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
PW160-7H VEAM390100
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 SER-
VICE
(
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
•
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