Ford 1900 relief valve

davyjones · Mar 2, 2019

Hi, I was having some major problems with my hydraulics and I am starting by changing the fluid, clean filter, and going to check the relief valve. I've read if the relief valve is stuck this could be the problem. I removed the relief valve which doesn't really look like the one I see in the manual for the 1900 and the internal parts dont's really seem to match what it would look like in the big service manual. I'm uploading a couple of pictures of the relief valve I just took off. It looks like on the little plunger part there is a place for an o ring that is missing. I think one picture in the big book shows an o ring and it looks like it should go into that groove. Also again king of hard to tell from the book and what I actually have here, it may have been changed out and worked for the previous owner from a different model ford. Problems started last summer. Can anyone else tell if there are any other o rings or parts missing from the pictures?
I appreciate the help
David

JoeM(GA) · Mar 2, 2019

doesn't look like anythings missing from the parts page -
valve page

davyjones · Mar 2, 2019

(quoted from post at 08:18:50 03/02/19) doesn't look like anythings missing from the parts page -
valve page

Ok thanks I will put it back on and see what happens.

davyjones · Mar 3, 2019

Update for anyone else. I cleaned the relief/control valve pretty good and put it back together. I cleaned off the hydraulic screen/filter in diesel fuel per the recommendation and replaced the hydraulic/transmission fluid and it worked better than before. The back hoe bucket and front loader would drift as soon as you released them and now they stay up. They still creep though but instead of creeping as soon as you released pressure it now takes them hours (I can live with that) it probably took the bucket about 4 hours to go from 3' off the ground to the ground. No leakage that I can see on the garage floor after a day.

All my problems seemed to have started when I lent out my backhoe to my father in law who proceeded to add about 3 gallons of "hydraulic oil" he bought at probably auto zone. Not sure why he did that it was full and I told him not too it was not necessary.

My hydraulic screen/filter was a little iffy some parts of the screen seemed smashed a little but not ripped. On the safe side I am going to replace it and do another fluid change.

Ford 1900 relief valve

davyjones

New User

JoeM(GA)

Well-known Member

davyjones

New User

davyjones

New User

Similar threads