Recommended Fuel, Coolant, And Lubricant - Komatsu D31EX -22 Operation & Maintenance Manual

MAINTENANCE

RECOMMENDED FUEL, COOLANT, AND LUBRICANT

Komatsu genuine oils are adjusted to maintain the reliability and durability of Komatsu construction equipment
and components.
In order to keep your machine in the best conditioner for long periods of time, it is essential to follow the
instructions in this Operation and Maintenance Manual.
Failure to follow these recommendations may result in shortened life or excess wear of the engine, power train,
cooling system, and/or other components.
Commercially available lubricant additives may be good for the machine, but they may also cause harm.
Komatsu does not recommend any commercially available lubricant additive.
Use the oil recommended according to the ambient temperature in the chart below.
Specified capacity means the total amount of oil including the oil in the tank and the piping. Refill capacity means
the amount of oil needed to refill the system during inspection and maintenance.
When starting the engine in temperatures below 0°C (32°F), be sure to use the recommended multi-grade oil,
even if the ambient temperature may become higher during the course of the day.
If the machine is operated at a temperature below -20°C (-4°F), a separate device is needed, so consult your
Komatsu distributor.
When the fuel sulfur content is less than 0.5%, change the engine oil according to the period inspection table
given in this Operation and Maintenance Manual.
If the fuel sulfur content is more than 0.5%, change the oil according to the following table.
Sulfur content (%)
Less than 0.5
0.5 - 1.0
1.0 and up
* If these fuels are used, there is danger that serious trouble may occur because of early deterioration of the engine
oil or early wear of the internal parts of the engine. If the local situation makes it necessary to use these fuels,
always remember the following.
1) Be sure to check Total Basic Number (TBN) of oil frequently by TBN handy checker etc., and change oil
based on the result.
2) Always be aware that oil change interval is extremely shorter than standard.
3) Be sure to carry out periodic engine inspection by distributor's expert since change interval of periodic
replacement parts and overhaul interval are also shorter.
Oil change interval
500 hours
250 hours
Not recommendable (*)
RECOMMENDED FUEL, COOLANT, AND LUBRICANT
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