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Adding Rear PTO to a 620

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My 2nd 620 had no rear pto installed from factory. I'm interested in investigating retro fitting one to it. I searched the archives for some help on this but it seems that few have attempted this feat. What is necessary to do this? I've seen the parts listings for the "Rear PTO Kit" but that seems incomplete. While I haven't cracked open the transaxle yet to see the guts it's obvious that I'm missing the rear pto coupler assembly (I have just a plate), the shafts, drive hub and the clutch. I have an extra front pto clutch that I plan on using if possible. If no rear pto was installed when new am I also missing the transaxle gears (171124, 175150) and cap assembly (173878)? Sounds expensive and complicated but doable over time. Has anyone done this?

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With the setup time and trouble to install you'd most likely be better off buying the whole rear end and swapping it out into your tractor. You'll still need the shaft and clutch assembly to complete the pto.

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