Bleeding The Fuel System; Water In Fuel - Volvo Penta D4 Operator's Manual

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Bleeding the fuel system

The fuel system must be bled e.g. after changing fuel
filter, if the fuel tank has been run dry and after long
stops.
1. Attach a transparent hose to the air vent valve (1).
2. Open the air vent valve and pump fuel using the
3. Pump another 10 strokes with the hand pump. The
4. Remove the hose and refit the protective cap on

Water in fuel

Draining the fuel filter
If the pop-up "water in fuel" on the tachometer display
or the lamp
on, there is too much water in the water separator on
the fuel filter. Proceed as follows to rectify this:
1. Stop the engine and take the starter key out of the
2. Remove the cable from the water separator (1).
3. Place a suitable receptacle under the fuel filter
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4. Fasten the cable from the water separator (1).
Draining of fuel pre-filter.
The fuel pre-filter is an accessory.
Position a container under the fuel filter. On the fuel
filter first open the venting screw (1) approximately
4 turns. Drain off water and contaminants using the
cock/plug at the bottom of the filter. Vent fuel system.
WARNING! Never detach the pressure pipes.
Lead the hose to a suitable receptacle to avoid
spillage.
hand pump (2) until the fuel running out is free
from air bubbles. Close and tighten the air vent
valve.
resistance in the hand pump may seem quite high
and is normal and necessary for bleeding the sys-
tem.
the air vent valve.
WARNING! Working on or approaching a run-
ning engine is a safety hazard. Beware of rotating
parts and hot surfaces.
on the optional alarm display comes
starter switch.
and carefully unscrew the water separator (2)
enough to allow the water to run out. Screw in the
water separator until it bottoms against the filter.
Then, screw a further 1/4 to 1/2 of a turn.
IMPORTANT! Wait a few hours after the engine
has been turned off before draining the filter.
Maintenance. Fuel system
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