Komatsu PC500LC-10R Shop Manual page 649

60 MAINTENANCE STANDARD
No. Item
Variable back pressure valve
1
return spring
Check valve spring of hy-
2
draulic drift prevention valve
3 Check valve spring
Check valve spring for re-
4
generation circuit
PC500LC-10R
Judgment criteria
Standard dimensions
Free length
Installed
x outside di-
height
ameter
117.84 x
52
31.8
71.1 x 19.3 31
33.8 x 6 29
31.5 x 10.3 19.5
MAINTENANCE STANDARD OF CONTROL VALVE
Repair limit
Load at in-
Free
stalled
length
height
31.4 N
-
{3.2 kg}
35.3 N
-
{3.6 kg}
13.7 N
-
{1.4 kg}
6.2 N
-
{0.63 kg}
Unit: mm
Remedy
Load at in-
stalled
height
25.1 N
Replace the
{2.56 kg}
spring if dam-
aged or de-
28.2 N
formed
{2.88 kg}
11 N
{1.12 kg}
4.71 N
{0.48 kg}
60-45