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3.14
MACHINE OPERATION IN ADVERSE CONDITIONS
3.14.1
OPERATION IN COLD CONDITION
When the ambient temperature is low, starting the engine may be difficult due to decrease of oil liquidity, and the
radiator may be damaged due to coolant freezing.
FUEL/OIL
Use good low-viscosity fuel/oil for each device. For the optimum viscosity, see "LUBRICANT, FUEL & COOLANT
SPECIFICATIONS" in Chapter 4.
COOLANT
When operating or storing the machine in cold climates, the additive rate of the cooling system should match the
expected minimum outdoor temperature.
If the coolant is frozen, it may cause damage to the radiator, cylinder block and cylinder head. When being shipped
from the factory, "Long Life Coolant" is used to prevent rust and freezing of the cooling system.
When operating or storing the machine in extreme cold, check the coolant frequently to keep an appropriate
concentration. For the concentration of coolant, see "LUBRICANT, FUEL & COOLANT SPECIFICATIONS" in
Chapter 4.
BATTERY
When the ambient temperature is low, the battery capacity may decrease and the battery electrolyte may freeze.
Charge the battery full earlier than the specified interval and pay full attention to thermal insulation by covering the
battery.
When leaving the machine outdoors overnight, it is recommended to remove the battery and store it in a warm
room.
Measure the specific gravity of battery electrolyte after its temperature becomes almost the same as the outdoor
temperature, instead of immediately after operation. The charging rate can be calculated roughly by measuring the
specific gravity and using the table below.
Specific Gravity of Battery Electrolyte
Charging rate
Battery electrolyte temperature
-20 degrees C
0 degrees C
20 degrees C
100%
1.31
1.29
1.28
90%
1.29
1.28
1.26
80%
1.28
1.26
1.25
75%
1.27
1.25
1.24
AFTER OPERATION
To prevent malfunctions of the travel system components due to freezing of mud and water stuck to them, follow the
precautions below.
• Remove mud and water stuck to the machine sufficiently. Especially, be sure to drain off the water from the travel
system, and then park the machine on a dry and firm ground to prevent the travel system from freezing.
• Wipe the cylinder rod completely. If frozen mud or water is stuck to the cylinder rod surfaces, the seal may be
damaged when retracting the cylinder. Retract each cylinder to the minimum size to minimize the exposed area
of the rod.
For the storing position, see "PRECAUTIONS FOR LONG-TERM STORAGE" in Chapter 3.
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