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OPERATION
ENGINE
( ) Always contact your Komatsu distributor when dealing with
●
these items.
In cases of abnormalities or causes which are not listed
●
below, please contact your Komatsu distributor for repairs.
Problem
Engine oil pressure monitor lights
up
Steam spurts out from top of radia-
tor (pressure valve)
Radiator water level monitor lights
up
Engine does not start when starting
motor is turned
Exhaust gas is white or blue
Main causes
Engine oil pan oil level is low
●
(sucking in air)
Clogged oil filter cartridge
●
Defective tightening of oil pipe,
●
pipe joint, oil leakage from dam-
aged point
●
Defective engine oil pressure
sensor
Defective monitor
●
Cooling water level low, leakage
●
of water
Loose fan belt
●
Dirt or scale accumulated in
●
cooling system
Clogged radiator fins or dam-
●
aged fins
Defective thermostat
●
Loose radiator filler cap (high-
●
altitude operations)
Defective water level sensor
●
Defective monitor
●
Lack of fuel
●
Air in fuel system
●
Defective fuel injection pump or
●
defective nozzle
Starting motor cranks engine
●
sluggishly
Preheating monitor does not
●
light up
Defective compression
●
Defective valve clearance
●
Too much oil in oil pan
●
Improper fuel
●
TROUBLESHOOTING
Remedy
Add oil to specified level, see
●
CHECK BEFORE STARTING
Replace cartridge, see EVERY
●
500 HOURS SERVICE
(Check, repair)
●
●
(Replace sensor)
(
Replace)
●
•
Check, add water, repair, see
●
CHECK BEFORE STARTING
Check fan belt tension, adjust,
●
replace
Change coolant, flush inside of
●
cooling system, see WHEN
REQUIRED
Clean or repair, see EVERY 500
●
HOURS SERVICE
(Replace thermostat)
●
Tighten cap or replace packing
●
(Replace sensor)
●
(Replace sensor)
●
Add fuel, see CHECK BEFORE
●
STARTING
Repair place where air is sucked
●
in, see EVERY 500 HOURS
SERVICE
(Replace pump or nozzle)
●
See ELECTRICAL SYSTEM
●
See ELECTRICAL SYSTEM
●
(Adjust valve clearance)
●
Set oil to specified level, see
●
CHECK BEFORE STARTING
Change to specified fuel
●
219
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