Komatsu D61EX-24 Operation & Maintenance Manual page 321

OUTLINE OF MAINTENANCE
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.
Measurement of quantity of iron particles
A PQI (Particle Quantifier Index) measuring instrument is used
for measuring the quantity of iron particles of 5 μm or more, en-
abling early detection of failures.
Others
Measurements are made of items such as the ratio of water, coolant, and fuel in the oil, and dynamic viscosity, if
necessary, to enable a highly precise diagnosis of the machine and the components' condition.
Oil sampling interval
500 hours
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, contact your Komatsu distributor.
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MAINTENANCE