14. COLD WEATHER OPERATION
14.1 PRECAUTIONS FOR LOW TEMPERATURE
If the temperature becomes low, it becomes difficult to start the
engine, and the coolant may freeze, so do as follows.
14.1.1 FUEL AND LUBRICANTS
Change to fuel and oil with low viscosity for all components.
For details of the specified viscosity, see “20. USE OF FUEL,
COOLANT AND LUBRICANTS ACCORDING TO AMBIENT TEMPERA-
TURE”.
14.1.2 COOLANT
Antifreeze is flammable, so keep it away from flames. Never
c
smoke when handling antifreeze
Antifreeze is added to the coolant to prevent the water from
freezing when the machine is not being used.
NOTICE
Never use methanol, ethanol, or propanol-based antifreeze.
For details of the timing for changing the coolant and the propor-
tions for mixing antifreeze with the coolant, see “24.2 WHEN
REQUIRED”.
REMARK
Komatsu genuine Super Coolant (AF-ACL) is added to the cool-
ing water. Adjust the density according to the ambient temperature
at the place of operation. For details, see “24.2 WHEN REQUIRED”.
Use a Permanent Antifreeze (ethylene glycol mixed with corro-
sion inhibitor, antifoam agent, etc.) meeting the standard require-
ments as shown below. With permanent antifreeze, no change of
coolant is required for a year. If it is doubtful that an available
antifreeze meets the standard requirements, ask the supplier of that
antifreeze for information.
Standard requirements for permanent antifreeze.
l SAE _........_............................................................................... J1034
l FEDERAL
STANDARD . . . . . . . . . . ..__....................................
O-A-548D
2-45
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