Unload valve seal

[Andyraines]

Hello all,

Does anyone know where I can lay my hands on one of these? It's for a 1961 super major. Phoned my local CNH dealer (T H White Frome) who were unable to help and completely lost by the request.

Are they still made/ available?

Thanks

Andy

[Brian]

What do you mean by seal? Is it the "O" ring or the metal piston ring type. Should be the same as the '000nd series tractors.

[Grani]

The unloadingvalve works better without the O-ring. I've removed it from my own Super Major years ago and it has worked perfectly ever since.

[cwayne]

I also chose to leave the o-ring off. When I pulled the valve apart there was no o ring . I was able to purchase a new one from a New Holand-Ford dealer,but after reading Brians instructions in wiki I decided to leave it off,the o ring caused noticeable drag. I am sure without the wiki instructions I would have used the o ring and had a unsatisfactory outcome .
I did this same job on the Ford 600 several months prior to reading the wiki. The ITTmanual only says to replace the oring so I replaced . It had a little drag, at that time I thought it was good. However now it does not seem to unload in the top portion of the control lever. It continues to make a hydraulic noise and slightly loads the engine in the upper 1 1/2 inch of the control lever positions . Any thoughts on this problem with the Ford will be appreciated, thanks .