Komatsu PC600LC-7 Manual page 90

STRUCTURE, FUNCTION AND MAINTENANCE STANDARD
No. 2 main pump
PSV1 : Servo valve basic pressure port
PSV2 : Servo valve basic pressure port
PSV1A : Servo piston output port
PSV1B : Servo valve output port
PSV2A : Servo piston output port
PSV2B : Servo valve output port
10-58
HYDRAULIC PUMP (PISTON PUMP)
PC600, 600LC-7