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. When carrying out work on the fuel system make sure the engine is cold. 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 fuel filters have been replaced or after refilling the fuel tank after it has been run dry.
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1. Open vent screw (1) on the filter mounting approx. three turns. Avoid fuel spillage. Use rags around the venting point.
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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. NOTE! If the pump output is low, turn the engine so that the marking on the pulley is at “TOP” (see the illustration). If the pump output is still low, turn the engine one more revolution to “TOP”. There is a strainer (3) in the intake manifold for the pump. The strainer does not normally need to be cleaned since the engine should be installed with a fuel pre-filter. If there is no fuel pre-filter installed, low output may be due to a blocked strainer. 3. Slacken off the injector delivery line nuts (4) and set the engine speed control to wide open throttle (WOT). Turn the engine over at WOT with the starter 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 or working on a running engine is dangerous. Watch out for rotating components and hot surfaces.
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