11
Workshop Manual, TSD3450E, Issue 1 109
2800
Low pressure fuel system
How to eliminate air from the fuel system Operation 11-6
This procedure is used normally when the engine runs out of fuel.
1 Loosen the union of the fuel return pipe (A1). Unlock and operate the hand priming pump (A2) until fuel, free
from air, flows from the union; this procedure will require many strokes of the pump. Use a cloth or a container
to collect the excess fuel.
2 Tighten the union (A1). Operate the hand priming pump until a strong pressure is felt on the pump. Push the
priming pump plunger inward. Tighten the plunger by hand and continue immediately with the next stage.
3 Start the engine.
Caution: Do not crank the engine continuously for more than 30 seconds. Allow the starter motor to cool for
two minutes before the engine is cranked again.
4 If the engine will not start, allow the starter motor to cool for 2 minutes. Repeat steps 1 and 2 to start the
engine. Continue to eliminate air from the fuel system if:
l The engine starts, but runs unevenly.
l The engine starts, but continues to misfire or smoke.
5 Run the engine with no load until it runs smoothly.
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