Komatsu PC88MR-10 Shop Manual page 1286

60 Maintenance standard
Control valve
No. Item
Check valve spring
1
Spool return spring
2
60-34
Standard dimension
Free
Installed
height x
height
outside
diameter
21.9 x 5 15.8
19.3 x 7.5 13.5
Criteria
Repair limit
Load at
Free
installed
height
height
2 N
{0.2 kg}
17.2 N
{1.75 kg}
Unit: mm
Remedy
Load at
installed
Replace
height
spring if
damaged or
1.84 N
deformed
{0.19 kg}
16.1 N
{1.65 kg}
PC88MR-10