572R Pipelayer Hydraulic System Caterpillar

Illustration 1	g00477505

(1) Torque for the vacuum breaker ... 75 ± 10 N·m (55 ± 7 lb ft)

Vacuum Relief ... 2 ± 1 kPa (0.29 ± 0.15 psi)

Pressure Relief ... 180 ± 21 kPa (26 ± 3 psi)

(2) 7B-3039 Spring for the drain valve

Length under test force ... 26.2 mm (1.03 inch)

Test force ... 15.6 ± 1.2 N (3.51 ± 0.27 lb)

Free length after test ... 36.6 mm (1.44 inch)

Outside diameter ... 19.8 mm (0.78 inch)

(3) Torque for the drain plug in the tank ... 68 ± 7 N·m (50 ± 5 lb ft)

(4) Torque for four bolts ... 30 ± 7 N·m (22 ± 5 lb ft)