Komatsu D65EX-12 Operation & Maintenance Manual page 91

OPERATION
CHECK BEFORE STARTING
Always carry out the items of the checks in this section before starting the engine each day.
CHECK COOLANT LEVEL, ADD WATER
Do not open the radiator cap unless necessary. When checking the coolant, always wait for the
engine to cool down and check the sub tank.
Immediately after the engine is stopped, the coolant is at a high temperature and the radiator is under
high internal pressure. If the cap is removed to drain the coolant in this condition, there is a hazard of
burns. Wait for the temperature to go down, then turn the cap slowly to release the pressure before
removing it.
1. Open the engine side cover on the left side of the chas-
sis, and check that the coolant is between the FULL and
LOW marks on sub-tank (1). If the water level is low, add
water to the FULL level through the water filler port in
sub-tank (1).
REMARK
In summer, the coolant may overflow from the sub-tank drain
hose. This is no problem. It occurs because too much coolant
has been added.
2. After adding water, tighten the cap securely.
3. If the sub-tank is empty, check for leakage of water, then
add water to the radiator and sub-tank.
4. After adding water, close the engine side cover.
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WARNING
OPERATION