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How to Bleed Air from a Lombardini Injection Pump

Model: (Various brands) Various
Part: Fuel pump

If you have run out of diesel in your agricultural vehicle and, after refilling the fuel, the engine does not start, air bubbles must have formed in the injection system. Therefore, it is necessary to slightly loosen the bleed bolt with an 8 mm spanner and let the air out while repeatedly lowering the lever located under the pump to draw diesel from the tank. After completing this procedure, try to start the tractor again, which should now start without any issues.

Updated on 18 May 2026 by ScegliAuto

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