Komatsu D31EX-21, Руководство по эксплуатации и техническому обслуживанию, Страница: 227 / 256

MAINTENANCE
SERVICE PROCEDURE
4-47
5. Return the key in the starting switch to the ON position and
wait for approx. 30 seconds.
6. Turn the key in the starting switch to START and hold it there for 20 seconds.
When this is done, the starting motor will be actuated for approx. 2 seconds and then will stop, but the engine
will turn. Even when the engine turns, keep the starting switch at the START position.
Keeping the starting switch at the START position will actuate the electric pump and the air can be bled.
NOTICE
Even when the engine turns, keep the starting switch at the START position for approx. 20 seconds. The
air will be bled while it is being held at the START position.
If the starting switch is returned to the ON position immediately the engine starts, the air bleeding opera-
tion will not be completed.
7. Return the starting switch to the ON position.
When this is done, if the engine does not continue to turn and stops, repeat the operation in the Step 6.
NOTICE
When the engine has run out of fuel also, fill the fuel tank, then use the same method and operate the
starting switch for 20 seconds each two or three times to bleed the air.
The air bleeding time can be shortened if the fuel tank is full.
8. After replacing the filter cartridge, start the engine and check that there is no leakage of oil from the filter seal
surface. If there is any oil leakage, check the tightening condition of the filter cartridge. If there is still leakage,
follow the procedure in Steps 1 and 2 of “REPLACE FUEL FILTER CARTRIDGE (4-45)“ to remove the filter
cartridge and check the packing surface for damage or foreign material caught in the surface.
If there is any damage or foreign material caught in the packing surface, replace the packing with a new part.
For details, see “REPLACE FUEL FILTER CARTRIDGE (4-45)“, Steps 3 to 6.