4000 Ford

Dennis(IA) · Aug 31, 2016

Helping a neighbor with his 4000 gas. He was not getting gas to the carburetor. I looked at the tractor and found that someone bypassed the fuel pump on this tractor, so the tank must have a fair amount of fuel in it so gravity can get the gas to the carburetor.

Question: The fuel shut off under the tank does not stop the gas flow. It turns only about 1/2 turn, is this correct or should it turn several turns when going from off to on?

I thought about removing the valve, but this may create more problems.

I found a 12V fuel pump for about $35 this my be a cure for his problem. The old gas lines were cut and pinched, and the fuel pump may not work so this would be a big job.

Sean in PA · Aug 31, 2016

I assume from what you have posted that this is a later 3 cylinder 4000, not the earlier 4 cylinder 4000 that did not have a factory fuel pump to begin with. If that is the case, then yes, the fuel shutoff should turn a few turns from completely open to completely closed.

If you go with an electric fuel pump make sure that it's one that only puts out about 4 to 5 psi. Lots of electric fuel pumps out there put out a lot more than that and they will overpower the float valve and end up flooding the intake.

Dennis(IA) · Aug 31, 2016

Yes it is a 3 cyl. I don't know much about these tractors, so when I saw the pinched off lines and followed them I found the fuel pump. Also looking at the gas tank and the carburetor I could see that it would run if the tank was not near empty. Thanks

Ultradog MN · Aug 31, 2016

Yeah,
They'll start and run on gravity and let you piddle around some but won't give you full horsepower without a pump.
My 4000 gasser had the pump bypassed and the prior owner was able to use it to feed large rounds to his couple of nags just fine on gravity.
When I got it and tried to work it a bit it was a poor excuse for a 50 hp tractor.
I put a small electric pump on it and that made all the difference.
I have all the oem parts now so one of these days i will fix it back to original.
I would go ahead and service that shut off valve if I were you.
Remove it and clean the screen in the top of it.
Find out why it doesn't turn several turns like it should. Might be full of crud.
Also, there was an inline sediment bowl with a filter in it behind the carb - if it's still there And a filter in the brass connector where the fuel line goes into the carb. Make sure those are free flowing too.
That fuel system was good,though rather circuitous. Just needed cleaning/servicing every 20 years or so.

guzzibob · Aug 31, 2016

Word of warning. They are aftermarket replacment fuel pumps out there . If you purchase one be sure to check the fuel ptessure . I bought one that didn't have enough overrun travel , the pressure went through the roof. I checked it with a gauge as it passed 60psi I shut it down. Could have been a bad deal.

Dennis(IA) · Aug 31, 2016

Talked to the guy tonight and he is going to run the tractor the way it is. Keep it full of gas and do the little chores he has. Thanks for all your information.

teddythegreek · Sep 11, 2016

wait a minute, you meet theach 4000 I just got had a fuel pump?

Sean in PA · Sep 12, 2016

(quoted from post at 21:22:52 09/11/16) wait a minute, you meet theach 4000 I just got had a fuel pump?

If you're talking about the '66 4000 that you mentioned in your other post, then yes, it had a fuel pump when it left the factory. It was mounted on the front of the engine on the left side. Fuel line went from shutoff valve at tank forward along the right side of the engine all the way to the front, then across the front of the engine to the pump, then from the pump back across the front of the engine and back along the right side to the sediment bowl by the carb.

4000 Ford

Dennis(IA)

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Ultradog MN

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