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MAINTENANCE PROCEDURE
4.
Set lock lever to LOCK position (L) and lock the work
equipment control levers and the attachment control pedal.
METHOD FOR CHECKING ALTERNATOR AND STARTING MOTOR
The brushes may be worn or the bearing may have run out of grease, contact your Komatsu distributor for in-
spection and repairs.
If the engine is started frequently, have this inspection performed every 1000 hours.
METHOD FOR CHECKING AND ADJUSTING ENGINE VALVE CLEARANCE
Special tools are necessary for inspection and maintenance. Ask your Komatsu distributor to perform this work.
METHOD FOR REPLACING KCCV FILTER ELEMENT
After the engine has been operated, all of parts are still very hot. Do not replace the filter element imme-
diately. Wait until all of parts cool down before starting the work.
NOTICE
•
If the engine is operated without the filter element, the turbocharger and aftercooler become dirty
and their performance will lower and that can cause engine problems such as overrun caused by
suction of oil. Therefore, do not start the engine without the filter element.
•
The filter element cannot be cleaned. If the filter element is cleaned or refurbished, the filter per-
formance lowers. As a result, the turbocharger and aftercooler become dirty and the crankcase
pressure increases. Never reuse the filter element since it can cause an engine failure.
•
After the filter element is replaced, if KCCV is not assembled correctly, oil or blowby gas may leak.
Replace the filter element in the correct procedure.
Prepare a container to catch oil.
The KCCV ventilator is located in the positions shown in the
figure.
4-68
WARNING
k
WENAM00111
MAINTENANCE
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