Komatsu PC58UU-3 User Manual

TROUBLESHOOTING H-3
20-514
PC58UU-3
1
e) Travel and blade systems do not move
f) Work equipment (excluding blade) system does not move
Cause Remedy
1
• 26.0
+1
- 0.5
MPa
{265
+10
-5
kg/cm²}
• Run engine at full throttle
Is travel relief pressure normal?
No
Repair or
replace
Yes
Go to related troubleshoot-
ing in H-24 and 37
2
• 21.6
+1.5
- 0.5
MPa
{220
+15
- 5
kg/cm²}
• Run engine at full throttle
When main relief valve is adjusted or
replaced, is travel repaired?
No
Yes
Defective main relief valve
Repair or
replace
3
Does unload valve move smoothly?
No
Defective unload valve
Repair or
replace
Yes
Defective main relief valve
Repair or
replace
Cause Remedy
1
• 2.45 MPa {25 kg/cm²}
• Run engine at full throttle
Is all PPC pressure normal (at PPC
pressure inlet of connection)?
No
Yes
Go to related troubleshoot-
ing in H-10 ~ 137
—
1
Is PPC pressure normal at only 1
part?
No
Go to related troubleshoot-
ing in H-10 ~ 13
—
Yes
Defective PPC circuit check
valve at part where pres-
sure is normal
Replace

Komatsu PC58UU-3 Specifications

General

Brand	Komatsu
Model	PC58UU-3
Category	Construction Equipment
Language	English