Komatsu PW130ES-6K Operation & Maintenance Manual page 162

OPERATION
In cases of abnormalities or causes which are not listed
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below, please contact your Komatsu distributor for repairs.
Problem
Engine oil pressure monitor lights
up
Steam is emitted from top part of
radiator (pressure valve)
Radiator water level monitor lights
up
Engine does not start when start-
ing motor is turned.
Exhaust gas is white or blue
Exhaust gas occasionally turns
black
Combustion noise occasionally
makes breathing sound
Abnormal noise generated (com-
bustion or mechanical).
Main causes
Engine oil pan oil level is low
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(sucking in air)
Clogged oil filter cartridge
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Defective tightening of oil pipe
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joint, oil leakage from damaged
part
Defective engine oil pressure
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sensor
Cooling water level low, water
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leakage
Loosen fan belt
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Dirt or scale accumulated in
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cooling system
Clogged radiator fin or dam-
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aged fin
Defective thermostat
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Loose radiator filler cap (high
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altitude operation)
Defective water level sensor
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Lack of fuel
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Air in fuel system
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Defective fuel injection pump or
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nozzle
Starting motor cranks engine
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sluggishly
Preheating monitor does not
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light up
Defective compression
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Defective valve clearance
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Too much oil in oil pan
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Improper fuel
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Clogged air cleaner element
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Defective nozzle
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Defective compression
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Defective turbocharger
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Defective nozzle
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Low grade fuel being used
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Overheating
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Damage inside muffler
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Excessive valve clearance
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TROUBLESHOOTING
Remedy
Add oil to specified level, see
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CHECK BEFORE STARTING
Replace cartridge, see EVERY
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250 HOURS SERVICE
(Check, repair)
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(Replace sensor)
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Add cooling water, repair, see
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CHECK BEFORE STARTING
Adjust fan belt tension, see
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EVERY 250 HOURS SERVICE
Change cooling water, clean
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inside of cooling system, see
WHEN REQUIRED
Clean or repair, see EVERY 500
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HOURS SERVICE
(Replace thermostat)
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Tighten cap or replace packing
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(Replace sensor)
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Add fuel, see CHECK BEFORE
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STARTING
Repair place where air is sucked
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in, see EVERY 500 HOURS
SERVICE
(Replace pump or nozzle)
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See ELECTRICAL SYSTEM
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(Adjust valve clearance)
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Add oil to specified level, see
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CHECK BEFORE STARTING
Change to specified fuel
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Clean or replace, see WHEN
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REOUIRED
(Replace nozzle)
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(See defective compression
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above)
Clean or replace turbo-charger
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(Replace nozzle)
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Change to specified fuel
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Refer to "Radiator water level
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monitor lights up" as above
(Replace muffler)
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(Adjust valve clearance)
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