Cat 22 ring gear

Gary, this is what I used. The starter and ring gear came with the 22 when I bought the basket case. Having the engine out made is easy to design an adapter plate. Engine is still out so I haven't tried it yet.
Pete

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Thanks for the help. I have an original starter for a 22. I am hoping to find and original ring gear if possible for a machine I just bought. The other 22 I have has a modified starter assembly.

How much small is the NAPA ring gear? Is the pitch diameter correct for the Cat 22 starter? It seems you are saying an eccentric plate had to be made to match the starter to the ring gear. Is that correct? I'm not sure from the data given, but I think I would prefer to bore the ring gear and not mess with the flywheel. There's an awful lot of ring/pinion starters out there. I would keep looking if I was concerned with keeping as many parts stock as possible. Measure up the center-to-center distance required and work from there. And bear in mind that the 22 had about the easiest starting engine that ever was as I recall from long ago.