Komatsu PC600LC-7 Manual page 76

STRUCTURE, FUNCTION AND MAINTENANCE STANDARD
TVC VALVE
PPO : Servo basic pressure IN port
P1 : Main pump pressure IN port
P2 : Main pump pressure IN port
PDR : TVC valve drain OUT port
PE : TVC valve output pressure OUT port
10-44
HYDRAULIC PUMP (PISTON PUMP)
1. Spring
2. Spool
3. Piston
4. Piston
5. Sleeve
6. Piston
7. Body
8. Solenoid
PC600, 600LC-7