In Reply to: Re: Jubilee live pto posted by JamesNAla on February 27, 2017 at 18:08:28:
That is most likey the Sherman Live PTO add-on that uses a spring actuated clutch pack instead of the hydraulic actuation used on the Dearborn model 23-12. The pump for the Dearborn unit was driven off the proof meter drive on the engine mounted hydraulic pump on teh NAA and later tractors. The Sherman unit also worked on the N-series tractors and was billed as providing "live hydraulis" for the N-series in addition to "live PTO". The clutch in both designs was installed in place of the transmission to differential coupler and disconnected power flow to the differential/rear wheels without disconnecting the PTO.
Sherman Live PTO Clutch