Komatsu PC58UU-3 User Manual

PC58UU-3 20-607
TROUBLESHOOTING
M-6 Engine preheating pilot lamp does not light up while engine is
preheated
a If the lamp does not light up for 3 seconds after the starting switch is turned to the ON position, carry out M-2.
M-6 Related electrical circuit diagram
M-7 Engine oil pressure caution lamp lights up while engine is running
(Engine oil pressure is normal)
M-7 Related electrical circuit diagram
Cause Remedy
• Turn the starting switch to
HEAT position.
• 10 – 15 V.
1
Disconnection in wiring har-
ness between F27 (female)
(13) – starting switch R1 or
defective starting switch
Defective monitor panel
Is voltage between F27 (13) and (3), (4)
normal?
NO
Repair or
replace
YES
Replace
Cause Remedy
• Start engine.
• Disconnect T-M5.
1
Does engine oil pressure caution lamp
go off?
NO
YES
Defective engine oil pres-
sure switch
Replace
2
• Min. 1.0 Mz
• Turn starting switch OFF.
• Disconnect F27 and T-M5.
Is F27 (female) (9) insulated from chas-
sis ground?
NO
Contact with chassis ground
in wiring harness between
F27 (female) (9) – T-M5
Repair or
replace wiring
harness
YES
Defective monitor panel Replace
M-6, M-7
(6)

Komatsu PC58UU-3 Specifications

General

Brand	Komatsu
Model	PC58UU-3
Category	Construction Equipment
Language	English