D250E Series II and D300E Series II Articulated Trucks Steering, Suspension, and Body Hoist Hydraulic Systems Caterpillar

Illustration 1	g00850224

Relief pressure (raise) ... 20700 ± 340 kPa (3002 ± 49 psi)

Relief pressure (lower) ... 6900 ± 340 kPa (1000 ± 49 psi)

Note: Test the valve at 49° ± 3°C (120° ± 5° F).

Note: Set 22500 kPa (3000 psi) before 6900 kPa (1000 psi).

(1) Torque for installing the relief valve ... 110 ± 5 N·m (74 ± 4 lb ft)

(2) Lubricate the seal lightly with clean hydraulic fluid.

(3) Torque for the relief valve body ... 110 ± 10 N·m (81 ± 7 lb ft)

(4) 8H-3532 Spring

Test force ... 95 ± 7 N (21 ± 1.5 lb)

Test length ... 25.4 mm (1 inch)

Free length after test ... 42 mm (1.6535 inch)

Outside diameter ... 11.93 mm (0.47 inch)

(5) 171-5910 Spring

Test force ... 129.3 ± 10.2 N (29.1 ± 2.3 lb)

Test length ... 33.27 mm (1.31 inch)

Free length after test ... 36.09 mm (1.42 inch)

Outside diameter ... 11.68 mm (0.45 inch)

(6) Change the thickness of the shim pack in order to set relief pressure for raising the body.

(7) Change the thickness of the shim pack in order to set relief pressure for lowering the body.