pins (30) .

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Illustration 23	g00708215

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Illustration 24	g00708216

31. Remove Duo-Cone seal (31) from main housing (18) .

32. Use Tooling (E) in order to remove bearings (32) and (33) from the main housing.

33. If necessary, remove the final drive sprocket from the main housing. Refer to Disassembly and Assembly, "Final Drive Sprocket - Remove and Install" in this manual for the removal of the final drive sprocket from the main housing.

Type "B" Final Drive Disassembly

Start By:

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

1. Thoroughly clean the outside of the final drive prior to disassembly.

2. 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 25	g00511587

3. Fasten the final drive to Tool (A), as shown. The combined weight of the final drive and final drive sprocket is 310 kg (683 lb).

4. Remove 20 bolts (1) and the washers that secure the cover to the final drive.

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Illustration 26	g00511600

5. Use a soft faced hammer and break the seal between cover (2) and the ring gear. Fasten Tool (B) and a hoist to cover (2), as shown. Remove the cover. The weight of the cover is 32 kg (71 lb).

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Illustration 27	g00511631

6. Remove thrust plate (5) from the cover.

7. Remove 12 socket heads bolts (3) and ring gear (4) from the cover.

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Illustration 28	g00511636

8. Remove sun gear (6). Remove carrier assembly (7) by lifting the carrier assembly straight up. The weight of the carrier assembly is approximately 14 kg (31 lb).

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Illustration 29	g00511640

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Illustration 30	g00572334

Note: Two spacers (8) are used with carrier assembly (7). One of the spacers fits on the top side of carrier assembly (7). The other spacer (8) is located in the carrier of carrier assembly (15) .

9. Remove spacer (8) from carrier assembly (7) .

Note: Planetary gears (11) might have oil grooves "L". Note the position of the oil grooves in relation to the carrier for assembly purposes.

10. Remove retaining ring (9) with Tool (C). Remove two thrust washers (10) and planetary gear (11) from the carrier. Remove bearing (12) from the planetary gear.

11. Repeat Step 10 in order to remove the other two planetary gears from the carrier.

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Illustration 31	g00511653

12. Use a screwdriver, and remove retaining ring (13) from the carrier. Remove sun gear (14) from the carrier.

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Illustration 32	g00511661

13. Use two people in order to remove carrier assembly (15). Remove the carrier assembly by pulling the carrier assembly straight up. The weight of the carrier assembly is approximately 25 kg (55 lb).

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Illustration 33	g00511682

Note: Spacer (16) may remain with carrier assembly (15), or the spacer may remain with carrier assembly (24). Refer to Step 19.

14. Remove spacer (16) from carrier assembly (15) .

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Illustration 34	g00511735

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Illustration 35	g00572352

Note: If spring pin (17) is recessed below the outside surface of the carrier, measure the depth of the spring pin and record this measurement for assembly purposes.

15. Drive spring pin (17) into planetary shaft (18) with a hammer and a punch.

Note: Planetary gears (20) might have oil grooves "M". Note the position of the oil grooves in relation to the carrier for assembly purposes.

16. Remove planetary shaft (18), two thrust washers (19) and planetary gear (20) from the carrier. Remove bearing (21) from the planetary gear. Remove spring pin (17) from planetary shaft (18) with a hammer and a punch.

17. Repeat Steps 15 and 16 in order to remove the other two planetary gears from the carrier.

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Illustration 36	g00511788

18. Use a screwdriver, and remove retaining ring (22). Remove sun gear (23) from the carrier.

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Illustration 37	g00511795
Typical example

19. If spacer (16) was not removed in Step 14, remove the spacer from carrier assembly (24) at this time.

20. Slide a piece of steel bar stock between the planetary gears in carrier assembly (24), as shown. Make sure that the bar stock is centered in the carrier assembly. Fasten a lifting sling and a hoist to the steel bar stock, as shown. Slowly lift carrier assembly (24) from the final drive. The weight of the carrier assembly is approximately 36 kg (80 lb).

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Illustration 38	g00511799
Typical example

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Illustration 39	g00572382

Note: If spring pin (25) is recessed below the outside surface of the carrier, measure the depth of the spring pin and record this measurement for assembly purposes.

21. Drive spring pin (25) into planetary shaft (26) with a hammer and a punch.

Note: Planetary gears (28) might have oil grooves "N". Note the position of the oil grooves in relation to the carrier for assembly purposes.

22. Remove planetary shaft (26), two thrust washers (27) and planetary gear (28) from the carrier. Remove two bearings (29) from the planetary gear. Drive spring pin (25) out of planetary shaft (26) with a hammer and a punch.

23. Repeat Steps 21 and 22 in order to remove the other planetary gears from the carrier.

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Illustration 40	g00511809

Note: It will be necessary to pry ring gear (30) away from main housing (31) in order to install the lifting slings.

24. Fasten lifting slings and a hoist to ring gear (30), as shown. Remove the ring gear from main housing (31). The weight of the ring gear is 48 kg (105 lb).

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Illustration 41	g00511825

25. Remove O-ring seal (32) from main housing (31) .

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Illustration 42	g00511857
Typical example

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Illustration 43	g00511869

26. Remove socket head bolts (33) from gear (34) .

27. Use Tooling (D) to remove gear (34) from the housing.

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Illustration 44	g00511872

28. Remove shims (35) from the housing.

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Illustration 45	g00511882

29. Fasten Tool (E) and a hoist to main housing (31), as shown. Separate the main housing and the final drive sprocket from the motor housing. The combined weight of the main housing and final drive sprocket is 105 kg (231 lb).

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Illustration 46	g00511906

30. Remove Duo-Cone seal (36) from the motor housing.

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Illustration 47	g00511934

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Illustration 48	g00511939

31. Remove Duo-Cone seal (37) from the main housing.

32. Use Tooling (F) to remove bearings (38) and (39) from the main housing.

33. If necessary, remove the final drive sprocket from the main housing. Refer to Disassembly and Assembly, "Final Drive Sprocket - Remove and Install" in this section for the procedure to remove the final drive sprocket from the main housing.