Komatsu PC290LC-11 Operation & Maintenance Manual page 349

MAINTENANCE
• When opening the cap of DEF tank of the machine, the ammonia vapor may escape. Keep your face away
from the filler port.
• Do not put fluid other than DEF into DEF tank. If diesel fuel or gasoline is added into the tank, it can cause
a fire. Some fluids or agents added can create and emit a toxic gas.
• DEF is non-flammable; however, in the case of a fire it may generate an ammonia gas.
• If DEF is spilled, immediately wash and clean the area with water. If spilled DEF is left unattended and the
area is not washed and cleaned, it can cause corrosion to the contaminated area and emit toxic gas.
• When disposing of DEF, treat it as an industrial waste. The container for DEF is an industrial waste as well.
It should be treated in the same way.
• Never use an iron or aluminum container when disposing DEF, because toxic gas may develop and a
chemical reaction may corrode the container. Use a container made of resin (PP, PE) or stainless steel
when handling the fluid waste of DEF.
NOTICE
If you add any additional additive agents or water to DEF, the devices in the Urea SCR system may be
defective, and conformance to the exhaust gas regulations will be lost.
GREASE
• Grease is used to prevent seizure and noises at the joints.
• This construction equipment is used under heavy-duty conditions. Komatsu recommends using the recom-
mended grease and follow the replacement intervals and recommended ambient temperatures given in this
Operation and Maintenance Manual.
• Grease fittings not included in the periodic maintenance section are the grease fittings for overhaul, so they
do not need grease.
If any part becomes stiff after being used for long time, add grease.
• Always wipe off all of the old grease that is pushed out when greasing.
Be particularly careful to wipe off the old grease in places where sand or dirt sticking in the grease would
cause wear of the rotating parts.
PERFORM KOWA (Komatsu Oil Wear Analysis)
KOWA is a maintenance service that makes it possible to prevent machine failures and downtime. With KOWA,
the oil is periodically sampled and analyzed. This enables early detection of wear of the machine drive parts and
other problems.
Thanks to long term experience and ample data accumulated, we can grasp condition of your machine accu-
rately and provide proper recommendation.
We strongly recommend you to use this service. The oil analysis is performed at actual cost, so the cost is low,
and results of the analysis and recommendations are reported promptly.
KOWA analysis items
Measurement of metallic powder concentration
An ICP (Inductively Coupled Plasma) analyzer is used for
measuring the concentration of iron, copper, and other metal
powder in the oil.
OUTLINE OF MAINTENANCE
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