I've been trying for hours now to figure this one out...
I'm working on trying to cure a charge pump leak on my 149. The rear end serial tag codes it correctly as a 149 rear (2050047u417133) so I've got at least that going for me. My leak is coming from the gerotor charge pump housing so I ordered up a new O-ring, needle bearing, and lip seal and dove in.
I got everything torn apart and discovered that my rotor housing is actually 2 pieces. There's the part at the front that is shown in the exploded diagram where the o-ring lives but there is a
second plate behind it that seals to the transmission itself with what I can only describe as a plastic gasket/shim. This arrangement isn't shown on any exploded diagram I've found (Simplicity, Deere, Wheel Horse, other Cub Models, the Cub service manuals, the Danfoss 15U service manuals, etc, etc). I even watched a few videos of guys rebuilding 15Us and never saw a housing like mine. Naturally, since I can't find any trace of it's existence on Earth, the weirdo plastic gasket in mine has a tear in it...
In the attached picture you'll see from left to right, the "extra" plate, the plastic shim/gasket, and then the regular rotor housing that looks like everybody else's.
So... Anyone have any clues they can loan me here? I'd hate to just RTV that thing on, especially since that plastic part has a weird passage in it that none of the other parts do and I have no idea what job it is serving. I'd much rather just buy a new one.