Komatsu ecot3 PC300LC-8 Shop Manual page 225

10 Structure, function and maintenance standard
1. Output shaft
2. Motor case
3. Rocker cam
4. Piston
5. Cylinder block
6. Valve plate
7. End cover
8. Slow return valve
9. Brake spring
10. Brake piston
11. Plate
12. Disc
13. Regulator piston
14. Check valve
15. Counterbalance valve
16. Safety valve
17. Ball
18. Regulator valve
19. Spring
No. Check item
20
Spool return spring
21
Check valve spring
Regulator piston
22
spring
Regulator valve
23
spring
PC300, 350-8
Standard size
Free length x Installation
Outside diameter length
58.43 x 30.0 42.0
33.0 x 13.8 23.0
61.1 x 23.2 43.9
29.6 x 9.0 26.0
Criteria
Repair limit
Installed
Free length
load
427 N
—
{43.5 kg}
1.27 N
—
{0.13 kg}
221 N
—
{22.5 kg}
98.1 N
—
{10.0 kg}
SEN01995-01
Unit: mm
Remedy
Installed
load
341 N
{34.8 kg}
If damaged or
deformed, replace
0.98 N
spring.
{0.10 kg}
177 N
{18.0 kg}
78.5 N
{8.0 kg}
33