Hydraulic Safety Valve Assembly TE20

Both valves are interchangeable - but no, there isn't much room to work, and a stubby spanner is essential, as is being triple jointed and having three hands.

I have heard that some people remove the lower transmission plate to ease access to the valve - but remember to disconnect the control arm fork before you lower the plate, otherwise you will break the control valve. You will of course also need to remove the PTO shaft.

The valve should 'break' (i.e. operate) at 2,200psi when on a test rig - any hydraulics shop ought to be able to help and test it.

Sometimes Ford 'N' safety valves were fitted in error, these 'break' at 1500psi, so the hydraulics don't work as well.

Hope this helps.

The system would not pick up weight, but showed no signs of leaks. I tried to pick up wt. as I observed through the inspection covers, before draining system. The oil that came out at draining, looked like carmel topping for Icecream. Hence, I really didn't have an objective as to my real problem when I started.

That is why I did what I did and thought I had better change the Relief Valve. My local Ferguson Outlet said that valve isn't made any more.

Thanks for your help. One of these days I would like to have your e-mail address so I could communicate with you directly.

Thanks, Ray

I hate posting my email address as the spam filters get clogged. Also it means I can choose what I reply to, and feel no pressure to respond; if you are having problems, so will others who don't have the courage to post - and by posting openly we can all benefit and enjoy these tractors.

Once you have it reassembled, take great care over the quadrant adjustment - it is incredibly sensitive, and makes a huge difference to the 3pt behaviour - I only discovered just how sensitive this thing is recently - huge respect to Harry Ferguson. Just a tip.

See my response on the thread below on ploughing - the link in there will take you to the right page for info on setting up the hydraulics.

Good luck.

Without looking myself, I took his word for it. Finally I crawled under the tractor to investigate and found he was trying to put pump up in housing backwards. The new relief valve WILL FIT. So, I don't have a problem.

This is as much my fault, if not more, than his. I should have looked at the problem myself. Sorry for all the hassle. Please forgive me.

I'll keep you posted.

Glad you found the cure, though!

Interesting about the early pump reflief valve settings being 1500 to 1900psi - I never knew that.

Good luck.

Checked several hydraulic shops today and they have no way of testing my valve for psi. So if I can't find a new valve I quess I will have to reinstall my old one and hope it is ok.

Will keep you informed.