Bleed Air From Fuel Circuit - Komatsu D155A-6 Operation & Maintenance Manual

SERVICE PROCEDURE

BLEED AIR FROM FUEL CIRCUIT

This machine 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.
When fuel filter has been replaced
When engine has run out of fuel
When starting the engine for the first time after replacing the supply pump or modifying the piping or any other
parts
PROCEDURE FOR BLEEDING AIR
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 (1) to the OFF position (A).
2. Check that fuel tank valve (1) is open.
3. Open air bleeding valve (2).
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WARNING
MAINTENANCE