AGCO Power 49 - Fuel System Maintenance

3.13 Fuel system
3.13.1 Bleeding the fuel system
WARNING:
Do not make any work at the common rail high pressure fuel system when the engine is
running. Wait at least 30 seconds after stopping the engine .The first high pressure
component has to be loosened slowly, so that the pressure inside the fuel system can
adjust to ambient pressure. If the jet of high pressure fuel contacts your skin, fuel
penetrates the skin causing severe injuries. Get medical help immediately!
Procedure
1.
Open the bleeding plug on the pre-filter
bracket.
2.
Put a transparent hose in the plug hole and
lead it into a suitable container.
3.
Pump fuel with the hand pump on top of the
pre-filter.
4.
Pump with the hand pump until there are no
air bubbles in the fuel stream.
5.
Remove the hose and turn in the bleeding
plug.
6.
Clean the engine of eventual overspill fuel.
Fig. 102
7.
Start the engine. The fuel system removes automatically the air left in the system.
NOTE: Do not use the hand pump when the engine is running. Do not use any tools or excessive
force on the pre-filter hand pump.
NOTE: The fuel system is equipped with a pressure sensor that alarms before interference has
developed. Reasons can be for instance:
• Empty fuel tank.
• Clogged fuel filters.
• Suction piping clogged or leaking air.
• Unsuitable fuel (e.g. summer fuel in the winter).
NOTE: Use of spirits as antifreeze is not useful or recommended at all. It makes the fuel solidify and
weakens the lubricating qualities of the fuel and increases the possibility of corrosion.
3.13.2 Measuring fuel feed pressure
Procedure
1.
Clean the pre-filter, the fuel filter and the related fuel pipes from the outside.
3. Maintenance
4th Generation Engines 3-61
8370 79492