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Loosen the bleeder screw (1) on the pre-filter support and keep
pressing the hand pump (2) until the supply circuit is full. Ensure
that any fuel coming out is not dispersed into the environment.
Lock the bleeder screw tightly.
Start the engine and run it at idle for a few minutes to eliminate
any residual air.
Fuel filter replacement
Only proceed with the engine stopped and at low temperature, in
order to avoid the risk of burning.
Place a container for collecting the diesel under the filter support
(1).
Remove the filter (4) by unscrewing it from its relative support.
Replace the filter element and the O-ring seal (3) contained inside
the filter (4).
Carefully clean the surfaces of the support (1) in contact with the
O-ring seal (3).
Moisten the O-ring seal (3) of the new filter with engine oil.
Manually tighten the new filter (4) onto the support (1) until it
comes into contact with the gasket. Additionally tighten it using a
specific tool to a torque of 20 ± 2.5 Nm.
After the fuel filter (4) has been replaced it is possible that air bubbles
get trapped inside the fuel supply circuit.
Bleed residual air from the fuel filter (4) by loosing the vent plug
(2) connecting it to a suitable container by a transparent flexible
hose.
With the hand pump of the fuel pre-filter pump until fuel
completely free of air bubbles flows from the vent plug (2).
Tighten the vent plug (2) to prescribed torque of 10 ± 2 Nm.
Start the engine and allow it to run at minimum for a few minutes
to expel any remaining air.
If it is necessary to speed up the residual air bleeding
phase, use the hand pump also while starting.
08_012_F
