Komatsu PC88MR-10 Shop Manual page 1300

60 Maintenance standard
Boom swing PPC valve
No. Item
Centering spring
1
Metering spring
2
60-48
Standard dimension
Free height
Installed
x outside
height
diameter
42.36 x
32.5
15.5
22.73 x 8.1 22
Criteria
Repair limit
Load at
installed Free height
height
147 N
{15 kg}
16.7 N
{1.7 kg}
Unit: mm
Remedy
Load at
installed
Replace
height
spring if
118 N
damaged or
{12.0 kg} deformed
13.3 N
{1.36 kg}
PC88MR-10