777G Off-Highway Truck Hydraulic and Braking System Caterpillar

Illustration 1	g02286833

(1) 355-9679 Service and Parking Brake Gp

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Section A-A

(2) Assembled brake pack

Thickness of six new discs, five new plates, and two new damper assemblies ... 56.26 ± 1.60 mm (2.215 ± 0.063 inch)

Thickness of one new 9W-7017 Friction Disc ... 5.08 ± 0.13 mm (0.200 ± 0.005 inch)

Thickness of one new 163-9366 Outer Plate ... 2.413 ± 0.064 mm (0.0950 ± 0.0025 inch)

Thickness of one new 7D-3013 Damper ... 6.86 ± 0.25 mm (0.270 ± 0.010 inch)

Note: Install one damper assembly so that the facing material faces toward the endplate. Install the other damper assembly so that the facing material faces toward the service piston.

Note: 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.

(3) 9D-6093 Spring (outer)

Quantity ... 16

Test length ... 90.5 mm (3.56 inch)

Test force ... 4235 ± 254 N (952 ± 57 lb)

Free length after test ... 116.5 mm (4.59 inch)

Outside diameter ... 46.02 mm (1.81 inch)

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Section B-B

Illustration 4	g02287115
Section C-C

(4) 9D-9118 Spring Guide

(5) 9D-9121 Spring (return)

Quantity ... 4

Test length ... 74.90 mm (2.95 inch)

Test force ... 890 ± 27 N (200 ± 6 lb)

Free length after test ... 91.14 mm (3.588 inch)

Outside diameter ... 26.59 mm (1.05 inch)

Illustration 5	g02287315

(6) Torque for nine studs ... 65 ± 10 N·m (50.0 ± 7.0 lb ft)

(7) Torque for five studs ... 110 ± 20 N·m (81 ± 15 lb ft)

Note: Apply blue Loctite 242 removable thread locker to the threads of studs (7).

(8) Torque for five hat nuts ... 270 ± 40 N·m (199 ± 30 lb ft)

Note: Apply blue Loctite 242 removable thread locker to the threads of hat nuts (8).

Note: Tighten five hat nuts (8) in a crisscross pattern to the specified torque. Ensure that the piston housing is seated against the anchor.

(9) Torque for six bolts ... 270 ± 40 N·m (199 ± 30 lb ft)

Note: Tighten six bolts (9) in a crisscross pattern to the specified torque.

Note: Retighten five hat nuts (8) in a crisscross pattern to 270 ± 40 N·m (199 ± 30 lb ft).

Note: Retighten six bolts (9) in a crisscross pattern to 270 ± 40 N·m (199 ± 30 lb ft).