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MAINTENANCE
•
If the fuel is used at temperatures higher than the specified temperature, the viscosity will drop, and it
may result in troubles such as a drop of output.
•
Before starting the engine, or after 10 minutes of adding fuel, drain the sediment and water from the fuel
tank.
•
If the engine runs out of fuel, or if the filters are replaced, it is necessary to bleed the air from the circuit.
•
If there is any foreign material in the fuel tank, wash the tank and fuel system.
NOTICE
Always use ultra-low-sulfur diesel fuel.
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. Use the fuel which is filled into the storage tank or the fuel tank of the
machine as soon as possible.
COOLANT AND WATER FOR DILUTION
•
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) as coolant. If you use another cool-
ant, it may cause serious problems, such as corrosion of the engine and aluminum parts of the cooling sys-
tem.
•
When using antifreeze, always observe the precautions given in Operation and Maintenance Manual.
•
Non-Amine Engine Coolant (AF-NAC) is already diluted with distilled water, so it is not flammable.
•
The coolant density needs to be changed in accordance with the ambient temperature.
For further information on the concentration of the coolant, see "METHOD FOR CLEANING INSIDE OF
COOLING SYSTEM".
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 it with city water.
•
If the engine overheats, wait for the engine to cool down 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
•
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.
•
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 anything other than DEF into the 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.
•
DEF is non-flammable; however, in the case of a fire it may generate an ammonia gas. Follow the instruc-
tions and precautions indicated in SAFETY INFORMATION "ACTIONS TO BE TAKEN IN THE EVENT OF
FIRE".
WENAM00130
OUTLINE OF MAINTENANCE
4-5
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