Komatsu D155A-6 Operation & Maintenance Manual page 288

MAINTENANCE MAINTENANCE
4. Operate switch (3) of the electric priming pump to the ON
position. Lamp (4) will flash and the electric priming pump will
start.
REMARK
The electric priming pump switch has a built-in timer, and this actuates and stops the pump automatically.
While the lamp is flashing, the electric priming pump will stop, but this does not indicate any abnormality.
If the switch is turned to the OFF position when the lamp is lighted up, the lamp will go out and the electric priming
pump will stop.
5. When the specified time (approx. 7 minutes) has passed, lamp (4) automatically goes out and the electric
priming pump stops.
6. If the fuel has been drained from the fuel circuit, such as when the engine has run out of fuel and stopped, or
maintenance has been carried out on the fuel hoses or tubes, or the supply pump has been replaced, turn the
switch (3) for the electric priming pump to the ON position again after the electric priming pump stops
automatically (lamp goes out).
7. When the lamp (4) goes out, the air bleed operation is completed.
8. After the air is completely bled from the fuel circuit and the engine starts, stop the engine and close air bleed
valve (2).
If the engine does not start, the air bleed operation has probably not been completed. Repeat Steps 1-5 to bleed
the air.
NOTICE
Do not keep the starting motor rotating continuously for more than 20 seconds.
If the engine will not start, wait for at least 2 minutes before trying to start the engine again.
SERVICE PROCEDURE SERVICE PROCEDURE
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