Komatsu Galeo PC138US-8 Shop Manual page 139

10 Structure, function and maintenance standard
1. Suction safety valve (Service)
2. Suction valve (Bucket)
3. Suction valve (Arm)
4. Suction valve (Boom)
5. Lift check valve
6. Suction valve (Right travel)
7. Suction valve (Left travel)
8. Suction valve (Blade)
9. Suction safety valve (Blade)
10. Suction valve (Left travel)
11. Suction valve (Right travel)
12. Main relief valve
13. Suction valve (Boom)
14. Suction valve (Arm)
No. Check item
28 Suction valve spring
29 Piston return spring
30 Suction valve spring
31 Spool return spring
32 Spool return spring
33 Spool return spring
34 Spool return spring
35 Spool return spring
36 Spool return spring
37 Spool return spring
38 Spool return spring
39 Spool return spring
PC138US, USLC-8
Standard size
Free length
Installed
× Outside
length
diameter
46.8 × 7.5 40.6
72.7 × 20.6 42.5
39.2 × 4.45 33.5
41.8 × 19 38.5
41.44 × 19.3 38.5
27.14 × 25.8 25.5
32.4 × 11 31.4
76.78 × 20.9 70
45.7 × 28 43
42.4 × 28 39
45.6 × 28 43
45.81 × 28 43
15. Suction valve (Bucket)
16. Suction safety valve (Service)
17. Suction safety valve
18. Spool (Service)
19. Spool (Bucket)
20. Spool (Arm)
21. Spool (Boom)
22. Spool (Right travel)
23. Spool (Left travel)
24. Spool (Blade)
25. Spool (Swing)
26. Unload valve
27. Unload valve
Criteria
Repair limit
Installed
Free length
load
5.49 N
—
{0.56 kg}
135 N
—
{13.8 kg}
5.1 N
—
{0.52 kg}
141 N
—
{14.4 kg}
137 N
—
{13.96 kg}
55.9 N
—
{5.7 kg}
60.2 N
—
{6.137 kg}
423 N
—
{43.1 kg}
221 N
—
{22.55 kg}
222 N
—
{22.6 kg}
230 N
—
{23.5 kg}
203 N
—
{20.7 kg}
SEN02549-02
Unit: mm
Remedy
Installed
load
4.41 N
{0.45 kg}
108 N
{11.0 kg}
4.12 N
{0.42 kg}
113 N
{11.5 kg}
110 N
If damaged or
{11.2 kg}
deformed,
44.7 N
replace spring
{4.56 kg}
48.2 N
{4.91 kg}
338 N
{34.5 kg}
177 N
{18.04 kg}
178 N
{18.1 kg}
184 N
{18.8 kg}
163 N
{16.6 kg}
5