Posted by Owen Aaland on October 01, 2008 at 11:23:33 from (65.161.86.107):
In Reply to: IH 806 will not start posted by Shahn on September 30, 2008 at 13:09:53:
Fuel enters the injection pump at the rear where the charge pump is located. The charge pump will gravity bleed. As the engine is cranked over the charge pump will fill the case and any air will be pumped out the return fitting on the top of the pump and return to the fuel tank. If the return fitting or line is plugged the pump will not have the air bled out but also because pressure will build in the case, equal pressure on each side of the high pressure pistons will not allow them to move out and receive a fuel charge. The result will be no fuel delivery to the nozzles.
Remove the return line from the top of the pump. Crank the engine to see if there is fuel being pumped out. If not, remove the restrictor fitting from the top of the pump and check again for fuel being pumped out. If you still do not get fuel, remove the two screws that hold the side cover in place. Remove the cover and check to see that the front ring that you see in the opening is turning when the engine is cranking. If the pump ring does not turn, the pump head has seized and the drive shaft has been twisted off.
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