Komatsu D155A-6 Operation & Maintenance Manual page 149

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OPERATION
CHECK COOLANT LEVEL, ADD COOLANT
Normally, do not open the radiator cap. When checking the coolant level, check the sub-tank when the engine is cold.
Do not remove the cap when the radiator coolant is hot. Boiling coolant may spurt out. After the coolant temperature goes
down, turn the cap slowly to release the pressure, then remove it.
1. Open the engine side cover on the left side of the chassis, and
check that the coolant is between the FULL and LOW marks on
sub-tank (1). If the coolant level is low, add coolant to the FULL
level through the coolant filler port in sub-tank (1).
REMARK
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 coolant, tighten the cap securely.
3. If the sub-tank is empty, check for leakage of coolant, then add
it to the radiator and sub-tank.
4. After adding coolant, close the engine side cover.
3 - 98
WARNING
OPERATION

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