OPERATION TROUBLES AND ACTIONS
3-249
Starting motor does not turn
•Defective starting motor
•Engine stop switch is ON
(•Check, replace, repair)
(•Cancel engine stop switch)
Fuel stops from time to time •Crushed fuel tank breather element (•Replace breather element)
Excessive oil consumption •Oil leakage
•Excessive oil in oil pan
•Worn piston, ring, cylinder liner
•Improper fuel
•Defective turbocharger
(•Check, repair)
•Add oil to specified level. See
CHECK BEFORE STARTING
(•Replace)
•Replace with specified fuel
(•Check, replace)
Exhaust gas is while or blue
Exhaust gas is black
•Clogged air cleaner element
•Worn piston, ring, cylinder liner
•Defective compression
•Defective turbocharger
•Defective injector
•Clean or replace. See WHEN
REQUIRED
(•Check, repair)
•See adjustment of clearance
above
(•Check, replace)
(•Check, replace, repair)
Engine hunts
•Air entering suction side of fuel line
•Clogged fuel strainer
•Drain water of fuel pre-filter
•Drain water of fuel filter
There is knocking
(combustion or mechanical)
•Poor quality fuel being used
•Overheating
•Replace with specified fuel
•Refer to “Radiator water level
monitor lights up“
as above
Error code is displayed on monitor
Please contact your Komatsu distributorAlarm buzzer sounds
Engine suddenly loses power
Combustion noise occasionally
make breathing sound
•Defective nozzle (•Replace nozzle)
Abnormal noise generated
(combustion or mechanical)
•Low-grade fuel being used
•Overheating
•Damage inside muffler
•Excessive valve clearance
•Change to specified fuel
•Refer to “Radiator water level
monitor lights up“ as above
•Replace muffler
(•Adjust clearance)
Problem Main causes Remedy
To Next Page