Komatsu PC88MR-10 Shop Manual page 150

10 Structure and function
Control valve
Arm valve
7. Suction valve
8. Suction valve
9. Spool
10. Pressure compensation valve R
11. Pressure compensation valve F
Bucket valve
12. Suction valve
13. Suction valve
14. Spool
15. Pressure compensation valve R
16. Pressure compensation valve F
Service valve
17. Port relief valve
18. Port relief valve
19. Spool
20. Pressure compensation valve R
21. Pressure compensation valve F
F: Flow control valve
R: Pressure reducing valve
10-72 PC88MR-10