Operator`s manual

106 Maintenance
Bleeding the D12D Engine
Note: Prior to bleeding the engine, make
sure the key is in the ignition in the “ON”
mode (engine is stopped) and the parking
brakes are applied. Once the 4 minute
bleeding process is complete, you can start
the engine.
To bleed the D12D engine simply press
or push the fuel priming activation switch
located on the right hand side of the steering
column, in the dash. This is a non-locking
switch, which when pressed, sends a signal
to the Vehicle ECU (VECU). The VECU
then transmits the request via a control data
link to the EECU. The EECU activates the
pump for approximately 4 minutes.
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If you have problems starting the engine,
restart the bleeding procedure and try
restarting the engine again after bleeding
is complete. If the engine does not start
following this procedure contact your local
Volvo Truck dealer.