Hard to find Hydraulic experts

I had a so called expert in my community who was recommended twice to help out with my problem. He runs a mobile repair business out of his truck. I contacted him and I asked him to fix my 424 3PT because it goes to the full raised position on it's own with the position control down, and also to replace the cylinder seal. He replaced the cylinder seal he says but the lift problem is still there so I can't tell if the seal job was done. I'm waiting for the holiday season to be over to give him a call. So far I forked over 500$.

I suspect something wrong with the linkage
in the hydraulic housing. If anyone can come up with e-mails of bona fide experts, I'd appreciate it.

Secondly, many of the hydraulic problems that appear on here are not very well described. Your description is only average.

Last but not least, your tractor is European design. IH went outside the USA, to have tractors built for one reason, it was cheaper. They also got a cheap product. During my years farming I looked at the specs of many new tractors, and believe me you were just getting what you paid for, no more, no less. Those tractors were not Farmalls.

I went into detail on the posts I had requested for help in.

I'm serious. I think there is a lot of money to be made by helping out people in my position. That's good for the expert and good for the guy being helped, and that's no reflection on anyone who wants to make a bit of money. Some of these guys don't know the wealth of info they have but haven't clicked on the idea yet. I would even be willing to write up a nice "Hyrd Repair" web page for them for a small fee too.

It is my experience from the problem I'm having that there is not too many people out there
who use the web to help out in the subject of hydraulics, well OK, in fairness to Farmall people I would have to say the IH NNN line of tractors as you are correct the Farmall seems to be a robust machine judging by the posts. I even tuned in on UK websites, the country where these things were made. You would think there would be hundreds of retired mechanics with computers who worked on these machines back in the 60's. That could be indicator also of it's reliability, as fewer repairs means less experience in repairs, whos to say. I searched out engineering specialists in hydraulics, as you would think even if it's not a IH, this symtom would be evident elsewhere on some other machine mobile or stationary. No such luck.

There is one such expert that has helped out most everyone on the MH board, he's a retired MH mechanic and has his own site, and charges nothing, I forget his name. He's "saved" a lot of people.

Thanks.

I experimented a bit and discovered that after the arms are full up, I pulled the position lever slowly back to lift and see what would happen. About a 3/4 of the way up, the engine starts to load which tells me the pressure release valve is bypassing oil.

So I can't figure what is wrong with it. Good think I have all ground driven implements as standby for my corn cultivation next spring. I was hoping to fall plow, but my 3pt skrewed up, that leaves spring plowing which is not the best option in the north country. I have a good 'ole wheeled 2 bottom horse plow I rebuilt that I almost sold. Good thing I didn't.

It is a 3-point hitch POSITION CONTROL valve, so there are no detents. The height of the hitch tracks the position of the control lever. There is just a heck of a lot of valves, check valves, springs, and linkages in the 3-point lift to achieve position control with the option of draft control. There are a heck of a lot of small holes and ports and valve spools that could be plugged up by a small piece of foreign matter, and there are quite a number of critical adjustments to the valves and the linkages that connect to the rockshaft to provide position feedback to the control system.

The draft lever is full forward or down, and of course the isolator valve is open, and the fast/slow valve is on fast.

My hunch is it's in the linkage somewhere. Well, one plus about this tractor is that it has 2 access holes to work in, so I guess it's going to be me to do the work and I'll have to chok up this bad dream to experience. Think I'll get that manual.

I have a 424 and like it a lot, and the lift has always worked well, so I can offer no repair advice.

The 3 point hydraulic valve linkage is VERY COMPLICATED, and I hope your "expert" has a factory shop manual before tearing into it.

If you do not have one, I have two. I bought one on ebay for something like ten bucks, and then found I already had a manual with some other IH books. If interested, email me. I would let it go for what I paid for it, plus mailing.