Komatsu PC2000-8 BACKHOE, Operation & Maintenance Manual

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MAINTENANCE
MAINTENANCE PROCEDURE
4-47
Bleeding air from fuel circuit with the electric priming pump
(Only poor fuel arrangement specification machines)
Poor fuel arrangement specification machines is equipped with an electric priming pump to bleed the air from the
fuel circuit. In the following cases, use the procedure below to bleed the air.
q
When fuel filter has been replaced
q
When engine has run out of fuel
q
When starting the engine for the first time after replacing the supply pump or modifying the piping or any other
parts
WARNING
q
After the engine is stopped, all parts are at high temperature, so there is danger of suffering burns.
Wait for all parts to cool down before starting the operation.
q
When using the electric priming pump, do not loosen the air bleed plug for the fuel circuit. When the
electric priming pump is operated, pressure is applied to the fuel circuit, so if the air bleed plug is
loosened, fuel will spurt out and create a dangerous situation.
1. Turn the key in starting switch to the OFF position (A) and
stop the engine.
2. Open air bleeding valve (1) and (2).
(Left side)