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MAINTENANCE
OUTLINE OF SERVICE
CARRYING OUT 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.
We strongly recommend you to use this service. The oil analysis is carried out at actual cost, so the cost is low, and
the results of the analysis are reported together with recommendations which will reduce repair costs and machine
downtime.
KOWA ANALYSIS ITEMS
Measurement of density of metal wear particles
This uses an ICP (Inductively Coupled Plasma) analyzer to
measure the density of iron, copper, and other metal wear
particles in the oil.
Measurement of quantity of particles
This uses a particle quantifier index measurement machine to
measure the quantity of iron particles of 5µ or more, enabling
early detection of failures.
Others
Measurements are made of items such as the ratio of water in the oil, density of the antifreeze coolant, ratio of
fuel in the oil, and dynamic viscosity, enabling a highly precise diagnosis of the machine's health.
OIL SAMPLING
Sampling interval
250 hours: Engine
500 hours: Other components
Precautions when sampling
Make sure that the oil is well mixed before sampling.
Perform sampling at regular fixed intervals.
Do not perform sampling on rainy or windy days when water or dust can get into the oil.
For further details of KOWA, please contact your Komatsu distributor.
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