Ingersoll444,
It came off an old 140, which means it is at least compatible with my 1978 316. It will most likely fit the '84 316 I have too. It is in decent shape, all the bearings seem good and the housing is sound. I don't know if it is in better or worse condition than the other one, but the price was decent and I didn't have to drive to Mass. to get it. I might need to get new hammers for it as I have not had a chance to inspect them real close yet. It has been repainted sometime in the past, and there is evidence of some poorly sanded rust under the paint. Overall I'm satisfied with it as I did not buy it as a museum piece, but to put to work.
To all with the safety warnings to me,thank you all for reminding me that these machines are serious monsters capable of inflicting great injury. I have owned and operated a W. W. Grinder chipper/shredder since I bought it in around 1982. I have the ULTIMATE respect for what these machines can do. I ALWAYS wear gloves, high quality hearing protection (plugs AND muffs because these suckers are loud), safety goggles, and no loose clothing. I operate it for about 1/2 to 3/4 of an hour at a time and then take a break. It is not the kind of machine anyone should operate when they are tired, or had a couple of beers. I've operated a lot of dangerous machines in my life and these shredders are right up at #1, just above chain saws. At 47 years of age, I still have all 10 fingers and all 10 toes and I am very fond of ALL 20 of my digits. My dad's brother is very fond of his 19 1/2 and I have another uncle that is fond of his 19. Both started out with 20

I've seen what happens when people are in a hurry and get complacent. My high school sweetheart's dad lost his right arm in a corn picker the summer after graduation.
As to what is next on the wish list? I'm searching for the rear mounted trenching tool that Deere offered back in the day. Two different manufacturers built them over the years. Also looking for an affordable 3 point hitch to mount a Gannon Earthcavator on, if I can find one of those. Gotta get some ag tires and some more cast iron wheel weights so I can stack them up for the serious work these ground engaging attachments can do. The hunt continues.......