FORD 8N QUESTION

[ET HUGEN]

I recently bought a Ford 8n and when the pto is engaged and i step on the clutch. the 3 point drops. is this normal ? if not any suggestions on where to start would be greatly appreciated. Thanks.

 

[Lumpy]

Nope! Time to take the side inspection covers off and do some investigating. I will bet you have to pull the top cover (under the seat) and replace the piston in the hyd ram. My 2n will hold a 2x14 plow up for days, not running of course. I opted to replace the piston with a o-ring style piston which is for the NAA. Do it and never look back. There is only about $3.00 difference between the 2 pistons.

 

[starnowski]

Tons of info on this site about this common issue. Search for 3 point dropping, lift cylinder, etc. Endless amount of troubleshooting tactics and rebuild techniques. I rebuilt mine from info on this site but first step is to diagnose problem.

 

[Dell (WA)]

ET HUGEN........you do know everytime you clomp yer clod hoppers on the clutch pedal, the tranny driven PTO pump stops pumping, don't you? Without the constant renewal of hydraulic pressure, yer LEAKY hydraulic 3-point system is gonna drop. Isn't that amazing?

Where to start? Remove yer 6"-roundy dipstick plate behind yer right heel and look fer squirts and swirls. Squirts should be intuitively obvious. A leaky hydraulic pressure relief valve causes swirls. And NO, it won't hurt 'nuttin' to remove the plate and try to lift ennythang. ........Dell

 

[Bruce(VA)]

No, as others have said, that's not normal. Time for some troubleshooting.

If the arms drop w/ the tractor off or the clutch depressed, chances are you have a worn lift cylinder or piston (or both), a blown top cover gasket or a leaky pressure relief valve. Take the inspection plate w/ the dipstick off. Lift a heavy implement & look inside w/ the tractor running & the PTO engaged to see if you notice oil running from the top cover. If oil is running steadily from the top cover the chances are the lift cylinder needs to be rebuilt. It’s less likely, but a possibility, that the top cover gasket is bad. (It’s very difficult to detect the exact source of the oil leaking inside of the top cover while looking through the inspection port). If no oil is running down from the top cover, look at the rear of the pump in the oil with the load still on it and see if you notice turbulence in the bottom. (Some movement of oil will be normal with the PTO shaft turning). You could have a weak pressure relief valve which will be detected by turbulence in the oil. To check for a slow leak, lift a heavy implement, turn the tractor off & put a ½ inch clear plastic hose on the end of the valve & stick the other end of the hose through the inspection port. With pressure in the pump, a bad valve will likely show some fluid in the hose.

Post back w/ what you find.
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[ET HUGEN]

Thanks all very much !