Komatsu D31EX-21, Operation & Maintenance Manual, Page: 115 / 256

OPERATION
OPERATION
3-63
CHECK BEFORE STARTING 3
Always check the items in this section before starting the engine each day.
CHECK COOLANT LEVEL, ADD COOLANT
WARNING
q
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.
q
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 check the coolant level in this condition, there is a
hazard of burns. Wait for the temperature to go down, then turn the cap slowly to release the pres-
sure before removing 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 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 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.
FULL
LOW