COLD WEATHER OPERATION
COLD WEATHER OPERATION INFORMATION
If the ambient temperature becomes low, it becomes difficult to start the engine, and the coolant may freeze.
Follow the instructions described as follows.
FUEL AND LUBRICANTS
Change fuel and oil with ones of low viscosity for all components.
For the details of specified viscosity, see “RECOMMENDED FUEL, COOLANT, AND LUBRICANT (7-5)”.
COOLANT
WARNING
• Coolant is toxic. Be careful not to get it into your eyes or on your skin. If it should get into your eyes
or on your skin, wash it off with large amounts of fresh water and see a doctor immediately.
• When handling the cooling water containing coolant that has been drained during changing the
coolant or repair of radiator, contact your Komatsu distributor or request a qualified company to
perform the operation. Coolant is toxic, so never pour it into drainage ditches or drain it onto the
ground surface.
NOTICE
Komatsu recommends the use of Non-Amine Engine Coolant (AF-NAC) for the coolant.
Non-Amine Engine Coolant (AF-NAC) is already diluted with distilled water, so it is not flammable.
For details on the coolant change interval and the density of Non-Amine Engine Coolant (AF-NAC), see “METH-
OD FOR CLEANING INSIDE OF COOLING SYSTEM (4-20)”.
DEF
NOTICE
•
DEF freezes at –11 °C.
If DEF in DEF tank freezes, it may expand to break the devices 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).
For the specified amount of DEF, see “METHOD FOR CHECKING DEF LEVEL, ADDING DEF (3-152)”.
• If DEF or the machine equipped with DEF system cannot be stored at the outside temperature is
lower than –11 °C, DEF in the tank may freeze. Ask your Komatsu distributor for discharging of DEF,
and keep it in the condition free from freezing.
BATTERY
WARNING
• Battery generates flammable gas. Never bring any open flame near the battery.
• Battery electrolyte is dangerous object. If it gets in your eyes or on your skin, wash it off with a
large amount of water and consult a doctor.
• Battery electrolyte dissolves paint. If it gets on the bodywork, wash it off immediately with water.
• If the battery electrolyte is frozen, do not charge the battery or start the engine with a different pow-
er source. There is danger that the battery may explode.
• Battery electrolyte is toxic. Do not let it flow into drainage ditches or spray it on to the ground sur-
face.
When the ambient temperature drops, the capacity of the battery will also drop. Maintain the battery charging
rate as close as possible to 100%. Insulate it against cold temperature to ensure that the machine can be start-
ed easily in the next morning.
OPERATION COLD WEATHER OPERATION
3-251
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