Komatsu PC58UU-3 User Manual

TROUBLESHOOTING H-3
PC58UU-3
20-513
1
b) Work equipment (excluding blade), travel, and swing systems do not move
c) Work equipment (excluding blade) and travel systems do not move
d) Swing and blade systems do not move
Cause Remedy
1
When engine is cranked, does oil
flow out of control pump?
No
Defective control pump
Repair or
replace
Yes
1
• 2.94
+ 0.5
- 0.1
MPa
{30
+ 5
- 1
kg/cm²}
• Run engine at full throttle
Is output pressure of PPC main pres-
sure lock solenoid valve normal?
No
Defective PPC main pres-
sure lock solenoid valve or
defective electric system
Repair or
replace
Yes
Go to related troubleshoot-
ing in H-10 ~ 13, 24, and 29
—
Cause Remedy
1
When engine is cranked, does oil
flow out of main pump?
No
Defective main pump
Repair or
replace
Yes
2
• 2.94
+ 0.5
- 0.1
MPa
{30
+ 5
- 1
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
When engine is cranked, does oil
flow out of gear pump?
No
Defective gear pump
Repair or
replace
Yes
1
When gear pump circuit relief valve
is adjusted or replaced, is travel
repaired?
No
Go to related troubleshoot-
ing in H-29 and 37
—
Yes
Defective gear pump circuit
relief valve
Adjust or
replace

Komatsu PC58UU-3 Specifications

General

Brand	Komatsu
Model	PC58UU-3
Category	Construction Equipment
Language	English