Komatsu PC30MR-5 Operation & Maintenance Manual page 254

TROUBLES AND ACTIONS
Problem
Pinion of starting motor repeats en-
gaging and disengaging (rattles).
Starting motor turns engine sluggish-
ly.
Starting motor disengages before en-
gine starts.
Preheating pilot lamp does not light
up.
Oil pressure caution lamp does not
light up when engine is stopped
(starting switch is in ON position).
PHENOMENA AND ACTIONS FOR CHASSIS
• In cases of problems or causes which are not listed below, ask your Komatsu distributor for repairs.
Problem
Speed of travel, swing, boom, arm,
bucket is slow
Pump generates unusual noise.
Excessive rise in hydraulic oil temper-
ature
Track comes off.
Abnormal wear of sprocket
PHENOMENA AND ACTIONS FOR ENGINE RELATED PARTS
• Contact your Komatsu distributor for the remedies indicated with (*) in the remedy column.
• Ask your Komatsu distributor for repairs for problems or causes which are not listed below.
Problem
Engine oil pressure caution lamp is
lit.
(Buzzer sounds at the same time.)
3-188
Main causes
Insufficient battery charge
Insufficient battery charge
Defective starting motor
Defective wiring
Insufficient battery charge
Defective wiring
Defective caution lamp
Defective oil pressure switch
Main causes
Lack of hydraulic oil
Clogged element in hydraulic tank
strainer
Lack of hydraulic oil
Loose fan belt
Clogged radiator fins and oil cooler
fins
Track too loose
Track too loose
Main causes
Insufficient oil in engine oil pan (suck-
ing in air)
Clogged oil filter cartridge
Oil leakage due to defective tighten-
ing or breakage of oil pipe or pipe
joint.
Engine oil pressure switch error
WENAM00150
Remedy
Charge the battery.
Charge the battery.
Replace. (*)
Check, repair. (*)
Charge the battery.
Check, repair. (*)
Replace. (*)
Replace. (*)
Remedy
Set oil to specified level. See
CHECKS BEFORE STARTING.
Clean. See EVERY 2000 HOURS
MAINTENANCE.
Set oil to specified level. See
CHECKS BEFORE STARTING.
Adjust fan belt tension. See EVERY
500 HOURS MAINTENANCE.
Clean or repair. See EVERY 500
HOURS MAINTENANCE.
Adjust track tension. See WHEN RE-
QUIRED.
Adjust track tension. See WHEN RE-
QUIRED.
Remedy
Make the oil filled to the specified lev-
el by referring to CHECKS BEFORE
STARTING.
Replace the cartridge by referring to
EVERY 500 HOURS MAINTE-
NANCE.
Check, repair. (*)
Replace switch. (*)
OPERATION