'81 F2 fuel restriction

[pea_grower]

Cutting wheat, had a light indicating fuel restriction. It was supposed to rain, and I wanted to get the wheat off the machine. Got it over to a gravity wagon, unloaded, throttled back and that was it.

Restriction seemed to be in the fuel line. Replaced filter, filled the fuel tank, gravity filled the filter. Used the hand pump but fuel went everywhere. Not sure I'm getting fuel to the injection pump. Not getting any fuel out the top when I break lines loose and crank. Injection pump was overhauled 14 years ago.

Could the fuel restriction cause injector pump failure? Will a full fuel tank push fuel to the pump to pick up? Got any thoughts?

 

[roper4570]

Try by-passing the priming pump. Have replaced many of those as they start sucking air or internal check valve is bad or has trash in it.

 

[Skyhighballoon(MO)]

Cutting wheat, had a light indicating fuel restriction. It was supposed to rain, and I wanted to get the wheat off the machine. Got it over to a gravity wagon, unloaded, throttled back and that was it.

Restriction seemed to be in the fuel line. Replaced filter, filled the fuel tank, gravity filled the filter. Used the hand pump but fuel went everywhere. Not sure I'm getting fuel to the injection pump. Not getting any fuel out the top when I break lines loose and crank. Injection pump was overhauled 14 years ago.

Could the fuel restriction cause injector pump failure? Will a full fuel tank push fuel to the pump to pick up? Got any thoughts?

I have a 1981 F2. I have had that exact same issue numerous times in the past. For me it had nothing to do with the primer, fuel filter or injection pump. This issue for me was the sediment bowl on the right rear where fuel comes from the tank. I think my combine had algae in the fuel when I got it. Several does of algae killer I think got it but I get these little black blobs that clog the inlet into the glass sediment bowl. When you remove the glass bowl (assuming you have one), do you get two big streams of fuel coming out of the inlet? If you don't, that you got gunk clogged there restricting flow. A wire or small plastic zip tie poking up each side usually gets it going for a while. But it's the design of the restriction with those two slits on each side of the inlet that catches the gunk coming out of the tank that the fuel filter is going to easily catch anyway. Drill out bigger the two slits on each side of the inlet or just cut off that part of the inlet pipe with the two slits so you have larger inlet to the glass bowl that doesn't catch junk. When I did that, the problem went away for good.

 

[rrlund]

I had a kernel of corn in the tank one time that got down in the stem of the sediment bowl assembly and partially plugged it. It was good until it got under load.

 

[paul]

Had the sediment bowl screen plug badly on a F2 I bought, they put old bad fuel in it before taking it to the auction. Was a bad deal, I drove it home 45 miles and had to stop and clear the screen about 5 times, the. It was a mess getting it going when home. Blah.

Paul

 

[big orange]

Does the combine have a filter in the bottom of the tank?

 

[DrAllis]

I think an 81 model should have. If you can get your forearm into the fuel tank reach all the way to the bottom to see if it is still in there. Pull it out and clean it.