Komatsu PC30MR-5 Operation & Maintenance Manual page 263

MAINTENANCE
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.
STORE OIL AND FUEL
• Keep oil and fuel indoors to prevent any water, dirt, or other impurities from getting in.
• When keeping drum cans for a long period, lay the drums so that the filler ports of the drums are located in
the lower part of the side to prevent moisture from being sucked in. If drums have to be stored outside, cov-
er them with a waterproof sheet or take other measures to protect them.
• To prevent any change in quality during long-term storage, be sure to use in the order of first in - first out
(use the oldest oil or fuel first).
FILTER
• Filters are extremely important safety parts. They prevent impurities in the oil, fuel, and air circuits from en-
tering important equipment and causing problems. Replace all filters periodically. For details, see Operation
and Maintenance Manual.
However, when working in severe conditions, replace the filters at shorter intervals according to the oil and
fuel (sulfur content) being used.
• Never try to clean and use again the filters (cartridge type). Always replace them with new filters.
• When replacing oil filters, check if any metal particles are attached to the old filters.
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OUTLINE OF MAINTENANCE
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