F) Speed Or Power Of Work Equipment (Excluding Blade) Is Low; G) Speed Or Power Of Travel And Swing Systems Is Low - Komatsu PC58UU-3 Shop Manual

TROUBLESHOOTING

f) Speed or power of work equipment (excluding blade) is low

• 2.45 MPa {25 kg/cm²}
• Run engine at full throttle
• 1.57 ± 0.1 MPa
{16 ± 1 kg/cm²}
• Run engine at full throttle

g) Speed or power of travel and swing systems is low

Carry out troubleshooting in b) above.
# If the PPC main pressure is lower than in b) above, this trouble can occur.
PC58UU-3
Is all PPC pressure normal (at PPC
pressure inlet of control valve)?
Yes
Is LS differential pressure normal?
Yes
Is PPC pressure normal at only 1 part
(in single operation)?
Yes
Cause
1
No
2
No
Improper adjustment of
pump LS valve
Go to related troubleshoot-
ing in H-6 ~ 9
3
No
Go to related troubleshoot-
ing in H-6 ~ 9
Defective PPC circuit check
valve at part where PPC
pressure is normal
H-1
Remedy
Adjust
—
—
Replace
20-509
1