2. Shutdown SIS
Previous Screen
Product: TRACK-TYPE TRACTOR
Model: D8R TRACK-TYPE TRACTOR JR8
Configuration: D8R TRACK-TYPE TRACTOR JR800001-UP (MACHINE) POWERED BY C15 Engine
Disassembly and Assembly
D8R and D8T Track-Type Tractor Power Train
Media Number -M0076745-02 Publication Date -01/03/2018 Date Updated -12/03/2018
i05353222
Steering Planetary and Brake - Disassemble
SMCS - 4132-015
Disassembly Procedure
Table 1
Required Tools
Tool Part Number Description Qty
A 439-3940 Link Brackets 3
B 5J-0490 Bolts (1/2 - 13) 3
C 1P-0520 Driver Gp 1
Start By:
a. Remove the right hand final drive, the planetary group, and the brake.
Note: Orientation of brake and planetary assemblies. Mark the top of the planetary gears, the sun
gear, and the ring gear (if equipped) for assembly purposes.
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4. Illustration 3 g03390847
1. Position final drive (3), the planetary group, and brake hub (2) as shown in Illustration 3.
2. Remove two bolts (1) that hold the planetary group and brake hub (2) to final drive (3).
3. Install Tooling (B) in the hub of final drive (3).
4. Tighten Tooling (B) evenly to remove the planetary group and brake hub (1) from final
drive (3).
5. Attach Tooling (A) and a suitable lifting device to the planetary group and brake hub (2).
The weight of the planetary group and brake hub (2) is approximately 136 kg (300 lb).
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6. Personal injury can result from parts and/or covers under spring
pressure.
Spring force will be released when covers are removed.
Be prepared to hold spring loaded covers as the bolts are loosened.
6. Remove bolts (4).
7. Remove brake hub (2) from housing (6).
8. Remove the retaining ring and ring gear (5) from brake hub (2).
Illustration 6 g03391389
9. Remove four friction discs (7) and three brake plates from housing (6).
Illustration 7 g03391098
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7. Illustration 8 g03390855
10. Remove bolts (8) and plate (9).
Note: Do not allow carrier (11) to fall when carrier (11) is pressed from housing (6).
11. Use a suitable press and Tooling (C) to remove carrier (11) from housing (6).
12. Remove bearing cone (10) from housing (6).
Illustration 9 g00622127
13. Remove ring (14) from carrier (11).
14. Remove bolts (13).
15. Remove slinger (12) from carrier (11).
Note: Damage to bearing cone (15) will result if removed from carrier (11).
16. If necessary, remove bearing cone (15) from carrier (11).
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8. Illustration 10 g00622128
17. Use a hammer and a punch to push pin (17) in shaft (16).
Illustration 11 g00622142
18. Remove planetary shaft (16), planetary gear (19), thrust discs (20), and bearings (21) from
carrier (11).
19. Remove pin (17) from planetary shaft (16).
20. Repeat Steps 17 through 19 for remaining planetary gears (19).
21. Remove sun gear (18) from carrier (11).
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9. Illustration 12 g00622132
Personal injury can result from parts and/or covers under spring
pressure.
Spring force will be released when covers are removed.
Be prepared to hold spring loaded covers as the bolts are loosened.
22. Remove bolts (22).
23. Remove retainer (23) from piston (24).
Illustration 13 g00622155
24. If necessary, remove bearing cups (25) from retainer (23).
25. Remove seal ring (26) from retainer (23).
Illustration 14 g00622156
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10. 26. Remove piston (24) and O-ring seal (27) from the housing.
Illustration 15 g00622157
27. Remove seal ring (28) from piston (24).
28. Inspect the O-ring seals.
29. If necessary, replace the O-ring seals.
Illustration 16 g03391415
30. Remove spring (30) and ring (31) from housing (6).
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11. Illustration 17 g00622159
31. Remove shuttle valve (32) from the housing.
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All Rights Reserved.
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12. Shutdown SIS
Previous Screen
Product: TRACK-TYPE TRACTOR
Model: D8R TRACK-TYPE TRACTOR JR8
Configuration: D8R TRACK-TYPE TRACTOR JR800001-UP (MACHINE) POWERED BY C15 Engine
Disassembly and Assembly
D8R and D8T Track-Type Tractor Power Train
Media Number -M0076745-02 Publication Date -01/03/2018 Date Updated -12/03/2018
i05353533
Steering Planetary and Brake - Assemble
SMCS - 4132-016
Assembly Procedure
Table 1
Required Tools
Tool Part Number Description Qty
A 439-3940 Link Brackets 3
D - Loctite Hi-Temp Flange Sealant 1
Illustration 1 g00622159
1. Install shuttle valve (32) in the housing.
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13. Illustration 2 g03391415
Note: Orient spring (30) with the outer edge downward.
2. Install ring (31) and spring (30) in housing (6).
Illustration 3 g00622157
3. Apply clean oil to seal ring (28).
Note: Orient the seal ring (28) with the lip downward as shown in Illustration 3.
4. Install seal ring (28) in piston (24).
Illustration 4 g00622156
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14. 5. Install piston (24) and O-ring seal (27) in the housing.
Illustration 5 g00622155
6. Lower the temperature of bearing cups (25). Install bearing cups (25) in retainer (23).
Note: Orient seal ring (26) with the lip downward as shown in Illustration 5.
7. Install seal ring (26) in retainer (23). Apply clean oil to seal ring (26).
Illustration 6 g00622132
8. Install retainer (23) on piston (24). Align the oil passage in retainer (23) with the oil passage
and the O-ring seal in the housing. Install bolts (22).
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16. Illustration 7 g00622142
9. Install sun gear (18) in carrier (11).
10. Install bearings (21) in planetary gear (19).
11. Install thrust discs (20) and planetary gear (19) in carrier (11). Install planetary shaft (16).
Illustration 8 g03391005
Note: If the rubber in pin (17) is damaged, replace pin (17).
12. Align the hole in planetary shaft (16) with the hole in carrier (11) and install pin (17). Install
pin (17) until the pin is even with the surface of carrier (11).
13. Repeat Steps 10 through 12 for the remaining planetary gears.
Illustration 9 g00622127
Note: If bearing cone (15) was removed from planetary carrier (11), then a new bearing
cone (15) must be installed.
14. Raise the temperature of bearing cone (15) to a maximum of 135 °C (275 °F). Install
bearing cone (15) on carrier (11).
15. Apply Tooling (D) to the flange of slinger (12).
16. Install slinger (12) on carrier (11). Install bolts (13).
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17. 17. Install ring (14) in carrier (11).
Illustration 10 g03391440
18. Position housing (6) on carrier (11).
19. Raise the temperature of bearing cone (10) to a maximum of 135 °C (275 °F). Install
bearing cone (10) on carrier (11).
Illustration 11 g03391468
20. Position plate (9) on the carrier.
21. Install bolts (8).
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18. Illustration 12 g03391389
22. Install four friction discs (7) and the three brake plates into housing (6). Alternate friction
discs (7) and the brake plates.
Illustration 13 g03391254
Illustration 14 g03391247
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19. 23. Install ring gear (5) and the retaining ring in brake hub (2).
24. Position brake hub (5) on housing (6).
25. Install bolts (3).
Illustration 15 g03390847
Illustration 16 g03391241
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