New 1966 Ford 5000 Owner

Dave3

New User
Hey Guys! I decided to go from a 1949 Ford 8N to a 1966 Ford 5000 diesel. Needed the extra size and horsepower to pull a 8' wide Bush Hog.
This is my first diesel and need a little help.
1st-I have 3 fuel return lines. One from the fuel filter to a dead end on the left side of the tractor. The next fuel return line is from the injectors to the top of the fuel tank. I guess it is going back to the tank, but have not confirmed by removing the cowling.The third fuel return line starts at the beginning of the intake manifold and dead ends on the left side of the tractor. Question: Should all 3 be linked together and go back to the fuel tank? Wouldn't the one from the intake manifold create pressure in the gas tank?
2nd-Which is the best shop in both price and quality of work to rebuild my injector pump? What is a typical price range for this work?
3rd-I went up a small hill today and the tractor sputtered and quit. I let it sit for a few minutes and it started for a short time(minute or less), but quit again. I manually pumped the fuel lift pump and it started. Is this a sign of trash in the lines?
 
I'm not sure what the one from the fuel filter is for, but the one coming from the intake manifold is for the thermostart unit and it should be tee'd into the line going from the injectors back to the pump. The thermostart is a cold temperature starting aid that should have a fuel line and an electrical wire going to it. The electric wire provides 12 volts that heats up an electric heating element which in turn causes a valve to open and let some fuel dribble into the manifold where it hits the hot element and lights on fire, and then when you turn the key to the start position the flaming fuel gets sucked into the cylinders and helps with detonation when the engine is cold.
 
(quoted from post at 19:45:59 05/17/20) I'm not sure what the one from the fuel filter is for, but the one coming from the intake manifold is for the thermostart unit and it should be tee'd into the line going from the injectors back to the pump. The thermostart is a cold temperature starting aid that should have a fuel line and an electrical wire going to it. The electric wire provides 12 volts that heats up an electric heating element which in turn causes a valve to open and let some fuel dribble into the manifold where it hits the hot element and lights on fire, and then when you turn the key to the start position the flaming fuel gets sucked into the cylinders and helps with detonation when the engine is cold.

Thanks Sean! I read about the fuel reservoir for in-take heater. What is the best book to have on the Ford 5000? I have the Service Manual and Operator Manual, but neither one gives the details I want. I believe changing the fuel filters often on these tractors is critical? Keeping injectors clean is also critical? Not sure why it would of quit going up a small hill other than something momentarily clogged the fuel supply? I did get a green indicator on the dashboard. Looked like a green lighting bolt or arrow. It was only partially illuminated. Do you know what the light means?
 
How full was the tank when it quit while going up the hill? If it was near empty then the fuel might have just flowed to the back of the tank so there was no fuel available at the front of the tank where the pickup tube and shutoff valve are located.
 

I had just filled the tank to full the day before. Maybe that line coming off the fuel filter that is capped with a machine screw sucked in some air? Can you get an air bubble in the line? Funny how i manually pumped the fuel lift arm and it started.

It could be trash in the fuel filters?

I'm going to change the fuel filters this weekend and see if that helps. I'm also getting a new fuel tank.
 

Inside bottom looks rusted and dirty. I would rather replace it and not have the headache of a stalled machine b/c of a fuel line getting clogged by dirt for the fuel tank. I have walked home from the field more than once! Looks like it might be as old as the tractor!
Do you know who has the best deals on 1966 Ford 5000 fuel tanks?
 

Haven't priced one, Haven't had issues with our 66 or 74 5000 fuel tanks.
You do know there's a screen in the fuel shutoff that's screwed into the tank, if it's not there and trash or bug can cause fueling issues.

Just looked on this site $150-170
I'd drain the tank and check the screen on that $10 valve first.
 
Good idea! All about saving some money.
How often do you change the oil in your injector pump?
How often do you change fuel filters?
 

Change the oil in the pump every time I change the engine oil which is once a year or at 300 hrs
Fuel filters depends on how much we run the tractor, I have several tractors so most don't see more than 150-200 hrs per year, I have filters on my storage tank and can usually run fuel filters for a couple of years, but if it acts down on power we'll change the filters during the season, factory service manual says change at 300 hours
 

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