777F Off-Highway Truck Hydraulic System Caterpillar

Illustration 1	g00645093

(1) Torque for 23 nuts ... 790 ± 40 N·m (583 ± 30 lb ft)

(2) Torque for 23 studs ... 260 ± 40 N·m (192 ± 30 lb ft)

(3) 2A-6462 Spacer

Thickness of one new 2A-6462 Spacer ... 12.0 ± 0.5 mm (0.47 ± 0.02 inch)

Illustration 2	g00991281
Section A-A

(4) Assembled brake pack

Thickness of 12 new 8E-2183 Friction Discs, 12 new 8X-4437 Plates, and one new 8X-4435 Damper ... 96.78 ± 2.57 mm (3.810 ± 0.101 inch)

Thickness of one new 221-0775 Friction Disc ... 5.08 ± 0.13 mm (0.200 ± 0.005 inch)

Thickness of one new 8X-4437 Plate ... 2.413 ± 0.064 mm (0.0950 ± 0.0025 inch)

Thickness of one new 8X-4435 Damper ... 6.86 ± 0.24 mm (0.270 ± 0.009 inch)

Note: Install the damper assembly so that the facing material faces toward the brake piston.

(5) 4F-9503 Spring

Quantity ... 10

Test length ... 36.5 mm (1.44 inch)

Test force ... 144 ± 12 N (32.4 ± 2.6 lb)

Free length after test ... 47.6 mm (1.87 inch)

Outside diameter ... 15.9 mm (0.63 inch)

Illustration 3	g00991290
View B-B

Note: Install purge screw (6) and adapters toward the front of the machine.

(7) Torque for 29 bolts ... 300 ± 15 N·m (221 ± 11 lb ft)

Note: Install plug (8) toward the back of the machine.