32
Fuel system
All work on the engine injection pump or injectors must be carried out at an authorized workshop. Use only the
recommended grade of fuel: See the chapter “Technical Data”.
WARNING! Fire risk. Work on the fuel injection system must be carried out on a cold engine. A fuel spill
onto a hot surface or an electrical component can cause a fire. Store fuel soaked rags and other flammable
material in fireproof conditions.
Venting the fuel system
The fuel system must be vented after the fuel filters
have been replaced or after refilling the fuel tank after it
has been run dry.
1. Open vent screw (1) on the filter mounting approx.
three turns. Avoid fuel spillage. Use rags around
the venting point.
2. Pump the fuel using hand pump (2) until there are
no more air bubbles visible in the fuel. Continue
pumping and at the same time tighten the venting
screw. If the pump effect is poor, turn the engine
over slightly so that the pump drive cam changes
position.
3. Slacken off the injector delivery line nuts and set
the engine speed control to wide open throttle
(WOT). Turn the engine over at WOT with the start-
er motor until fuel comes out of the delivery lines.
Avoid fuel spillage. Tighten delivery line nuts.
4. Start the engine and check for leaks.
WARNING! Approaching a running engine is
dangerous. Watch out for rotating components
and hot surfaces.
Fuel filter Replacing
Clean the filter mounting. To avoid fuel spills put a
plastic bag over the filter before it is unscrewed.
Unscrew the filter. Moisten the rubber filter gasket with
a little oil. Screw on the new filter by hand until it is in
contact with the mating surface. And then a further
half turn but no more! Vent fuel system. Deposit the
old filter at a properly designated disposal site.
Start the engine and check for leaks.
WARNING! Approaching a running engine is
dangerous. Watch out for rotating components
and hot surfaces.
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