I have replaced my injection pump and I am back to trying to bleed the system again (not an easy tractor to bleed). I found one small leak in the fuel line feeding the banjo bold on the side of the pump and I am looking for a replacement. Original would be good, but I could go to a banjo adapter to standard plumbing lines. If anyone has any ideas of where to get a replacement, that would be good.
I am also trying to understand the fuel flow. I have a single line coming from the tank to the fuel filter. The filter shows two outlets that go to the side mount banjo bolt (by the bleed screw) and the other one to what I would have thought would be a pump output, not inlet. Is one of these a 'clean' fuel return line even though the filter arrow shows 'out'?
As for bleeding, since the 4500 is a gravity feed system, I think it would be a good idea to put an optional electric fuel pump on the tank side of the filter. When I put an air compressor in the fuel tank to give extra pressure, it often adds bubbles (unknown vent?). I am thinking a 'T' inserted in the tank to filter line that has a check valve on the extra leg of the T where a fuel pump could be added when bleeding. Right now as I open the injector pump bleed screw, and crank the engine, I just get dribbles timed with the engine crank. I have seen this before on the old pump before I got it started. Many told me I still had a bubble in the pump and I think they were right. The question is what is the easiest way to get rid of this bubble?
Thanks,
Mike
I am also trying to understand the fuel flow. I have a single line coming from the tank to the fuel filter. The filter shows two outlets that go to the side mount banjo bolt (by the bleed screw) and the other one to what I would have thought would be a pump output, not inlet. Is one of these a 'clean' fuel return line even though the filter arrow shows 'out'?
As for bleeding, since the 4500 is a gravity feed system, I think it would be a good idea to put an optional electric fuel pump on the tank side of the filter. When I put an air compressor in the fuel tank to give extra pressure, it often adds bubbles (unknown vent?). I am thinking a 'T' inserted in the tank to filter line that has a check valve on the extra leg of the T where a fuel pump could be added when bleeding. Right now as I open the injector pump bleed screw, and crank the engine, I just get dribbles timed with the engine crank. I have seen this before on the old pump before I got it started. Many told me I still had a bubble in the pump and I think they were right. The question is what is the easiest way to get rid of this bubble?
Thanks,
Mike