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Subject: 1952 8n 3pt hydraulics failure

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Cole planert    Posted 06-10-2018 at 20:48:21 [URL] [DELETE]        [Reply] [Email]  
  • 1952 8n 3pt hydraulics failure
  • Hello looking for advice, I'm a new ford owner been around them most of my life as my father has one but I have not done any work on them... Was using a cherry picker and moving some cedar logs around. While doing this at one point hydraulics seemed to start pulsing or chattering. Adjusted lever and it went away..continued to use for a few more logs than I parked it. Next time I pulled out of garage I have no hydraulics move lever up and down and nothing no noise from pump. I can grab lift arms and move up and down with hardly any resistance....not sure what's going on, seal on cylinder under the seat or something u should check. Any and all advice welcome!!

    Frank (WNY)    Posted 06-12-2018 at 10:47:05 [URL] [DELETE]        [Reply] [Email]  
  • Re: 1952 8n 3pt hydraulics failure
  • Hi Cole, When I bought My 50 8N a few years ago I assumed that the previous owner had maintained the lift system fluids. I used the lift and noticed the pulsing and the pump got noisy under load. I took the lift cover off and the took out the PTO shaft and dropped the pump. there was about an inch of sludge in the bottom. After taking the pump apart and cleaning it with mineral spirits, and then cleaning out the rest of the sludge from the differential and transmission for about a week, I used diesel fuel to rinse out the rest and put it back together. The lift works flawlessly now. Listen to Tim Daley and the others, read the manuals and how to's on reworking the lift system and understand how it works, and everything will be fine.

    Frank

    Tim Daley(MI)    Posted 06-11-2018 at 04:21:46 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 1952 8n 3pt hydraulics failure
  • OK, I have to ask because sometimes it is the simple, most obvious things that get overlooked. Is the PTO Lever Engaged? Is the oil level up? Is the oil water contaminated? There is a gasket on the top cover that you sit over, BUT that isn't the problem. Your hydraulic cylinder has either three steel rings OR a rubber O-Ring as 'seals' in the cylinder, and the latter uses a leather backup washer/wiper as well, depending on if it was ever switched over to the NAA style. The pulsating effect you describe is a sign the chambers are clogged and possibly the entire system needs a good cleaning and/or rebuild. Do the leaking cylinder test to determine if cylinder and piston are worn out. There is a pretty good chance the system was never serviced before, and if so, maybe a long time ago. Use this document as a reference guide -see LINK.

    Tim Daley(MI)

    Cole planert    Posted 06-11-2018 at 20:13:25 [URL] [DELETE]        [Reply] [Email]  
  • Re: 1952 8n 3pt hydraulics failure
  • We'll Tim.....it works and it was the obvious thing of PTO not engaged!! Wow idiot here. I was engaging and disengaging it and couldn't get it to work. I did sequence from the sheet and it worked. Well I feel great. Well you saved me there. Now I was standing on lift arms and running them up and down and they definitely chatter so how do I go about fixing that? Or something I should even mess with. Noticeable but not completely horrible. Thanks again guys for the help!!

    Tim Daley(MI)    Posted 06-12-2018 at 06:26:41 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 1952 8n 3pt hydraulics failure
  • Don't feel bad, many of us have done the similar thing. Also, the PTO cannot be engaged (or disengaged) unless the clutch pedal is depressed, then will not operate until the clutch is released. If system works well enough now, you can continue to do so but it will only get worse so plan on a system flush and possible rebuild of hydraulic pump to do it right. It's not a difficult task, just time consuming and you will want to get a helper. See my How To document and the I&T F-04 Manual has the procedure as well.

    Tim Daley(MI)

    Bruce (VA)    Posted 06-10-2018 at 20:57:34 [URL] [DELETE]        [Reply] [Email]  
  • Re: 1952 8n 3pt hydraulics failure
  • See tip # 16.

    Post back w/ what you observe.

    Cole    Posted 06-11-2018 at 21:12:51 [URL] [DELETE]        [Reply] [Email]  
  • Re: 1952 8n 3pt hydraulics failure
  • We'll I was a dummy and had to do a different sequence with PTO to make 3 point work. I was engaging and disengaging it while it was running and it wouldn't work. I engaged it turned tractor off back on and the thing worked great. Arms do chatter a big t going up tho..fluid is newer and very clean. Something I should address?

    Bruce (VA)    Posted 06-12-2018 at 11:40:17 [URL] [DELETE]        [Reply] [Email]  
  • Re: 1952 8n 3pt hydraulics failure
  • " Arms do chatter a big t going up tho"

    When the N lift is jerky coming up it means that one or more of the four pump cylinders is not pumping. It can be caused by broken springs in the pump chambers or a broken Scotch yoke in the pump that the pistons are attached to. Either one means the pump will need to be removed from the tractor to fix.

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