MAINTENANCE OUTLINES OF SERVICE
4-5
COOLANT 4
q River water contains large amount of calcium and other impurities, so if it is used, scale will stick to the engine
and radiator, and this will cause defective heat exchange and overheating.
Do not use water that is not suitable for drinking.
q When using antifreeze, always observe the precautions given in the Operation and Maintenance Manual.
q This antifreeze is also effective in preventing corrosion on the parts of the engine cooling system. It may be
continuously used for two years or 4000 hours of operation, therefore it may be used throughout the year.
q Antifreeze is flammable, so be extremely careful not to expose it to flame or fire.
q The proportion of antifreeze to water differs according to the ambient temperature.
For details of the mixing proportions, see “CLEAN INSIDE OF COOLING SYSTEM (4-23)“.
q If the engine overheats, wait for the engine to cool before adding coolant.
q If the coolant level is low, it will cause overheating and will also cause problems with corrosion from the air in
the coolant.
GREASE 4
q Grease is used to prevent twisting and noise at the joints.
q The nipples not included in the maintenance section are nipples for overhaul, so they do not need grease.
If any part becomes stiff after being used for long time, add grease.
q 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.
CARRYING OUT KOWA (Komatsu Oil Wear Analysis) 4
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 abnormalities.
Periodic use of KOWA makes the following possible:
q It enables abnormalities to be detected early, leading to reduction of repair costs and machine downtime.
q It enables repair schedules to be planned, leading to improved machine availability.
KOWA analysis items
q Analysis of metal wear particles
This uses an ICP (Inductively Coupled Plasma) analyzer to
measure the density of metal wear particles in the oil.
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