Birchhatchery
Silver Member
i have a ford 8n i turn the pto on with tractor in nuetral and the 3 point will lift the brush hog right up but as soon as i press in the clutch the 3point will drop it right to the ground how do i fix this problem?
1950 Ford 8n hydrolic problem
- Thread starter Birchhatchery
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whodat526
Veteran Member
sounds like the orings on the lift cylinder is gone you must remove the lift top to fix
OP
Birchhatchery
Silver Member
how do i do that
LD1
Epic Contributor
You have to take the seat off, and then remove the cover that the seat was bolted to. This is the rear axle top cover and it has the 3PH rockers arms coming out of it. The cylinder that needs fixed is on the underside of that top cover.
OP
Birchhatchery
Silver Member
does anyone no of of a walkthrough with pictures or website were i can see how to do it?
LD1
Epic Contributor
I am not sure if it is covered in the IT manual, but I think it is. Either way, with owning an 8N and wanting to do your own wrenching, it is a worthwhile investment. IT part # FO-4
Ford and Fordson Tractor FO-4 8N IT After Market Shop Repair Manual
Ford and Fordson Tractor FO-4 8N IT After Market Shop Repair Manual
OP
Birchhatchery
Silver Member
what happens if the i let it go cuz it lifts just fine so i can get off the tractor and move my snow blade
LD1
Epic Contributor
Nothing really, but it wont get any better. If it hasnt ever been rebuilt, it probabally has the metal rings. The new style uses a different piston and an o-ring. Costs under $100 IIRC, and is pretty easy to do. All ya gotta do is pull that top cover off and the cylinder is right there. If you are mechanically inclined at all, once the top-cover is off, it is pretty self-explainatory.:thumbsup:
There are several reasons why you might want to "consider" fixing it. None of them are mecanically related, rather convience. Here are some examples:
If you have a mower or cutter, and are transporting it, or crossing a ditch, or driving over something you dont want mowed, with a new pistion and seal, you can raise it and turn the PTO off and it will REMAIN raised without the blades spinning.
Or if you have a post hole digger and are digging some holes out in the field, you dont have to leave the auger spinning while it is raised and tangling up grass as you go to the next hole.
You get the idea. None of these may apply to you. But it sure would be nice if it were working properly.
There are several reasons why you might want to "consider" fixing it. None of them are mecanically related, rather convience. Here are some examples:
If you have a mower or cutter, and are transporting it, or crossing a ditch, or driving over something you dont want mowed, with a new pistion and seal, you can raise it and turn the PTO off and it will REMAIN raised without the blades spinning.
Or if you have a post hole digger and are digging some holes out in the field, you dont have to leave the auger spinning while it is raised and tangling up grass as you go to the next hole.
You get the idea. None of these may apply to you. But it sure would be nice if it were working properly.
OP
Birchhatchery
Silver Member
i have a shop manual for a 8n tractor what part is it exactly called that i am replacing to fix this problem?
Jerry/MT
Elite Member
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The lift cylinder is leaking or the stand pipe to the top of the cover is. Pull the right side cover and try to lift something with it look up at the lift cylinder using a flashlight to illuminate.(DO NOT UNDER ANY CIRCUMSTANCES STICK YOUR HANDS INTO THE HYDRAULIC COMPARTMENT WITH THE ENGINE RUNNING!) If you see fluid running from the lift cylinder. You've found your problem.
Get a FO-4 manual and it will tell you how to fix it. You need to remove the external feedback linkage from the top link connection before you try to remove the lift cover.
LD1
Epic Contributor
The hydraulic lift piston and seal/o-ring.
You might want to call a ford dealer to see how much it would cost you to have them just do it. I am reluctant to assist any further because I dont want to give you false confidence that you can do something your not able to. I dont want you to mess something up because you arent comfortable doing it but we convinced you anyway, and then nothing work properly.
If you have the manual, that is a good start. If you have the FO-4 manual, that is even better. And there are exploded parts diagrams in messicks website that shows every detail and every part. 8N FORD 4 CYL AG TRACTOR (1/47-12/52) Between those three things, if you cannot figure out how to change the piston, take it to a dealer.
OP
Birchhatchery
Silver Member
so do i need to take it to a ford tractor dealer or any dealer?
LD1
Epic Contributor
A ford dealer is probabally your best bet.
