785G Off-Highway Truck Systems Caterpillar

Service and Parking Brake (Front) - If Equipped

Usage:

785G RTL

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Illustration 1	g06214382

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Table 1
Item	Qty	Part	Specification description
1	5	9D-7989 Nut	Torque to 300 ± 15 N·m (221 ± 11 lb ft). Torque each nut (1) by one revolution in order to pull down the housing. When all of the nuts bottom out, tighten the nuts to the specified torque by using a crisscross pattern.
2	5	5P-4282 Taperlock Stud	Torque to 100 ± 15 N·m (74 ± 11 lb ft).
3	33	139-4774 Taperlock Stud	Torque to 260 ± 40 N·m (192 ± 30 lb ft).
4	33	9X-6417 Bolt	Torque to 310 ± 25 N·m (229 ± 18 lb ft).

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Illustration 2	g06214387

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Table 2
Item	Qty	Part	Specification description
5	1	9D-7367 Piston	Install one damper (6) with facing material towards service piston (5).
6	2	7D-3013 Damper	Thickness of one new damper is 6.86 ± 0.25 mm (0.270 ± 0.010 inch).
7	9	196-7866 Friction Disc	Thickness of one new friction disc is 5.08 ± 0.08 mm (0.200 ± 0.003 inch). At assembly, lubricate the friction discs with the oil that is used in the brakes. See the Operation and Maintenance Manual, "Lubricant Viscosities" for that information.
8	8	163-9366 Outer Plate	Thickness of one new plate is 2.413 ± 0.064 mm (0.0950 ± 0.0025 inch).
Thickness of nine new discs, eight new plates, and two new damper assemblies is 78.75 ± 1.73 mm (3.100 ± 0.068 inch).
9	35	0S-1625 Bolt	Torque to 40 ± 10 N·m (30 ± 7 lb ft). Turn and additional 60 degrees ± 5 degrees.
10	32	9D-6093 Spring (outer)	Length under test force is 90.5 mm (3.56 inch).
			Test force is 4235 ± 254 N (952 ± 57 lb).
			Free length after test is 116.5 mm (4.59 inch).
11	28	9D-6135 Spring (inner)	Length under test force is 90.5 mm (3.56 inch).
			Test force is 1535 ± 44 N (345 ± 10 lb).
			Free length after test is 115.49 mm (4.547 inch).
12	1	153-0195 Plate	Install one damper (6) with facing material towards end plate (12).
13	9	9D-7989 Nut	Torque to 300 ± 15 N·m (221 ± 11 lb ft). Torque each nut (7) by one revolution in order to pull down the housing. When all of the nuts bottom out, tighten the nuts to the specified torque by using a crisscross pattern.
14	9	5D-4809 Taperlock Stud	Torque to 100 ± 15 N·m (74 ± 11 lb ft).
15	4	9D-9121 Spring (return)	Length under test force is 74.9 mm (2.95 inch).
			Test force is 890 ± 27 N (200 ± 6 lb).
			Free length after test is 91.14 mm (3.588 inch).

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