7700 combine engine won't start

Dad and I bought a 7700 out of a neighbors pasture because we had an idea to use the engine in a 4010 that went down. Nixed that idea and got another 4010 engine so decided to tinker with the combine engine. It sat at least 15 years, perhaps 20, but it was only lightly stuck and we got it broke loose and turning freely. Took intake manifold off to get some oil down the intake valves and cranked it over and oiled some more and replaced manifold. Continued cranking and it would not fire, tried either and it would hit on that. So we confirmed fuel flow from filters at the pump and then cracked all injection lines and cranked it over and we are getting zero fuel delivery, no wetness at all with throttle lever at wide open. This engine is like a 4430 tractor so the inline pump is on the back side where its not easy to get at and we"ve never worked on the Bosch pump. What should we do in order to determine why the fuel rack seems to be stuck in no fuel position? The stop cable was pushed in all these years but we did get it to move stubbornly after getting the cable somewhat freed up. The throttle lever moves freely enough and works against spring tension.

had the same thing two years ago. we had to loosen the injector lines at the pump and it finnally started. we had also did the light oil in the intake manifold trick with no luck.

Is the electric pump working down below the fuel tank? It pumps fuel up to the engine?

I can try cranking it longer and see if it will finally bleed out. I tried about 45 seconds with no fuel yet.

Granted one doesn't need to get the starter hot but 45 seconds seems fairly short time to bleed any air out. I'll second what Roger asked "is tank electric fuel pump operating" when trying to crank engine?

I will try it some more. The electric pump is providing fuel to the injection pump.

Be careful that the rack is not stuck open when you do get it to light.I have experienced a near runaway from that,but I had the intake hose off the turbo and a block of wood to cover it over to smother the engine.Those racks can,and do,stick if they are setting a long time,when that happens the governor is unable to return it to slow it down,and an engine explosion can happen.

We finally got the air bled out of the injectors and got it going today and it did just as you said. Seems like it never came out of the excess fuel for starting. The tach in the combine showed 2800 rpm and it was still slowly gaining speed. The stop cable had no effect on it so we cut the air off. Now we need to learn about taking the throttle control and fuel shutoff linkage out of a Bosch pump to free it up.