Fuel system - Service procedures
Bleeding Engines without fuel shut-off valve and engines with fuel shut-off valve supplied with voltage during stop 1 Open the bleeding screw (1) on the cover for the fuel filters. Pump up fuel with the manual pump (2) until it is free from air bubbles. Tighten the screw while the fuel flows out.
If the injection pump needs bleeding, release the connection for the overflow valve (4) at the pump and continue pumping by hand until air-free fuel flows out. Tighten the connection while fuel flows out. Continue to pump so that an adequate feed pressure is obtained. Check that the connection seals well. NOTE! Do not bleed at the pressure equalizer! Because of the positioning of the pressure equalizer on most engines the sealing washer at the connection to the injection pump can be-come incorrectly positioned after removal, resulting in leakage.
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3
Continue to pump in order to maintain a substantial feed pressure. Further bleeding is not normally required.
Start the engine. If the engine does not start after a short moment, release the pressure pipe at the injectors one or two turns. Set the injection pump’s throttle lever in max. position and turn over the engine with the starter motor until fuel is forced forwards. Tighten the pressure pipe nuts.
Bleeding of the fuel system 1. Bleeding screw 2. Manual pump 3. Pressure equalizer 4. Overflow valve
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