Ford 4600 lift problem

daniel20vm · May 27, 2019

Hello. At the beginning I want to apologize for the spelling, but translators are translate google translate because I'm from another country.

I have bought a FORD 4600 tractor for a long time and I have a problem with plumbing from the very beginning

The oil and filter in the hydraulics was changed half a year ago (he worked 200 mtg), and the fact that the previous owner assured that recently when he used the lift (ie about 2 months ago) everything was ok.

I noticed that under load when the lift lifts up everything is ok (floats smoothly, does not tug) but when it reaches the required height, it gradually descends and raises again. As a result, raising and lowering the tractor trembles so that it can not withstand it. What could be the reason? I will add that the tractor is equipped with a front loader that goes flawlessly .... (for those who do not know I'll add that this tractor has a lever under the seat to change the hydraulics (works or jack or turn)). I also know that the tractor has the regulation of the pace of the hydraulic pump, but if I did not set it all the time the front loader works without changes (it's ok) and the lift bounces ...

The oil condition when I check on the dipstick is ok (the tractor has the one behind the rear left axle).

I read was similar when the oil filter was changeable (but then they wrote nothing about the front loader) and in my case it was changed six months ago. Others wrote that in the manifold the valve was stuck (I think it's No. 27A or 24 in the picture No. 3). Still others that the manifold under the seat has been damaged (hydraulic switch for lift or turn).

I am surprised that the front loader works properly, and the lift tugs ... If the filter (No. 71 in picture 3) was to blame, would it be possible for the front loader to work properly and the lift tugged?

My lift is behaving all the time like on this movie from 2: 10sec

Ford Golden Jubilee Lift Issues - YouTube

What can cause the lift to tear?

1. The interior of the tractor (from white plastic comes the lever to change tur / jack)
2. I have such a hydraulic distributor (except that I have a working pace in the cabin) (photo borrowed from the Internet)
3. Diagram of hydraulics and distributor (photo borrowed from the Internet)

Seven Gables · May 27, 2019

My best guess is your internal cylinder/ram needs new piston seals. It's leaking bye then your position control tells it to go back up over and over. Just a guess though. Good luck with it. B

fritz423b · May 27, 2019

Seven Gables said:
My best guess is your internal cylinder/ram needs new piston seals. It's leaking bye then your position control tells it to go back up over and over. Just a guess though. Good luck with it. B

This sounds right. I had a similar problem with hydraulic filter clog but everything was affected, three point, front loader and steering.

daniel20vm · May 28, 2019

To get to the cylinder I have to take off the cabin? Can you unscrew the floor in the cabin? I have the type of cabin Q

I'm sorry to ask you a question, but I can not do it myself in the tractor because I'm not at home ...

Can he be guilty of valve 27A?

Seven Gables · May 28, 2019

I don't think you have to take cab off. By memory 30 yrs ago, you have to access it by taking the heavy cast top off the rear axle, first remove the seat. All linkages and hyd lines need to be removed that prevent removal. Cab probably makes more difficult. My old 3400 ford is the tractor I was into, no cab but similar. I'd make quite sure you think that's the problem before doing, quite a job to do especially with a cab. Might of been closer to 40 yrs ago. B

daniel20vm · May 28, 2019

I have one more question. I thought about these cylinder o-rings, but it seems to me that if they were damaged (ie leaky and lost pressure) then after lifting the lift and turning off the tractor, the jack would drop down. In my tractor, the lifter with the connected machine when the tractor is raised and turned off, the lift does not fall down .... So it seems to me that it means that the o-rings are not broken ...

Well, unless it's wrong?

Can he be guilty of valve 27A?

Seven Gables · May 28, 2019

Yes I would have to agree if the 3pt arms stay up maybe settle slowly over time with a load this is normal and your seals are most likely ok. What have you got mounted and trying to lift? If it's a back blade or anything that is used above ground you should be using the position control lever which is the outer most one. The inner lever is your draft control and is used for soil engaging implements such as a plow or subsoiler tooth, it maintains a selected draft load on your soil engaged tool. Maybe you know this? For just lifting and no need for draft control leave the inner draft control lever all the way down and only use the outer position control lever. Just want to make sure this isn't the trouble. B

daniel20vm · May 29, 2019

Yes, I know what you're talking about with these levers. But he does the same on both levers (trembles). I even tried to move and tinker two at the same time. If I did not combine, I always tremble ...

I will say one more thing that I noticed. When I clip the machine I lift the jack up and when it starts to tread I turn off the tractor, the machine drops down immediately

But when I clip the machine, I lift it up and when it starts to shake it will change the hydraulics to front lader (with the lever from the first photo that comes out of white plastic) and then turn off the tractor (with the hydraulics set to front lader) the machine does not fall ....

Do you suspect something else after what I wrote?
I think 99% is a valve, but which one? 27A? Or maybe the hydraulic switch has been damaged and is he responsible for that?

Please help because I do not have strength anymore

showcattle · May 29, 2019

Seven Gables said:
For just lifting and no need for draft control leave the inner draft control lever all the way down and only use the outer position control lever. Just want to make sure this isn't the trouble. B

I would check this out. Inner lever should be all the way down, use outer lever to raise and lower.

daniel20vm · May 29, 2019

As I wrote above - I tried the inner one down and raised the outer one and trembled. I tried the opposite - it also trembles. I even tried to lift both, and it trembles ....

That's why I suspect it's a valve, as I wrote above. Any ideas?

Seven Gables · May 29, 2019

I guess ar this point I would pull your selector valve and flow control valve, one at a time and carefully take them apart and look for any worn seals, weak or broken springs, hairline cracks in body or build up of sludge/dirt. I've never had either one apart so I'm not real familiar with the tear down. Does the flow control (F-S) rotate freely? Also the selector valve, is it getting full movement when you switch from loader to 3pt hitch? One other thing, do the position and draft levers move freely and independent of each other? B

daniel20vm · May 30, 2019

The flow control valve adjusts smoothly, the change valve also changes well. The levers also work smoothly, at first glance everything works very well.

Where to start checking springs / o-rings? from the valve under the seat or from the distributor whose diagram I added in the picture (in the picture in the lower right corner)

Seven Gables · May 30, 2019

Good question, was hoping for simple fix. I've owned a few ford tractors but none set up with that selector valve. All of that vintage did have the flow control (f-s), never had any problems with it so kinda blind to their workings. You might pull the 25 and 21 plugs on the flow control and have a look at the Springs , plungers, orings and also just to see if everything is clean. Same with selector valve. Maybe somebody with more knowledge or has had this same issue will chime in. One other question, what is the little blue lever in first pic under seat? Never had that on any of my fords either. The next time I'm at my new holland dealer I'll ask one of the mechanics their opinion of your issue. B

daniel20vm · May 31, 2019

The small blue lever in the first picture is from this distributor to reduce / increase the efficiency of the hydraulic pump (I just have it in the cabin and some have it like in the photo number 2 directly on the manifold).

Tomorrow I will try to undress number 25 and 21 and see if this is something ...

Ask how you can deal with this New Holland dealer about my case - you can help me ....

Seven Gables · May 31, 2019

Ok now I think I understand the blue lever goes to the flow control on your tractor . Does the flow control that the lever goes to look to be the same as the flow control in pic 2? I've never seen one that way. And yes I will talk to my mechanic at dealer to see what his thoughts are. Is there a new holland/ford dealer in Poland? Near you?B

daniel20vm · Jun 3, 2019

Yes, you think - it's a flow control lever. This is the lever that is on photo 2.

I have no New Holland / Ford dealer in my area; (

It would be very nice to me if you asked a dealer about my problem - he could help me fix the fault.

Looking through the diagrams I also found one valve that can cause my problem is the valve n 22 of the photo which he adds in the attachment. What do you think ? The question whether to get to it just unscrew the selector, do you need to raise the entire elevator cover?

Seven Gables · Jun 3, 2019

Pic #2 is a flow control valve, my ford tractors all have this exact same flow control valve. I don't know what the small lever in your first pic is, do you know? What does it go to on the other side of shroud? To get to #22 I think you have to remove heavy top off rear axle. Yes I will ask my dealer mechanic the next time I'm there, I've been extremely busy, can't get out of the field. B