JD Feed Mill PTO Rpm

[Kjfred]

Bought and fixed up a John Deere 400 feed mill on an auction. It has the 1000 rpm yoke on the pto shaft, but everyone I talk to says they didn't know JD made those for 1000 pto.
Any guesses as to whether it is 1000 or if someone just put a different yoke on and ran the tractor slower?
Seems to grind ok with an adapter at 540, just not as fine a grind as I'm used to

 

[Banjo]

IDK, but I would think the fineness of the grind would be in your screen size.....

 

[lavacarancher]

The one I had was 540 RPM. Banjo is correct about the screen size effecting the fineness of the grind

 

[Kjfred]

I agree. Have also heard of guys running them slower to crack the corn more than grind it, just got me thinking is all. Thanks for the replies

 

[jkwilson]

Look online at the parts list and see if they offered two gearboxes. My bet is somebody changed the shaft.

 

[Son of Butch]

Bought and fixed up a John Deere 400 feed mill on an auction.
Any guesses as to whether it is 1000 or if someone just put a different yoke on and ran the tractor slower?

I believe you hit the nail on the head. We did that many years ago. It wasn't on a JD though... otherwise I'd say...
Hey I think you might have bought my old feed mill.