Well this is driving me absolutely insane. I've tried about 5 times now to bleed the air from this tractor. so we have:
1) cleaned fuel tank
2) new Orings added to the tanks/sump taps.
3) new diesel filter
4) exchanged lift pump (as I kept getting air at the injection pump bleeder ... and thought maybe the lift pump was introducing air)
5) endless deisel wasted all over the ground.
Ok, so I have the bleeder half way up the pump, usually always free of air, the bleed bolt at the top of the pump, there is no air there. The is always air at the pump return line if I crack it at the filter when trying to start it .... there seems to be endless air at the injectors if I leave them cracked.
I've managed it start it a few times, but it runs for about 10seconds and I've got air in the injector lines again. Where on earth is the air coming from ?? This is just nuts.
Maybe the new filter doesn't fit the housing well enough? but surely given the lift pump, this would create a leak of deisel to the outside world, not an air leak to the pump.
Can the pump itself be sucking air from the outside world .... somehow
1) cleaned fuel tank
2) new Orings added to the tanks/sump taps.
3) new diesel filter
4) exchanged lift pump (as I kept getting air at the injection pump bleeder ... and thought maybe the lift pump was introducing air)
5) endless deisel wasted all over the ground.
Ok, so I have the bleeder half way up the pump, usually always free of air, the bleed bolt at the top of the pump, there is no air there. The is always air at the pump return line if I crack it at the filter when trying to start it .... there seems to be endless air at the injectors if I leave them cracked.
I've managed it start it a few times, but it runs for about 10seconds and I've got air in the injector lines again. Where on earth is the air coming from ?? This is just nuts.
Maybe the new filter doesn't fit the housing well enough? but surely given the lift pump, this would create a leak of deisel to the outside world, not an air leak to the pump.
Can the pump itself be sucking air from the outside world .... somehow