ford 1700 hydraulic problems

[JC-jetro]

well, If you have no flow then the pressure gauge cannot register any pressure. re-read your original post. It is difficult to see you have "all hydraulic" assuming you have a loader. Now how about following questions,

1- When did your 3 point stopped working?
2- Do you have a loader? a diverter valve?
3- With the pressure relief assembly removed and a catch bucket under it then do you see flow?
4- if you have any hydraulics, then pump flow must gush out of it because that is the first restriction the pump flow would see.

Why don't you try to remove the relief device making sure to not lose the spring and the conical shaped poppet valve, turn the tractor on and verify pump flow.

I am about to be stomped here!!!

 

[Paulbunyan62]

Good morning. I do have a loader and that works perfectly fine. I had 3 point hydraulics Monday after I did a hydraulic filter clean and oil change now I have no movement at the hitch also I had no movement before the change so that’s why I checked and cleaned the filter and oil. Loader it still working. There a little flow at the relief valve opening that I will attach a picture of tractor was about 1/4 throttle you be the judge of gushing of not before there is flow. My question and my reason for posting Saturday was my valve setup and relief valve insides look totally different from any other I’ve saw. If you look back at a previous photo my relief valve is on the rear side of the 1/4” line for the power steering. Will attach picture of that as well thanks for your time.

 

[JC-jetro]

Paul, I am heading out and will be back looking at it tonight.

 

[JC-jetro]

Good morning. I do have a loader and that works perfectly fine. I had 3 point hydraulics Monday after I did a hydraulic filter clean and oil change now I have no movement at the hitch also I had no movement before the change so that’s why I checked and cleaned the filter and oil. Loader it still working. There a little flow at the relief valve opening that I will attach a picture of tractor was about 1/4 throttle you be the judge of gushing of not before there is flow. My question and my reason for posting Saturday was my valve setup and relief valve insides look totally different from any other I’ve saw. If you look back at a previous photo my relief valve is on the rear side of the 1/4” line for the power steering. Will attach picture of that as well thanks for your time.

Paul,

I am a bit stumped. I will go ahead and see if I see anything close to what you have in NH website, followings are some comment and observation.

1- There are tractors that have a double pump, single shaft hyd pump. Basically , one main shaft and two separate gear pumps in series. This is like what I have on my kubota. One pup exclusively works with power steering and next one Loader/3 point and any other aux hyd.
2-. I see only one pipe runs along the right side all the way relief device. I seriously doubt you have dual pump. Does your pump looks like below?

3- Above is a single shaft, single pump. This will go to a hyd block to be used for 3 point and any other aux hyd.
4- What looks different is your relief set up. There is nothing wrong with yours as poppet looks a bit different but serves the same purpose. What is the plug on the right side of where you took the plug out? I wondered if that is another relief device? have you ever taken that plug out? I would be very curious to see what is behind the right side plug.

I am really stomped as what could cause some flow coming out of relief but that even low flow does not come out of lift cylinder plugs,unless it is entirely going in the diffy. See the excess flow goes back to diffy when the desired height of 3 point is achieved. That is called Neutral position that is achieved by a feed back sensor pictured below. Have you messed with that ?

let me know. Give more pertinent about your 1700 to see if I can find some factory schematic about your hydraulic system.
the good thing is your pump is good as your loader works. something causes flow diversion for your 3 point.

JC,

 

[JC-jetro]

open the attached PDF, that is probably what you have. Can you verify that?

JC

 

[Paulbunyan62]

Good evening JC. Yes my pump is just a single pump like the one you have in the photos. And yes the relief valve is a little different setup as well also the plug on the right is another type of relief valve without the adjustment screw and that one had a washer and 3 shims in it. I took the apart this morning all it all looked fine I didn’t take pics of the insides of the plug on the right but I can if your interested. I have disconnected the feed back sensor and when disconnected it will move 1/2” backwards until it hits the lift arm when you push the control lever down as if to lower the hitch that’s the only movement it will make. I couldn’t get the pdf to load. But look back on some older post from this site an found an interesting one from 2014 where you had responded to a fellow named lawman17 about a similar problem I’m having where all his fluid dumped straight into the Diffy and I believe if I scan through that forum right his was the spool valve. I believe mine could be this as well as my fluid is being excessively dumped before making it to the lift head.
Post in thread 'Ford 1700 Hydraulic Question'
Ford 1700 Hydraulic Question

 

[JC-jetro]

Good Evening, Wow, that was a good find Paul, could not remember my posts, saying that I agree with what I said. I'm always looking at cause and effect and random chances. Go back and in your mind re-create what you have done step by step. I am just thinking out-loud here but it might be a piece of garbage or something got lose and went through the hyd after the filter install (such as kidney stone or a clogged artery) that found it's way in to the spool. I hate to dork with the spool unnecessarily but that's exactly what Lawnman17 did. Before I do anything with the spool I will take the lift cylinder and the cylinder head off. I would then turn the tractor on and keep cycling the lift arm all the while checking the hole that routes the oil to the lift cylinder just hoping to see if what potentially restricted the spool can be ejected out of the hyd piping and component.

Make sure the spring is in there and all the spool arms (making it up as I go) can move back and forth smoothly around the pivot points.

I will look at your response tomorrow night.

JC

 

[Bud2024]

I am a novice to the Ford 1700 four wheel drive tractor. I have spent two years working on the hydraulic system replacing seals and o-rings, cleaning filters and changing oil, all to little avail.

I did discover a missing spool and spring in the power steering priority control valve, so I removed it but still no lift on the 3 point hitch.

But today I read, or reread, these 47 threads. Threads 25, 30 and 31 could have my answers. I am away from my Ford 1700 now but will be united with it in a few weeks.

Irregardless, super thanks to JC-jetro, mellowrose and paulbunyan62.

Anyone with a spare power steering priority control valve?

davidcboone@gmail.com
David

 

[JC-jetro]

Will be glad to help if I can once you get back to your 1700.