wesley1256 said: (quoted from post at 16:05:30 06/23/11) I just bought a IH 1256 (my first) was running good for about an hour after fuel filters were changed, then she puked. After an hour or so trying to get it running the best I could do was run 15-45 seconds, then I opened the "1/2" head bolt on the side of the fuel pump and it stays running when I tighten it she shuts down. Any Ideas ??? I have good fuel flow to the pump and the system seems to be clean. Thanks for any help!
Common problem with the roosa pump, the restrictor fitting on the pump cover where the return fitting connects is plugged with pieces of the coupling ring that drives the governor cage. They deteriorate over time. Unless you are fairly mechanical and pay very close to parts placement on disassembly it will be to your benefit to have a diesel pump rebuilder do it. The bleeder screw being closed is allowing the internal pump pressure to build to a point that the pump quits delivering fuel to the injectors. When the screw is cracked open the pressure is released and it will run.
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