Komatsu PC15MRX-1 Operation And Maintenance Manual page 146

LUBRICANTS, COOLANT AND FILTERS
COOLING SYSTEM COOLANT
River water contains large amounts 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.
When using anti-freeze, always observe the precautions given in the Operation and Maintenance Manual.
Komatsu machines are supplied with Komatsu specified anti-freeze in the coolant.
This anti-freeze is effective in preventing corrosion of the cooling system.
The anti-freeze can be used continuously for 2 years or 4000 hours. Therefore, it can be used as it is even in
hot areas.
Anti-freeze is flammable, so be extremely careful not to expose it to flame or fire.
The ratio for the mixture of water and anti-freeze differs according to the ambient temperature.
For details of the ratio, see "CLEAN INSIDE OF COOLING SYSTEM (PAGE 4-23)".
If the engine overheats, wait for the engine to cool before adding coolant.
In addition to causing overheating, lack of cooling water also causes corrosion of the cooling circuit due to
entry of air.
CARRYING OUT KOWA (Komatsu Oil Wear Analysis)
KOWA is a maintenance service that makes it possible to prevent machine failures and down-time. 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:
It enables abnormalities to be detected early, leading to reduction of repair costs and machine downtime.
It enables repair schedules to be planned, leading to improved machine availability.
KOWA ANALYSIS ITEMS
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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MAINTENANCE