Komatsu PC600LC-7 Manual page 92

STRUCTURE, FUNCTION AND MAINTENANCE STANDARD
SERVO VALVE
1. Servo valve (No. 2 front)
P1 : Main pump pressure IN port
P2 : Main pump pressure IN port
PAC : Servo actuator port
PDR : Servo valve drain OUT port
PPO : Servo basic pressure IN port
PECN : CO+NC valve output pressure IN port
10-60
HYDRAULIC PUMP (PISTON PUMP)
1. Servo valve
PC600, 600LC-7