Komatsu PC500LC-10R Shop Manual page 653

60 MAINTENANCE STANDARD
No. Item
1 Boom Hi check valve spring
2 Arm quick return valve spring
PC500LC-10R
MAINTENANCE STANDARD OF CONTROL VALVE
Judgment criteria
Standard dimensions
Free length
Installed
x outside
height
diameter
71.1 x 19.3 31
33 x 12 26
Repair limit
Load at in-
Free
stalled
length
height
35.3 N
-
{3.6 kg}
35.3 N
-
{3.6 kg}
Unit: mm
Remedy
Load at in-
stalled
Replace the
height
spring if dam-
aged or de-
29.0 N
formed
{3.0 kg}
28.2 N
{2.9 kg}
60-49