Fuel System - Volvo Penta D12-AUX Operator's Manual

Maintenance: Fuel System

Fuel system

WARNING! Fire hazard. Work on the fuel system should be carried out on a cold engine. Fuel leaks and
spills on hot hot surfaces or electrical componentsmay cause fire.
WARNING! Hot fuel may cause burns.
IMPORTANT! All unit injector maintenance must be carried out at an authorized workshop
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Fuel system venting
The fuel system must be vented, e.g. after changing
fuel filter, if the fuel tank has been run dry and after
long stops.
Single filter and Switchable filters
Stationary engine:
1. Put a suitable vessel underneath the fuel filter.
2. Remove the protective cap from the venting nipple
(1) on the filter bracket. Connect a transparent
plastic hose to the nipple.
3. Open the venting nipple and pump up fuel with
the hand pump (2) until air-free fuel flows out.
Tighten the venting nipple while fuel is flowing
out. Repeat with second filter.
4. Remove the hose and put the protective cap back
on the venting nipple.
5. If the tank has been run dry or the engine, for
some reason, has been emptied of fuel, open the
venting nipple (3) at the front of the engine block
and vent in the same way.
6. Run the engine at idling speed for a couple of
minutes to get any remaining air out of the sys-
tem. Then close the vent (3) on the engine and
make sure that there are no leaks.