Have a case 400 diesel, had a running engine in it when I bought the tractor 3 years ago, Engine was weak and head gasket finally let go at a plow day this summer. When I bought the tractor it came with another engine. I installed the other engine and can not get it to prime up American Bosch PSB pump. The spare engine has sat for approx 4 years or more inside. Id roll the engine over every once and a while. I hooked all the fuel lines up and performed the case bleeding procedure had fuel everywhere. Had injector lines on pump lose and no fuel coming out. Removed supply line to pump had a small stream coming out, Differently would of thought more fuel coming out changed out lift pump from engine that was running and didn't make a difference, Changed filters to other style that was on the runner. Fuel tank is full used compressor to push air in the tank. Cracked all the lines had fuel coming out at all fittings. Does anyone have any ideas? Or how much fuel should come out of the transfer pump?