Buhler 2180 - Manual (Page 254)

SECTION 3 - LUBRICATION AND MAINTENANCE
3-66
GENERAL MAINTENANCE
OPERATION 66
BLEED THE FUEL SYSTEM
To bleed the fuel system use the following procedure:
1. Loosen fuel line (1) at the injection pump.
2. Operate fuel lift pump piston (2) by hand until the
fuel escaping is free from air bubbles.
3. Retighten fuel line (1) when fuel free of air
bubbles escapes.
4. Continue pumping until the force needed
remains more or less constant. This allows the
fuel to be drawn into the injection pump.
1
2
115
5. Start the engine.
6. Run the engine at low idle until the engine runs
smoothly.
IMPORTANT: Check the bleed screw after the
engine starts to ensure there are no fuel leaks. Do
not crank the starter continually for more than 30
seconds at a time. Let the starter cool for two minutes
between attempts.Injection System Bleeding
It may be necessary after injection pump removal or
injector removal to purge the high pressure lines of
air to allow the engine to start.
Injection System Bleeding
If the engine fails to start after several turns bleed the
system using the following procedure:
1. “Crack” open in turn, starting at injector number 1,
the nut (1) of each high pressure lines. Crank the
engine on the starter motor to expel the air. With the
aid of an assistant, tighten the injector nuts as the
engine begins to fire.
CAUTION
Diesel fuel in the injection system is under high
pressure and can penetrate the skin. Always
wear protective gloves, safety glasses and
clothing when working on the fuel injection
system. Failure to follow these instructions can
result in serious injury. If fluid is injected into the
skin, obtain medical attention immediately or
gangrene may result.
116