Komatsu PC130-8, Shop Manual

Page: 137 / 1043

10 Structure, function and maintenance standard SEN03774-01
PC130-8
9
1. LS selector valve
Swing valve
2. Pressure compensation valve F
3. Spool
4. Pressure compensation valve R
5. Swing bleeding valve
Left travel valve
6. Pressure compensation valve R
7. Suction valve
8. Suction valve
9. Spool
10. Pressure compensation valve F
11. LS check valve
Right travel valve
12. Pressure compensation valve F
13. Suction valve
14. Suction valve
15. Spool
16. Pressure compensation valve R
17. Travel junction valve + LS check valve
18. Unload valve
19. LS bypass valve
20. Merge-divider valve spool
F: Flow control valve
R: Pressure reducing valve
Unit: mm
No. Check item Criteria Remedy
21 Check valve spring
Standard size Repair limit
If damaged or
deformed,
replace spring
Free length ×
Outside diameter
Installed
length
Installed
load
Free length
Installed
load
23.3 × 12.5 23
3.92 N
{0.4 kg}
—
3.14 N
{0.32 kg}
22 Check valve spring 21.9 × 5 15.8
1.96 N
{0.2 kg}
—
1.57 N
{0.16 kg}
23 Retainer spring 9.1 × 4.2 7.4
0.98 N
{0.10 kg}
—
0.78 N
{0.08 kg}
24 Spool return spring 19.26 × 7.5 14
15.7 N
{1.6 kg}
—
12.6 N
{1.28 kg}
25 Check valve spring 21.9 × 5 15.8
1.96 N
{0.2 kg}
—
1.57 N
{0.16 kg}
26 Valve return spring 58.9 × 13 53
83.4 N
{8.5 kg}
—
66.7 N
{6.8 kg}
27 Spool return spring 49.8 × 18.8 33
98.1 N
{10 kg}
—
78.5 N
{8 kg}
28 Check valve spring 16.4 × 8.9 11.5
13.7 N
{1.4 kg}
—
11.0 N
{1.12 kg}