1978 John Deere 850 Project

[beenthere]

Thanks for the pics.. when you called those "spools" in one post "cylinders" and then "pistons", had me confused. Those spools are fitted to the body of control valve and why they only come as a unit and not stocked as separate parts.

Hope someone smarter than I can chime in... and help. Salvage yards may be the best place to explore. Or a machine shop that might be able to fabricate some parts like that cap key #2

 

[RDJD850]

Thanks for the pics.. when you called those "spools" in one post "cylinders" and then "pistons", had me confused. Those spools are fitted to the body of control valve and why they only come as a unit and not stocked as separate parts.

Hope someone smarter than I can chime in... and help. Salvage yards may be the best place to explore. Or a machine shop that might be able to fabricate some parts like that cap key #2

Thanks beenthere. I've got all of the parts I can find ordered. Is it possible to pull the spools out of the SCV and replace the o-rings, springs etc? If so, is it a job an amateur can tackle successfully?

 

[beenthere]

RDJD850

possible to pull the spools..

I'd encourage you to give it a try.. best way to find out and learn.

Have you looked hard for the Eaton 30922-DSC that you mentioned in your first post in this thread? That one was mentioned earlier by the OP as being a direct replacement and worked well for him.

Here is one listed at MobileValve.
Eaton 3922-DSC Mobile Valve

Maybe others, but you may have exhausted all those possibilities.

Good luck..