Komatsu ecot3 PC300LC-8 Shop Manual page 133

10 Structure, function and maintenance standard
1. Safety-suction valve (Arm out)
2. Suction valve (R.H. travel reverse)
3. Suction valve (Boom raise)
4. Suction valve (L.H. travel reverse)
5. Safety-suction valve (Service 1)
6. Safety-suction valve (Service 2)
7. 2-stage safety-suction valve (Service 1)
8. Safety-suction valve (Arm Hi in)
9. Safety-suction valve (Bucket curl)
10. Suction valve (L.H. travel forward)
11. 2-stage safety-suction valve (Boom lower)
12. Suction valve (R.H. travel forward)
13. Safety-suction valve (Arm in)
14. LS shuttle valve (Arm)
15. LS shuttle valve (R.H. travel)
16. LS select valve
17. LS shuttle valve (Boom)
18. LS shuttle valve (L.H. travel)
19. LS shuttle valve (Bucket)
20. LS shuttle valve (Service 1)
21. LS shuttle valve (Service 2)
22. LS check valve
23. Pressure relief plug
No. Check item
24
Suction valve spring
25
Check valve spring
PC300, 350-8
Standard size
Free length x Installed
Outside diameter length
46.8 x 7.5 40.6
11.5 x 4.6 8.5
Criteria
Repair limit
Installed
Free length
load
5.5 N
—
{0.56 kg}
1.5 N
—
{0.15 kg}
SEN01994-01
Unit: mm
Remedy
Installed
load
If damaged or
deformed, replace
4.4 N
spring.
{0.45 kg}
1.2 N
{0.12 kg}
7