I believe there is on the Bachmann site
https://www.bachmanntrains.com/home-usa/dwg/dwgs/LARGE_SCALE_38-TON_2-TRUCK_SHAY.pdf
It's the 38 but not sure what's different.
https://www.bachmanntrains.com/home-usa/dwg/dwgs/LARGE_SCALE_38-TON_2-TRUCK_SHAY.pdf
It's the 38 but not sure what's different.