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OUTLINE OF MAINTENANCE
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).
STORE DEF
•
Completely seal up its container for storage. Only open containers in a well-ventilated area.
•
When storing DEF, avoid direct sunlight. Always use the original container. Make sure that transfer equip-
ment and tank must meet DEF compatible material specification. If DEF is stored in an iron or aluminum
container, toxic gas may develop and a chemical reaction may corrode the container.
•
The relationship between the upper limit of storage temperature and the storage period of DEF is shown in
the table.
Temperature of storage area
Max.10 °C
Max.25 °C
Max.30 °C
Max.35 °C
*: Do not store DEF in the temperature of 35 °C or above.
Handling DEF in cold weather
•
DEF freezes at -11°C.
DEF may freeze and expand to break the devices and parts in the tank. The parts inside the tank may be
affected. Add DEF to the specified amount for cold weather (below the level of when DEF may freeze).
•
In cold weather, keep DEF or the machine installed with DEF indoors where the temperature is at -11°C or
higher to prevent DEF in the tank from freezing.
4-8
Storage period
Up to 36 months
Up to 18 months
Up to 12 months
Up to 6 months
MAINTENANCE
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