D8R Series II Track-Type Tractor Power Train Caterpillar

Steering Differential and Brake - Disassemble

Usage:

Disassembly Procedure

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Table 1
Required Tools
Tool	Part Number	Description	Qty
A	138-7573	Link Bracket	2
B	3K-4897	Spring Pin	8
C	6V-4072	Spanner Wrench	1
D	9S-9154	Step Plate	1
	6V-3009	Bar	1
	8S-6470	Forcing Screw (3/4 inch by 16 by 4 inch)	1
	8S-5133	Plug	1
	5P-8245	Washer (3 mm by 25.5 mm)	4
	1D-4719	Nut (1/2 inch by 13)	2
	2H-6488	Bolt (1/2 inch by 13 by 5 inch)	2
E	9S-9154	Step Plate	1
	6V-3009	Bar	1
	8S-6470	Forcing Screw (3/4 inch by 16 by 4 inch)	1
	8S-5133	Plug	1
	5P-8245	Washer (3 mm by 25.5 mm)	4
	1D-4719	Nut (1/2 inch by 13)	2
	1D-4574	Bolt (1/2 inch by 13 by 6 inch)	2
	8H-0663	Bearing Puller	1
F	138-7575	Link Bracket	3
G	8B-7550	Leg	2
	8B-7559	Adapter	2
	3H-0465	Plate	4
	1P-0498	Plate	1
	1B-4207	Nut (3/4 inch by 16)	2
	5H-9976	Forcing Screw (1 inch by 14 by 5 3/4 inch)	1
	5B-0637	Nut (1 inch by 14)	1
	8H-0684	Ratchet Wrench	1
	8B-7563	Handle	1
	5F-7353	Washer (Thrust)	1
	8B-7548	Push-Puller Tool Gp	1

Start By:

Remove the left final drive, the steering differential, and the brake. Refer to Disassembly and Assembly, "Final Drive, Steering Differential, and Brake (Left Side) - Remove" in this module.

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Illustration 1	g00619455

Remove three bolts and washers (1).
Remove two bolts (2).
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Illustration 2 g00619457

Note: The planetary carrier weighs 48 kg (105 lb).
Install tool (A) and a hoist.
Remove sliding carrier (3).
Remove tool (A).
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Illustration 3 g00619458
Remove the remaining two bolts (2) and slinger (4) from planetary carrier (7).
Remove retaining ring (5), the thrust ring, and planetary carrier (7) from ring gear (6).
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Illustration 4 g00619468
Remove seal ring (9) from carrier (7).
Use a hammer and a punch to push pin (10) in shaft (8).
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Illustration 5 g00619469
Remove shaft (8), planetary gear (11), discs (13), and bearing (12) from planetary carrier (7).
Remove pin (10) from shaft (8).
Repeat Steps 9 through 11 for the three remaining planetary gears.
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Illustration 6 g00619471
Remove sun gear (14) from planetary carrier (15).
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Illustration 7 g00619478
Remove three bolts (16), plate (17), and gear (18) from the carrier.
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Illustration 8 g00619479
Use tool (B) to compress the retaining ring that holds carrier (15) in ring gear (6).
Separate carrier (15) from ring gear (6).
Remove the retaining ring from carrier (15).
Use a hammer and a punch to push pin (20) in shaft (19).
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Illustration 9 g00619480
Remove shaft (19), planetary gear (21), discs (23), and bearing (22) from planetary carrier (15).
Remove pin (20) from shaft (19).
Repeat Steps 18 through 20 for the two remaining planetary gears.
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Illustration 10 g00619481
Place a bolt in the teeth of pinion gear (24) in order to prevent movement.
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Illustration 11 g00619482
Bend the tang on lock washer (26) away from nut (28).
Use tool (C) to remove nut (28) from the pinion.
Remove lockwasher (26) and washer (25) from the pinion.
Remove the bolt and the washer (27).
Remove carrier (29) from the support bracket.
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Illustration 12 g00619487
Use tool (D) to force pinion (24) from bearing cone (30) and carrier (29).
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Illustration 13 g00619484
Use tool (E) to remove bearing cone (31) from pinion (24).
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Illustration 14 g00619488
Remove bearing cups (32) from carrier (29).
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Illustration 15 g00619489
Remove twelve bolts and washers (33).
Remove support bracket (34) and shims (35) from the housing.
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Illustration 16 g00619490
Remove eighteen bolts and washers (36).
Remove bevel gear (37) from housing (38).
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Illustration 17 g00619491

Note: The brake housing weighs 150 kg (335 lb).

Attach tool (F) and a hoist to brake housing (39).

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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.

Remove two bolts and washers (40).
Remove brake housing (39) from the final drive housing (41).
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Illustration 18 g00619493
Remove three bolts and washers (42).
Remove retainer (52) and thrust washer (51).
Remove hub (48), four friction discs (43), and the three brake plates.
If necessary, remove ring (44) from hub (48).

Remove thrust washer (54).

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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.

Remove six bolts and washers (45) slowly. Remove six bolts and washers (45) evenly.
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Illustration 19 g00619494
Remove retainer (50), piston (57), spring (56), ring (55), and O-ring seal (59) from brake housing (39).
Remove shuttle valve (67).
Remove seal ring (53) from retainer (50).
Remove ring (60) and seal ring (58) from piston (57).
Remove six bolts and washers (46) and remove plate (49) and shims (47).
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Illustration 20 g00619495
Use tool (G) to separate brake housing (39) and bearing cone (61) from housing (38).
Remove bearing cone (61).
Note: Brake housing (39) weighs 77 kg (170 lb). Housing (38) weighs 25 kg (55 lb).
Attach a hoist and tool (F) to brake housing (39).
Remove brake housing (39) from housing (38).
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Illustration 21 g00619496

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NOTICE

The component will be destroyed if the component is removed.
If necessary, remove bearing cone (62) from housing (38).
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Illustration 22 g00619498
Remove bearing cups (63) and (65), spacer (66), and retaining ring (64) from brake housing (39).