Komatsu Galeo PC138US-8 Shop Manual page 229

10 Structure, function and maintenance standard
CY : To work equipment cylinder
PCY: For pressure pickup port and equalizer circuit
PI : From PPC valve
T : To tank
V : From control valve
1. Pilot spool
2. Safety valve
3. Check valve
No. Check item
4 Check valve spring
5 Spool return spring
6 Spool return spring
PC138US, USLC-8
Standard size
Free length
Installation
× Outside
length
diameter
20.8 × 12.2 13.5
41.1 × 9.6 35.0
41.9 × 25.8 41.0
Criteria
Repair limit
Installation
Free length
load
12.7 N
—
{1.3 kg}
58.8 N
—
{6.0 kg}
78.5 N
—
{8.0 kg}
SEN02550-01
Unit: mm
Remedy
Installation
load
If damaged or
10.2 N
deformed,
{1.04 kg}
replace spring.
47.1 N
{4.8 kg}
62.8 N
{6.4 kg}
47