Have you reviewed George Schreyer's page for the Shay?

http://www.girr.org/girr/tips/tips1/shay_tips.html#contacts

Perhaps there is something that will be of use to you.

Is this what you are looking for?

https://www.bachmanntrains.com/home-usa/dwg/dwgs/LARGE_SCALE_38-TON_2-TRUCK_SHAY.pdf

There is this on Youtube - https://www.youtube.com/watch?v=cs4OffdgEfA

I think you mean Slim Pickens.   

Don't know about the plow since it's always spring on my indoor railroad.   

I've had one for about seven years with no troubles.  The only "special" thing I did was follow the Bachmann Railtruck Tips > http://girr.org/girr/tips/tips8/bachmann_railtruck_tips.html < on George Schreyer's wonderful site regarding the Gearbox Fix.

Loco Bill

While it is not too active you might check out the Large Scale Central Technical Modeling forum at www.largescalecentral.com/forums/32/technical-modeling

Assuming this is the "Lynn" I found these using a Google search of "bachmann 2-4-2T lynn manual" -

Forum

Video

Hope this helps.

I'd also suggest that you check out the forums at Large Scale Central.  It is a much more active site and many of the members that used to be on My Large Scale have migrated there.


edited:  now redundant that Bill corrected his post.