ken wrote on Friday, January 31, 2014 (PST): I'm guessing it's a Live PTO set up. G Brown wrote on Monday, February 03, 2014 (PST): Firstly UB's were not made until 1955. It is a live pto setup which came out for the U series in 1950. Was an option. D Clark wrote on Wednesday, February 05, 2014 (PST): Tractor Data says UB 's came out in 53 mike porter wrote on Wednesday, February 05, 2014 (PST): m-m used the behlen style "live pto" which "broke" the rear end to allow stopping while continuing pto operation. we have a massey harris 44 which has a pto clutch. m&w offered a pto clutch kit for h's and m's, as did behlen. if they work, they're great, our's slipped so bad we pinned it out to be able to use the tractor. Tony in SD wrote on Sunday, February 16, 2014 (PST): Its an add on to give you live PTO. You pull the lever and it disengages one drive wheel. The forward or rearward motion stops but the PTO keeps going

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