784C, 785C and 785C HAA Off-Highway Truck/Tractors Hydraulic System Caterpillar

Illustration 1	g00493893
Top View

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

Illustration 2	g00493895
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 ... 35.58 mm (1.401 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	g00103227
View B-B

Illustration 4	g00103229
Section C-C

Illustration 5	g00103234
Section D-D

(6) 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)

Illustration 6	g00103235
Section E-E

(7) Torque for the screen assembly ... 13 ± 3 N·m (9.6 ± 2.2 lb ft)

Illustration 7	g00103237
View F-F

(8) 132-7102 Pulled Unit Counterbalance Valve

Cracking pressure ... 6900 + 700 - 0 kPa (1000 + 100 - 0 psi)

Illustration 8	g00103238
Section G-G

(9) Rear brake oil cooler relief valve

Relief valve pressure setting ... 790 ± 20 kPa (115 ± 3 psi)

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

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

(11) 8B-4624 Shim

Quantity ... 5

Thickness ... 0.81 mm (0.032 inch)

Note: Adjust the number of shims here.

(12) 8B-4624 Shim

Quantity ... 7

Thickness ... 0.81 mm (0.032 inch)

Note: Do not adjust the number of shims here.

(13) 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 ... 34.95 mm (1.376 inch)

(14) 132-2051 Pulled Unit Dual Stage Relief Valve

(15) Apply sealant to the threads of the plug.