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Concur with Lee. Look in the oil first, if the level has risen, there is a leak in the diaphram of the transfer pump. Easy, cheap fix. Incidently, the diaphram can be completely ripped and the tractor will still run if the fuel lines are air tight. The injector pump will keep a prime just like a siphon. I found my transfer pump leak by observing a stream of oil coming from the dipstick hole, pulled the dipstick out (dumb move) and got covered in oil/diesel mix. Thank goodness we weren't operating under load, just idle. If there is diesel exiting a section of the fuel line, it is logical that air can enter. The engine can handle a small amount of air in the fuel lines so long as there isn't enough to block the flow of fuel. The firemen at our station don't bleed the fuel filter, just fire up that big ol Detroit at about half throttle and let it ride out the air bubble. Coughs a little, burps and goes on roaring. Here's what may have happened: You got shut down under load, which pulled air into the fuel line. The bleed got most of the air, but it sucked some more in or hit another bubble and shut down again after a minute. Then the next bleed finished off the air. So you have to get the fuel lines air tight and that means fuel tight, too. If you have to put on a new transfer pump, there will be new bress or copper washers for the banjo fitting. get some extras for the top of the fuel filter canister. Don't forget the rubber lines, if they don't have compression clamps, put some on. Let us know how this works out, we like good news.
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