1966 Ford 4000 will not turn over

[Mary Hare]

I hope you can assist me. I have a 1966 Ford 4000 and can not get to turn over. My son in law is a mechanic...he tried bleeding the filter..all good, still cranking strong but will not turn over. He then bled the injector pump..all good...but still will not turn over. He then checked the lines and there he does not get any fuel...
Cranks strong just will not turn over.
It ran great all winter and then one day I went out to start it and it cranks but would not turn over...then a couple days later it started..now just cranking. What do you think?

 

[Diggin It]

Crank and turn over are the same thing sort of. If it's cranking, it's turning over.

What it isn't doing is firing.

A mechanic would know how to check fuel flow from the tank to the injectors.


" He then checked the lines and there he does not get any fuel..."


It sounds like there is a blockage in the tank itself, or the line somewhere. Maybe something floating in the tank or a partially collapsed fuel line.

 

[Roadworthy]

What lines specifically did he check when there was no fuel? The injector lines? Start at the first line out of the fuel tank. Open it and be sure you have good flow from the tank. There may be stoppage in there. Then replace the fuel filter. Bleed the injector pump until you're sure all air is out of the system. If you've got good fuel flow through the system it should go. Oh, and check the glow plugs if it uses them, to be sure they work.

 

[Mary Hare]

I know that he checked the lines and that is where he was not getting fuel. It appeared that the pump was not pumping fuel. He bled the filter and had a great fuel flow. Then bled the injector pump and also had a good fuel flow. It was when he checked the 1st line out (closest to the steering wheel)
And did not get any fuel coming out at all. I have never checked the glow plug but I could check that. I would think if the pump itself went up I would of had more indications that it was having problems.

 

[LD1]

Not sure why you have 8n in the model if its a 4000?

Where were the "lines" not getting fuel. Did he crack them open at the injector pump or just the injector?

 

[John0829]

The last 8N rolled off the assembly line in 1952 and never had a diesel option.

If fuel is indeed getting though the filters and to the injection pump then it sounds like the fuel shutoff (the thing that kills the engine when you stop the tractor) is stuck in the closed position. Without know the true model of the machine and whether it is a manual or solenoid fuel shutoff there is no way to advise.

Just making a WAG here but I will assume it is a later model with a solenoid controlled shutoff which means it could be wiring related or defective solenoid.

 

[Mary Hare]

Sorry guys I confused this with my x’s who has a 1956 gas 8N. Mine is a 1966 Ford 4000 diesel. I took some pictures today to try to show you the sequence of the parts he bled
1st -fuel filter
2nd - injection pump
3rd - line at engine
It is a 4 cylinder as you can see
It cranks strong just will not fire.
thanks guys for teaching me the correct terminology. Farm girl who definitely don’t know much other than how to operate her.

 

[Mary Hare]

Not sure why you have 8n in the model if its a 4000?

Where were the "lines" not getting fuel. Did he crack them open at the injector pump or just the injector?

Please see my post below with pictures. Thanks for assisting me.

 

[Mary Hare]

My son in law (Richie) says it has a manual shut off for the fuel. Not a solenoid issue because the engine is cranking. Just will not fire.

 

[Mary Hare]

What lines specifically did he check when there was no fuel? The injector lines? Start at the first line out of the fuel tank. Open it and be sure you have good flow from the tank. There may be stoppage in there. Then replace the fuel filter. Bleed the injector pump until you're sure all air is out of the system. If you've got good fuel flow through the system it should go. Oh, and check the glow plugs if it uses them, to be sure they work.

There is no fuel coming from the injector pump.

 

[Mary Hare]

The last 8N rolled off the assembly line in 1952 and never had a diesel option.

If fuel is indeed getting though the filters and to the injection pump then it sounds like the fuel shutoff (the thing that kills the engine when you stop the tractor) is stuck in the closed position. Without know the true model of the machine and whether it is a manual or solenoid fuel shutoff there is no way to advise.

Just making a WAG here but I will assume it is a later model with a solenoid controlled shutoff which means it could be wiring related or defective solenoid.

My fuel shut off would be the arm I pull down to adjust the idle and speed...correct? I put the arm all the way in the up position and turn the toggle switch off that I would suppose go to the starter assembly.

 

[LD1]

First.....they didn't make 8ns in 56. But that irrelevant.

Second, no fuel shutoff is not the throttle lever.

The only way to stop a diesel is to stop the fuel, NOT just idle it down

When you turn the key off....does the tractor stop?(if so it's an electric solenoid that shuts fuel deliver off and a possible source of the problem)

The other alternative to an electric fuel stop is a manual one. Turning the key off WONT stop the tractor with this type. There is another knob or lever that needs pushed/pulled to actually stop the tractor. It can be an other potential source of your problem.if the cable or linkage is broke.

So what type do you have?

 

[John0829]

Fuel MUST, MUST come out of the injection lines or a diesel engine will not run. If fuel is passing through the filters and is getting to the injection pump but NOT coming from the injection lines when loosened while turning the engine over then the problem most likely is the fuel shut off.

Another way to check this is to locate the fuel return line from the injection pump to the fuel tank, remove it from the tank and see if fuel flows while turning the engine over. If the fuel is flowing then you are again looking at the fuel shutoff or a bad injection pump.

OK, I just got finished looking up the info on a 66' 4000, it has a 3 cylinder diesel that uses a CAV injection pump which has a manual, cable operated fuel shutoff. Make sure the cable is free and moving the lever of the shutoff on the pump. You might get lucky and a bad cable, remove the cable and try working the shutoff lever by hand and see if you can start it. If not then you need to find someone to repair the pump, seems the CAV pump is known to have some issues with the shutoff getting stuck.