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

[Steve W.]

Stephen Offiler wrote:
> OK, it's not an antique farm tractor, guilty as charged.  It is a 1988
> Cub Cadet (MTD built, a.k.a. "Cub Cadet Corp.") and it is a Model
> 1812, which is built off the same tooling as a real IH Cub Cadet Model
> 782 or so I am told.  I know all about the "IHCubCadet" online forum,
> but nonetheless figured I'd start here on ATIS.  My goal is simply to
> repair this machine so I can make the call whether I want to keep it
> and mow with it, or sell it and buy a modern Zero-Turn-Radius mower.
> 
> The basic problem is a leak from the hydraulic system.  It was serious
> enough (say a quart every 15-30 minutes into the cake pan that I was
> forced to rig underneath the machine) that I parked it a couple years
> ago, and here I am today, living proof that occasionally you DO get
> that Round Tuit.
> 
> I've got the factory service manual, and it tells me I've got the
> Sundstrand hydrostatic transmission.  With the sheetmetal stripped
> from the steering wheel back, a good power-washing and running off a
> remote battery connected with jumper cables, I found the source of the
> leak, and mercifully it looks like something REALLY simple.  The pump
> has two check valves threaded right into the top, very easy to access
> with no further disassembly.  They are identical, and they each have a
> tiny vent hole centered in the top.  The leak comes from this vent
> hole.  The book says these valves cannot be serviced beyond
> replacement of the o-rings, and removal and inspection of the faulty
> valve shows that it is crimped together and cannot come apart, so I
> agree with the book.
> 
> My specific question is this:  if the check valve is leaking out the
> tiny vent-hole in the top, does that mean O-ring replacement, or do I
> need to chase down a whole new valve?
> 
> 
> Thanks and best regards,
> Steve O.
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> 
> 

Steve,
 Sorry to be the bearer of bad news but those valves are pressure relief
valves. Not possible to rebuild them. When they leak it means the
internal seal is bad. I have had some luck taking them apart and soaking
them in some cleaner.

Oh and if you have any other questions try

http://www.ihregistry.com/

We welcome ALL of the CC tractors from the originals on up to todays models.
Also have LOT'S of guys with spare parts and new parts as well.


-- 
Steve Williams