320C and 322C Excavators Attachment Hydraulic System – Travel Counterbalance Valve



Illustration 1 g00676261

Bench test of the relief valve

Pressure setting … 36300 ± 290 kPa (5260 ± 42 psi)
Input flow rate … 220 L/min (58 US gpm)

Relief valve pressure setting in machine … 36800 ± 1470 kPa (5337 ± 213 psi)

(1) Torque for two relief valves … 540 ± 50 N·m (400 ± 37 lb ft)

(2) Two 114-0516 Springs

Free length … 43.7 mm (1.72 inch)
Outside diameter … 19.5 mm (.77 inch)

(3) Two 114-0514 Springs

Free length … 26.0 mm (.02 inch)
Outside diameter … 14.1 mm (.56 inch)

(4) Torque for two plugs … 76 ± 8 N·m (56 ± 6 lb ft)

(5) Two 119-5362 Springs

Free length … 20.0 mm (.79 inch)
Outside diameter … 10.2 mm (.40 inch)

(6) Two 177-2591 Springs

Free length … 65.0 mm (2.56 inch)
Outside diameter … 34.0 mm (1.34 inch)

(7) Torque for two plugs … 31.0 ± 3.0 mm (1.22 ± .12 inch)

(8) Torque for eight bolts … 80 ± 8 N·m (59 ± 6 lb ft)