Denny, my books show that generator going on a late 50s early 60 IH crawler. Short step down Delco generator but 6 volt. Would have been 6 volt because the crawler would have had a pony start motor. So basically its the generator for the pony motor which would have been 6 volt. Once the pony was started it would have been engaged into the large motor to crank it. This was a typical set up on large motors. This would explain the yellow industrial paint.
Thanks
Ken
Classic Generator
www.classicgenerator.com