[AT] OT(?) Cub Cadet 1812 Hydro question

[Stephen Offiler]

OK, I am finally starting to see how these valves function.  Thanks
everybody for the description of the dump valves.  I guess I was
thrown off by the lack of a manual release button, plus their apparent
position in the hydraulic circuit (I say apparent because in
retrospect I may have traced it erroneously - hard to know what's
going on inside a block of steel).  So, SteveW, a problem here
regarding my ability to rebuild is that I've got a lathe but don't
have a TIG.  I once had some very modest TIG skills from a welding
class, but no way to practice, so they're probably gone.  I feel that
I am roaring towards a dent in the wallet for a new valve.

Steve O.

On Mon, Jun 1, 2009 at 1:53 PM, Steve W. <falcon at telenet.net> wrote:

> If they are the ones on top of the hydro they are PRVs for the charge
> pump. They are not very strong but they retain some pressure in the pump
> to keep it operating without cavitation. They do act as a check valve in
> that they don't allow the hydro fluid to return through them.
>
> If you have a lathe and a TIG they can be rebuilt. You need to cut some
> of the crimp off then remove the shell. To reinstall the shell you can
> do a couple things. One is to TIG a short collar onto the shell and
> crimp the shell back on. I have also cut the bottom of the valve enough
> that the original shell could just be roll crimped back on.
>
> --
> Steve Williams
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