Komatsu PC500LC-10R Shop Manual page 485

30 TESTING AND ADJUSTING
REMARK
• Turn the adjustment screw clockwise when the work equipment speed is low (to increase the pump ab-
sorption torque). Turn it counterclockwise when the engine speed is low (to decrease the pump absorp-
tion torque).
• Adjustable range of adjustment screw (10) is as described below.
Counterclockwise: Within 1 turn
Clockwise: Within 1 turn
4.
Tighten the lock nut (9).
3
Lock nut (9):
27 to 34 Nm {2.8 to 3.5 kgm}
After the adjustment, see "METHOD FOR TESTING PC VALVE OUTLET PRESSURE (SERVO PISTON INLET
PRESSURE)" to check that PC valve outlet pressure (servo piston inlet pressure) is normal.
PC500LC-10R
TEST AND ADJUST OIL PRESSURE IN PUMP PC CONTROL CIRCUIT
30-79