Komatsu Galeo PC138US-8 Shop Manual page 153

10 Structure, function and maintenance standard
1. Swing valve
2. Blade valve
3. Left travel valve
4. Right travel valve
5. Boom valve
6. Arm valve
7. Bucket valve
8. Service valve
9. Swing spool
10. Blade spool
11. Left travel spool
12. Right travel spool
13. Boom spool
14. Arm spool
15. Bucket spool
16. Service spool
17. Pressure compensation valve
18. Suction valve
19. LS service valve
20. Merge-divider valve
21. Arm regeneration valve
22. Self pressure reducing valve
23. Travel junction valve
24. Lift check valve
25. Cooler bypass valve
26. Boom hydraulic drift prevention valve
27. Swing bleeding valve
28. Suction safety valve
Set pressure: 36.8 MPa {375 kg/cm²}
29. Suction safety valve
Set pressure: 24.5 MPa {250 kg/cm²}
30. Suction safety valve
Set pressure: 35.8 MPa {365 kg/cm²}
31. Main relief valve
Set pressure: 34.8 MPa {355 kg/cm²}
32. Unload valve
PC138US, USLC-8
SEN02549-02
19