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Pto Rpm's


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#1 Bud OFFLINE  

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Posted October 14, 2014 - 10:58 AM

I picked up a 41" flail mower for 16 hp tractors. I needed something different to try and keep down the weeds, thistles, and light brush around the barns and corrals. It's just to uneven for the standard mower deck. The problem is it runs of 540 rpm pto.  I hoped to find a Massey pto kit, but there just not out there. I also thought I could change the belt pully size, but that leaves a problem with too high a speed on the gear box (540 to 2000). the gear box is rated up to 40 hp but I don't think it would handle the speed increase. Maybe changing the gear box. It's appers to be a 1:3 (going from 540 to 1620 rpm) increase in the gear box itself. I would need to go to a 1:81 (going from 2000 to 1620 rpm). Any thoughts or ideas? thanks.IMGP2168.JPG IMGP2170.JPG



#2 js5020 ONLINE  

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Posted October 16, 2014 - 05:20 PM

Put a 6:1 gear reduction engine on it,, small engines run around 3600rpm and with the reducer you'll be around 600rpm, manipulate the pulley just a bit and you"ll be all set. I think carrol stream sells 6:1 engines up to 11 or 13 hp pretty reasonable.
  • Bud said thank you

#3 Bud OFFLINE  

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Posted January 02, 2015 - 03:43 PM

IMGP2285.JPG IMGP2286.JPG IMGP2287.JPG Back to the drawing board.  I thought I had my problem solved without going with an extra engine as js5020 suggested. It my be what I have to do.  I used a front mount pto unit from a John Deere 317 and made up a pto shaft. You guessed it. When I turned on the pto it spun it the wrong direction. I knew if I could find a right angle gearbox to be mindful of the rotaion but I didn't even think about the JD unit changing the rotation. Probably because it is a front mount instead of rear mount. A right angle gearbox with 1:.776 would be so easy.  I'm thinking of a gearbox like on the Masseys 1655's tiller would work. It's all part of the fun and fustration.  Here are some pic's. 


  • michael.kitko said thank you




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