Komatsu Galeo PC138US-8 Shop Manual page 147

10 Structure, function and maintenance standard
Arm valve
1. Pressure compensation valve F
2. Suction valve
3. Suction valve
4. Spool
5. Pressure compensation valve R
6. Regeneration valve
Bucket valve
7. Pressure compensation valve F
8. Suction valve
9. Suction valve
10. Spool
11. Pressure compensation valve R
Service valve
12. Pressure compensation valve F
13. Suction safety valve
14. Suction safety valve
15. Spool
16. Pressure compensation valve R
17. Suction safety valve
18. Pressure release plug
F: Flow control valve
R: Pressure reducing valve
No. Check item
19 Valve spring
PC138US, USLC-8
Standard size
Free length
Installed
× Outside
length
diameter
41.5 × 8.5 31.5
Criteria
Repair limit
Installed
Free length
load
5.88 N
—
{0.6 kg}
SEN02549-02
Unit: mm
Remedy
Installed If damaged or
load deformed,
replace spring
4.71 N
{0.48 kg}
13