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OUTLINE OF MAINTENANCE
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If there is any foreign material in the fuel tank, wash the tank and fuel system.
NOTICE
Always use ultra-low-sulfur diesel fuel. (≤10 ppm)
The ASTM diesel fuel recommended by Komatsu may contain 5 % or less of biofuel. The EN diesel fuel
may contain 7 % or less of it. Do not use any additive agent which includes metallic constituent.
COOLANT AND WATER FOR DILUTION
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The coolant has the important function of preventing corrosion as well as preventing freezing.
Even in the areas where freezing is not an issue, the use of coolant is essential.
Komatsu machines are supplied with Non-Amine Engine Coolant (AF-NAC). Non-Amine Engine Coolant
(AF-NAC) has excellent anti-corrosion, antifreeze and cooling properties and can be used continuously for
2 years or 4000 hours.
Komatsu recommends the use of Non-Amine Engine Coolant (AF-NAC). If you use another coolant, it may
cause serious problems, such as corrosion of the engine and aluminum parts of the cooling system.
•
When using antifreeze, always observe the precautions given in Operation and Maintenance Manual.
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Non-Amine Engine Coolant (AF-NAC) is already diluted with distilled water, so it is not flammable.
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The coolant density needs to be changed according to the ambient temperature.
Even in areas where it is not considered necessary to prevent freezing, always use Non-Amine Engine
Coolant (AF-NAC) with a density of over 30 % in order to prevent corrosion of the cooling system.
Non-Amine Engine Coolant (AF-NAC) is diluted with distilled water that does not contain any ions or water-
hardening substances. Never dilute with water.
•
If the engine overheats, wait for the engine to cool before adding coolant.
•
If the coolant level is low, it will cause overheating, and will also cause problems with corrosion due to air
entering the coolant.
DEF
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If DEF gets on your skin, it may cause inflammation. Immediately take the contaminated clothes or shoes
off and wash it off with water. In addition, use a soap to wash it off thoroughly. If your skin becomes irritated
or begins to hurt, immediately consult a doctor for treatment.
•
Do not induce vomiting if swallowed. If swallowed, thoroughly rinse mouth with water and consult a doctor
for treatment.
•
Avoid contact with the eyes. If there is contact, flush with clean water for several minutes and consult a doc-
tor for treatment.
•
Wear protective eyeglasses when exposed to DEF to protect from solution splashing in your eyes. Wear
rubber gloves when you perform work handling DEF to avoid skin contact.
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When opening the cap of DEF tank of the machine, the ammonia vapor may escape. Keep your face away
from the filler port.
•
Do not put fluid other than DEF into DEF tank. If diesel fuel or gasoline is added into the tank, it can cause
a fire. Some fluids or agents added can create and emit a toxic gas.
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DEF is non-flammable; however, in the case of a fire it may generate an ammonia gas.
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If DEF is spilled, immediately wash and clean the area with water. If spilled DEF is left unattended and the
area is not washed and cleaned, it can cause corrosion to the contaminated area and emit toxic gas.
•
When disposing of DEF, treat it as an industrial waste. The container for DEF is an industrial waste as well.
It should be treated in the same way.
•
Never use an iron or aluminum container when disposing DEF, because toxic gas may develop and a
chemical reaction may corrode the container. Use a container made of resin (PP, PE) or stainless steel
when handling the fluid waste of DEF.
NOTICE
If you add any additional additive agents or water to DEF, the devices in the Urea SCR system may be
defective, and conformance to the exhaust gas regulations will be lost.
4-6
MAINTENANCE
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