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

[Phil Auten]

Steve,
Since O-rings are pretty inexpensive, I would replace them both and
see what happens. Sounds like an easy and cheap fix, if it works.
If not, just proceed from there. Is there any more info in the manual
that might shed some light on other possibilities?

Phil

At 07:16 PM 5/31/2009, you 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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