773D Off-Highway Truck and 775D Quarry Truck Hydraulic System Caterpillar

Illustration 1	g00514007

(1) Torque for eight bolts ... 3.00 ± 0.25 N·m (26.552 ± 2.213 lb in)

Illustration 2	g00514009
Section A-A

(2) 121-2052 Spring

Length under test force ... 8.0 mm (0.32 inch)

Test force ... 17.72 ± 0.53 N (3.984 ± 0.119 lb)

Free length after test ... 12.7 mm (0.50 inch)

Outside diameter ... 10.312 mm (0.4060 inch)

(3) 121-2051 Spring

Length under test force ... 46.0 mm (1.81 inch)

Test force ... 21.00 ± 0.63 N (4.721 ± 0.142 lb)

Free length after test ... 53.53 mm (2.108 inch)

Outside diameter ... 15.24 mm (0.600 inch)

(4) 118-5087 Spring

Length under test force ... 50.0 mm (1.97 inch)

Test force ... 243 ± 19 N (55 ± 4 lb)

Free length after test ... 63.5 mm (2.50 inch)

Outside diameter ... 35.56 mm (1.400 inch)

(5) 118-5086 Spring

Length under test force ... 55.0 mm (2.17 inch)

Test force ... 438 ± 35 N (98 ± 8 lb)

Free length after test ... 76.2 mm (3.00 inch)

Outside diameter ... 49.2 mm (1.94 inch)

Illustration 3	g00514011
View B-B

(6) 5J-4664 Spring

Length under test force ... 29.0 mm (1.14 inch)

Test force ... 38 ± 4 N (8.6 ± 0.9 lb)

Free length after test ... 36.3 mm (1.43 inch)

Outside diameter ... 12.70 ± 0.41 mm (0.500 ± 0.016 inch)

(7) 1P-6744 Spring

Length under test force ... 20.57 mm (0.810 inch)

Test force ... 63.5 ± 5.1 N (14.28 ± 1.14 lb)

Free length after test ... 24.03 mm (0.946 inch)

Outside diameter ... 14.27 mm (0.562 inch)

(8) Low pressure relief valve setting ... 3450 ± 350 kPa (500 ± 51 psi)

(9) High pressure relief valve setting ... 18950 ± 520 kPa (2750 ± 75 psi)

(10) 112-4397 Spring

Length under test force ... 37.47 mm (1.475 inch)

Test force ... 43.34 ± 3.00 N (9.743 ± 0.674 lb)

Free length after test ... 40.0 mm (1.57 inch)

Outside diameter ... 12.50 mm (0.492 inch)

(11) 2J-6089 Spring

Length under test force ... 36.25 mm (1.427 inch)

Test force ... 278 ± 14 N (62 ± 3 lb)

Free length after test ... 44.12 ± 0.50 mm (1.737 ± 0.020 inch)

Outside diameter ... 12.50 mm (0.492 inch)

(12) Torque for the nut ... 60 ± 10 N·m (44 ± 7 lb ft)

(13) Torque for the nut ... 60 ± 10 N·m (44 ± 7 lb ft)

Illustration 4	g00514012
View C-C

Illustration 5	g00514013
Section D-D

(14) 6J-3380 Spring

Length under test force ... 60.5 mm (2.38 inch)

Test force ... 653.9 ± 51.6 N (147.0 ± 11.6 lb)

Free length after test ... 86.6 mm (3.41 inch)

Outside diameter ... 30.18 mm (1.188 inch)

(15) Torque for plug ... 125 ± 15 N·m (92 ± 11 lb ft)

(16) 8B-4624 Shim

Quantity ... 4

Thickness ... 0.81 mm (0.032 inch)

Pressure change with one shim ... 30 kPa (4 psi)

(17) Rear brake oil cooler relief valve

Relief valve pressure setting ... 586 ± 14 kPa (85 ± 2 psi)

Torque for valve body ... 185 ± 15 N·m (136 ± 11 lb ft)

Illustration 6	g00514014
Section E-E

(18) 7S-8491 Spring

Length under test force ... 25.4 mm (1.00 inch)

Test force ... 19.2 ± 1.6 N (4.31 ± .35 lb)

Free length after test ... 41.1 mm (1.62 inch)

Outside diameter ... 30.18 mm (1.188 inch)