Komatsu PC88MR-10 Shop Manual page 1294

60 Maintenance standard
Work equipment and swing PPC valve
No. Item
Centering spring
1
(for P3, P4 port)
Centering spring
2
(for P1, P2 port)
Metering spring
3
60-42
Standard dimension
Free
Installed
height x
height
outside
diameter
38.7 x 15.5 34.0
42.5 x 15.5 34.0
26.5 x 8.15 24.9
Criteria
Repair limit
Load at
Free
installed
height
height
9.81 N
{1 kg}
17.7 N
{1.8 kg}
16.7 N
{1.7 kg}
Unit: mm
Remedy
Load at
installed
height
Replace
7.85 N
spring if
damaged or
{0.8 kg}
deformed
14.1 N
{1.44 kg}
13.3 N
{1.36 kg}
PC88MR-10