Komatsu ecot3 PC300LC-8 Shop Manual page 203

10 Structure, function and maintenance standard
1. Plate
2. Body
3. Piston
4. Collar
5. Centering spring
6. Metering spring
7. Valve
8. Dumper
9. Steering signal spool
10. Steering signal spool spring
No. Check item
11
Centering spring
12
Metering spring
13
Steering signal spring
PC300, 350-8
Standard size
Free length x Installed
Outside diameter length
47.6 x 15.5 32.5
26.5 x 8.15 24.9
12.8 x 7.3 8.5
Criteria
Repair limit
Installed
Free length
load
108 N
—
{11.0 kg}
16.7 N
—
{1.7 kg}
8.8 N
—
{0.9 kg}
SEN01995-01
Unit: mm
Remedy
Installed
load
86.3 N If damaged or
{8.8 kg} deformed, replace
spring.
13.7 N
{1.4 kg}
7.1 N
{0.72 kg}
11