Bleed the Fuel System (Engines with Electronic Fuel Systems and Stanadyne DE10 Pump)

CAUTION:

X9811
X9811-UN-23AUG88

High Pressure Fluids

Escaping fluid under pressure can penetrate the skin causing serious injury. Avoid hazards by relieving pressure before disconnecting hydraulic or other lines. Tighten all connections before applying pressure. Search for leaks with a piece of cardboard. Protect hands and body from high pressure fluids.

If an accident occurs, see a doctor immediately. Any fluid injected into the skin must be surgically removed within a few hours or gangrene may result. Doctors unfamiliar with this type of injury may call the Deere & Company Medical Department in Moline, Illinois, or other knowledgeable medical source.

Bleed the fuel system anytime the fuel system has been opened up. This includes:

  • After fuel filter changes.
  • After pump or nozzle replacement.
  • Anytime fuel lines have been disconnected.
  • After engine has run out of fuel.

The fuel system may be bled at one of several locations. Choose the best location for your engine/machine application.

  1. RG11805
    RG11805-UN-25OCT01

    Final Fuel Filter Bleed Vent Screw

    A - Bleed Vent Screw

    Loosen the air bleed vent screw (A) two full turns by hand on fuel filter base.


  2. RG11806
    RG11806-UN-25OCT01

    Fuel Supply Pump Primer Lever

    B - Primer Lever

    Operate fuel supply pump primer lever (B) or primer button on fuel filter base (if equipped).


  3. Tighten bleed plug securely, continue operating primer until pumping action is not felt

  4. Start engine and check for leaks.

    If engine will not start, it may be necessary to bleed air from fuel system at fuel injection pump or injection nozzles as explained next.


At Fuel Injection Pump

  1. RG11807
    RG11807-UN-25OCT01

    Fuel Injection Pump Return Line

    A - Fuel Return Line

    Loosen fuel return line (A) at fuel injection pump.


  2. Operate fuel supply pump primer lever or primer button on fuel filter base (if equipped).

  3. As soon as fuel flow is free from air bubbles, tighten fuel return line to specifications. Primer lever is spring-loaded and will return to normal position.

    ItemMeasurementSpecification
    Fuel Injection Pump Return LineTorque27 N˙m (20 lb-ft)


At Fuel Injection Nozzles

RG11808
RG11808-UN-25OCT01

Nozzle Fuel Pressure Line

  1. IMPORTANT: Always use a backup wrench when loosening or tightening fuel lines at nozzles and/or injection pump to avoid damage.

    Using two open-end wrenches, loosen two fuel line connections at injection nozzles.

  2. Crank engine over with starter motor for 15 seconds (but do not start engine) until fuel free from bubbles flows out of loosened connection. Retighten connection to specifications.

    ItemMeasurementSpecification
    Fuel Injection Nozzle Delivery LinesTorque27 N˙m (20 lb-ft)

  3. Repeat procedure for remaining injection nozzles (if necessary) until all air has been removed from fuel system.

If engine still will not start, see your authorized servicing dealer or engine distributor.

OUOD002,000016F-19-20060727