If it is a loadmaster, you should have a SM420. As for your PTO seals, most likely there will be little known about the particular model. Seals can be sourced by determining the type of seal lip needed, the outside diameter of the shafts and inside diameter of the housing.


1941 Chevy 1 1/2-ton WW2 4x4 dump truck
In the Stovebolt Gallery
Lots more pictures