D8R and D8T TRACK-TYPE TRACTORS Machine Systems Caterpillar

Transmission Planetary

Usage:

D8R DWJ

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Illustration 1	g06152809

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Table 1
Specification for 387-6728 Transmission Planetary Gp
Item	Qty	Part	Specification Description
1	Thickness of five new friction discs and four new plates is 47.95 ± 0.72 mm (1.888 ± 0.028 inch).
	5	9P-7390 Friction Disc	Thickness of one new friction disc is 5.59 ± 0.08 mm (0.220 ± 0.003 inch).
	4	6I-8500 Plate	Thickness of one new Plate is 5.00 ± 0.08 mm (0.197 ± 0.003 inch).
2	Thickness of five new friction discs and four new plates is 47.95 ± 0.72 mm (1.888 ± 0.028 inch).
	5	9P-7390 Friction Disc	Thickness of one new friction disc is 5.59 ± 0.08 mm (0.220 ± 0.003 inch).
	4	6I-8500 Plate	Thickness of one new Plate is 5.00 ± 0.08 mm (0.197 ± 0.003 inch).
3	Thickness of three new friction discs and two new plates is 26.77 ± 0.46 mm (1.054 ± 0.018 inch).
	3	370-9775 Friction Disc	Thickness of one new friction disc is 5.59 ± 0.10 mm (0.220 ± 0.004 inch).
	2	6I-8500 Plate	Thickness of one new Plate is 5.00 ± 0.08 mm (0.197 ± 0.003 inch).
4	Thickness of two new friction discs and one new plate is 16.18 ± 0.28 mm (0.637 ± 0.011 inch).
	2	370-9775 Friction Disc	Thickness of one new friction disc is 5.59 ± 0.10 mm (0.220 ± 0.004 inch).
	1	6I-8500 Plate	Thickness of one new Plate is 5.00 ± 0.08 mm (0.197 ± 0.003 inch).
5	Thickness of four new friction discs and three new plates is 31.80 ± 0.64 mm (1.252 ± 0.025 inch).
	4	370-9778 Friction Disc	Thickness of one new friction disc is 4.95 ± 0.10 mm (0.195 ± 0.004 inch).
	3	8P-1964 Plate	Thickness of one new plate is 4.00 ± 0.08 mm (0.157 ± 0.003 inch).
6	2	5M-3038 O-Ring Seal	Before assembly of each bearing, lubricate the groove and O-Ring Seal with oil immediately.
7	1	8M-5255 O-Ring Seal	Before assembly of each bearing, lubricate the groove and O-Ring Seal with oil immediately.
8	2	8M-5010 O-Ring Seal	Before assembly of each bearing, lubricate the groove and O-Ring Seal with oil immediately.
9	10	7H-7658 Spring	Length under test force is 105.57 mm (4.156 inch). Test force is 187 ± 15 N (42 ± 3 lb). Free length after test is 140.5 mm (5.53 inch).
B	4	7T-6581 Planetary Shaft	Diameter is 33.523 ± 0.006 mm (1.3198 ± 0.0002 inch).
C	4	7T-6578 Planetary Gear	Bore before assembly is 44.666 ± 0.008 mm (1.7585 ± 0.0003 inch).
D	10	6I-9788 Planetary Gear	Bore before assembly is 43.221 ± 0.010 mm (1.7016 ± 0.0004 inch).
E	5	112-5585 Planetary Shaft	Diameter is 35.255 ± 0.006 mm (1.3880 ± 0.0002 inch).
F	4	8P-1916 Planetary Gear	Bore before assembly is 34.399 ± 0.008 mm (1.3543 ± 0.0003 inch).
G	4	9G-0289 Planetary Shaft	Diameter is 26.439 ± 0.006 mm (1.0409 ± 0.0002 inch).

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Illustration 2	g06152811
Section A-A

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Table 2
Item	Qty	Part	Specification Description
10	4	1M-8657 Bolt	Torque to 115 ± 7 N·m (85 ± 5 lb ft).
11	20	382-6924 Spring	Length under test force is 36.97 mm (1.456 inch). Test force is 171.41 ± 17.10 N (38.53 ± 3.84 lb). Free length after test is 42.5 mm (1.67 inch).
12	6	4M-2442 Bolt	Torque to 115 ± 7 N·m (85 ± 5 lb ft).