Help IDing a valve / findnig rebuild components

[square1]

View from front of tractor. It's leaking out of the cap like projection on the right. I'm guessing that's the pressure adjustment


Side view. It's on a late 70's Ford 770 loader


Only identifying marks I can find.


It just started dripping, but the squeal has become more frequent during different stages of use. Additionally, the drip is right above the brake pedals, not an area I want a coated with hydro fluid.

It has 4 hoses top center and the In (closest to operator) / Out ports on the top at the outer edges.

Thanks for any help getting me pointed in the right direction for a repair / replacement,

 

[square1]

This does not bode well, 2 days, 200 views and not a hint of what valve it might be
Is there other info that, if provided, might help to identify it?

 

[LD1]

Most of them old valves, on fords and other industrial equipment is obsolete. And even if you could find one, the cost would be ridiculous. Most people will just retrofit a modern commodity valve in its place if there are serious issues.

That said, there are alot of o-rings or quad seals that the leak could be coming from. I have o-ring kits. So for me it would be just a matter of disassembling the suspect part, replacing o-rings, and putting everything back together.

That said, do any of these diagrams help New Holland (77A-SERIES) - FORD LOADER (1/83-12/88) Parts Diagrams

 

[square1]

Thanks LD1.
The parts diagrams you referenced has one that is very close, New Holland (77A-SERIES) - FORD LOADER (1/83-12/88) Parts Diagrams (021) - VALVE ASSY. 770A & 770B, the section missing from the diagram just happens to be where mine is leaking, of course
I did find a replacement on-line after posting this morning, but it's cost at $500+ is as you said, ridiculous.
I see some offerings form northern tool and others in the $200 range, just not sure if they're right re: flow, PSI, float, etc...or if they'll last (quality concerns). I guess I'll rip into it this weekend and see if I can replace o-rings etc.. and hope for the best. What's the worst that can happen (I sure hope I don't regret asking that question )
Thanks again!

 

[wdchyd]

Should be a common oring or quad ring like LD1 said.....pull off that cap and spool you'll see it.....then time to visit local hyd shop to match seal


You may wanna clean and replace all seals while you are in there