Komatsu PC500LC-10R Shop Manual page 661

60 MAINTENANCE STANDARD
No. Item
1 Centering spring
2 Metering spring
Tightening torque of the
3
bolt
PC500LC-10R
MAINTENANCE STANDARD OF 1ST-LINE ATTACHMENT PPC VALVE
Judgment criteria
Standard dimensions
Free height
Installed
x outside
height
diameter
33.9 x 15.3 28.4
22.7 x 8.10 22.0
11.76 to 14.7 Nm {1.2 to 1.5 kgm}
Repair limit
Load at in-
stalled Free height
height
125 N
-
{12.7 kg}
16.7 N
-
{1.70 kg}
(WITH EPC VALVE)
Unit: mm
Remedy
Load at in-
stalled
Replace the
height
spring if dam-
aged or de-
100 N
formed
{10.2 kg}
13.3 N
{1.36 kg}
Re-tighten
60-57