Ford 5000 Lift issue after rebuild

[HUTCHAMUSPRIME]

Was having some weak/drifting on my Ford 5000 3 point. I was doing a lot of work on it and went ahead and pulled the top cover and replaced every seal on that lift cylinder cleaned everything I could clean and replaced both "filters" I also replaced the hydraulic pump (tramission drive type) and replaced all the seals/orings in the rear remotes. I also changed the tranny fluid and seals, no issues with that thiank God. I followed steps from multiple YouTube videos and my repair manuals. I'm not sure what I did wrong because now my lift does nothing. One of the old fragile seals around the brake rod blew out and replaced all 4 of those seals that went into the case. Forgive my improper terms I cannot remember them by name. I don't want to fill it back until I check with some other brains first. I did have help from a mechanic buddy of mine at the time. He thinks it's something simple but the tractor is now 2 hours away from him and he's down with covid for the next 2 weeks at least. My rear remotes are getting some flow to them I don't have a psi guage to check actual flow but it will shoot some fluid out. I feel like I've missed something stupid. Is there a priming step for the lift? Any input or knowledge is appreciated.

 

[oldnslo]

Our 5000 had an O-ring in a groove between the transmission housing and top cover that blew out which allowed all the oil to spray into the trans housing. This was the main oil passage to the valve stack on the trans cover. Did you replace that O-ring

This was located on right side of tractor as sitting on the seat.

 

[HUTCHAMUSPRIME]

Our 5000 had an O-ring in a groove between the transmission housing and top cover that blew out which allowed all the oil to spray into the trans housing. This was the main oil passage to the valve stack on the trans cover. Did you replace that O-ring

This was located on right side of tractor as sitting on the seat.

Hmmm. I assume I did but I don't not remember specifically and I'm not sure I know exactly which o ring this is tho. Do you another way to describe it?

 

[oldnslo]

Going From memory I had to move the complete top cover for the transmission housing which included the remote hydraulic valve stack, seat mount etc. it was a good sized casting. Once lifted off there was a hole in the transmission casting that was main hydraulic oil passage to the top cover and hydraulic valve stack. This hole had an O-ring groove machined around it.

We had the 1966 5000 & 1978 5600. I believe they were both made the same way.

 

[HUTCHAMUSPRIME]

Going From memory I had to move the complete top cover for the transmission housing which included the remote hydraulic valve stack, seat mount etc. it was a good sized casting. Once lifted off there was a hole in the transmission casting that was main hydraulic oil passage to the top cover and hydraulic valve stack. This hole had an O-ring groove machined around it.

We had the 1966 5000 & 1978 5600. I believe they were both made the same way.

On mine the hydraulic life cover is direct under the seat and then transmission cover Is a separate cover that both gear shifters go into. My rear remotes are mounted on the lift cylinder top cover. I do believe I replaced every o ring in that top cover.

 

[HUTCHAMUSPRIME]

Going From memory I had to move the complete top cover for the transmission housing which included the remote hydraulic valve stack, seat mount etc. it was a good sized casting. Once lifted off there was a hole in the transmission casting that was main hydraulic oil passage to the top cover and hydraulic valve stack. This hole had an O-ring groove machined around it.

We had the 1966 5000 & 1978 5600. I believe they were both made the same way.

Well after rereading, what you said thr oring was in the actual case? On the transmission side or the hydraulic side?

 

[oldnslo]

I just looked at Messick website and the parts diagram calls the assembly I am referring to the lift cover and shows the O-ring. This cover includes the 3 point hitch rock shaft. The O-ring goes into the transmission housing. This is really stretching the memory but I think on our 5000 with the the select-o-speed trans there was an inspection - access cover for the hydraulic pump on the right side under the right floor board. I think I ran the right rear tire up on 6 x6 or 8 x8 and removed that cover then could see the oil spraying out when trying to lift 3 point or operate rear remotes. My hearing was good enough back then that I could hear the oil spray which is why I started investigating.

 

[HUTCHAMUSPRIME]

I just looked at Messick website and the parts diagram calls the assembly I am referring to the lift cover and shows the O-ring. This cover includes the 3 point hitch rock shaft. The O-ring goes into the transmission housing. This is really stretching the memory but I think on our 5000 with the the select-o-speed trans there was an inspection - access cover for the hydraulic pump on the right side under the right floor board. I think I ran the right rear tire up on 6 x6 or 8 x8 and removed that cover then could see the oil spraying out when trying to lift 3 point or operate rear remotes. My hearing was good enough back then that I could hear the oil spray which is why I started investigating.

Can you send that link to messicks and I can reference the part numbers in the parts manual and see the proper diagram. I have the other transmission. 10 speed I believe. Has 2 shifters.

 

[oldnslo]

Attached is the parts diagram I was looking at. O-ring is item 5A located below the gasket bottom center of first page.

 

[HUTCHAMUSPRIME]

Attached is the parts diagram I was looking at. O-ring is item 5A on the first page.

Perfect. I'm sure that o ring was replaced . I'll listen out for some noise tho.
Thanks for helping out. If I don't find anything else I guess I'll pull that top cover again and visually check that oring what a shame it would be to be foiled by less than a dollars worth of runber.

 

[oldnslo]

A couple of possible silly questions.

are you sure the pump is turning? Drive gears are correct, etc..

what type of oil are you using?

 

[ovrszd]

Several years ago I rebuilt my 3910 lift. Like oldnslo my memory is foggy. I don't recall any problems priming the system. I was methodical about it all because I'd never tackled this before. I'll go back and relook this project in my shop manual and see if anything comes to mind. I agree with your mechanic. It's something simple. I seem to recall setting up the lift lever mechanism was a bit technical. Hoping it's a simple problem there. But it will still require the lift cover to come off. I used an engine hoist to handle mine.

 

[RickB]

A couple thoughts. Did you change the seal on the unload valve? Did the unload valve get reinstalled backwards? When stroking a remote valve without a cylinder connected can you hear the engine labor a bit when the pump deadheads and flow is forced over relief?

 

[HUTCHAMUSPRIME]

Several years ago I rebuilt my 3910 lift. Like oldnslo my memory is foggy. I don't recall any problems priming the system. I was methodical about it all because I'd never tackled this before. I'll go back and relook this project in my shop manual and see if anything comes to mind. I agree with your mechanic. It's something simple. I seem to recall setting up the lift lever mechanism was a bit technical. Hoping it's a simple problem there. But it will still require the lift cover to come off. I used an engine hoist to handle mine.

I used an engine lift as well last time lol. After a failed attempt to rig up a sort of major shift gantry lol! I think you're right. That top cover is gonna have to come back off and it kinda makes me want to vomit haha. Thats how it goes sometimes!

 

[HUTCHAMUSPRIME]

A couple thoughts. Did you change the seal on the unload valve? Did the unload valve get reinstalled backwards? When stroking a remote valve without a cylinder connected can you hear the engine labor a bit when the pump deadheads and flow is forced over relief?

I don't think it would have been installed backwards because I did pay pretty close attention to the diagrams from the parts manual. I'm pretty sure I changed the seal because I think I had to fabric a puller to get that bad boy out. I may be thinking of the wrong part tho. I'll check on the remotes again and get back with you.

 

[RickB]

I don't think it would have been installed backwards because I did pay pretty close attention to the diagrams from the parts manual. I'm pretty sure I changed the seal because I think I had to fabric a puller to get that bad boy out. I may be thinking of the wrong part tho. I'll check on the remotes again and get back with you.

If you had to make a puller, that's the unload valve. A stuck unload valve can cause the lift not to work at all without affecting the remotes.

 

[HUTCHAMUSPRIME]

Well fellas I made it worse we pulled thet cover back off. Realized that the flow control knob (I think) was seized and the actual piston was sorta seized up. So we tapped it out rehoned and lubed it. It was moving again and threw it all back together. It still isn't doing anything. With fluid in the cylinder it held the lift arms up but the controls didn't cause any changes. I think it may have lowered them down but that's it. Now my rear remotes aren't building any pressure either. I've been looking for a someone jn my area thay works on tractors of any kind with no luck yet. If I can't find anyone I'm gonna give it one more college try. I'll be sure to come back here with pics and videos. Also if anyone happens to know anyone who knows anything about these tractors in the Fairield County SC area. I've got some dollar bills with their name on it.
Thanks for all yalls help thus far!!

 

[RickB]

Call the service department at Comer Equipment in York, SC. They were a New Holland dealer up until a year or two ago. They may have a tech that speaks Ford. Or perhaps know someone in your area that does.

 

[HUTCHAMUSPRIME]

Well I'm embarrassed to say, this tractor has just sat. I got her cranked and running again. I'm go to take another Crack at it. Ive done some more research and I Think im going to direct my attention to the hydraulic pump first and make sure its actually primed and pumping.

 

[Mike1955]

Good luck man