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Tractor Talk Discussion Forum

dependent PTO

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Winston Edmisto

11-07-2005 12:28:36




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I am looking at buying a Ford 850 with a bush-hog. My research states that the Ford 850 has a "dependent PTO". Is that the same as a non-PTO? What does "dependent PTO" mean?
I understand that the bush-hog with a non-PTO tractor will cause the tractor to continue to move forward when clutch is disengaged due to the momentum of the blades still moving. I appreciate any info anyone may have.
Thanks

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paul

11-07-2005 21:22:28




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 Re: dependent PTO in reply to Winston Edmiston, 11-07-2005 12:28:36  
I've never heard the terms you are using either, but you basically have the right idea - a Ford 850 does not have a live pto, but a transmission pto, and will need an over-riding-coupler to poerate safely with a heavy load like a brush hog.

I think you mean a non-live pto?

And dependent pto is a new one, but I imgine the opposite of independent?

--->Paul



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Mike (WA)

11-07-2005 16:53:54




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 Re: dependent PTO in reply to Winston Edmiston, 11-07-2005 12:28:36  
Never heard the term "dependent" PTO, unless maybe it means the opposite of "independent" PTO. Non-PTO is another new one. Here's a quickie explanation of terms-
1. Non-Live or Transmission driven PTO is what your Ford 850 has. PTO is driven off the transmission, so when you press in the clutch, both forward motion and the PTO stop. Except, if you are using an implement with inertia in the revolving part (bush-hog), that inertia of the turning blade will push the tractor forward even after you depress the clutch- into the fence, the side of the garage, well, you get the picture. Solution is an overruning clutch on the PTO shaft, as outlined in other posts.
2. Live PTO- Uses a two stage clutch- halfway down stops forward motion of tractor, all the way down stops PTO. So you can stop the tractor, without stopping the PTO. This is very useful in baling or combining, especially- so you can stop or slow the tractor when the machine starts to clog up, but keep the baler running to clear itself. 3. Independent PTO- operates by a separate lever, completely independent of the clutch. This is the best of all- just put PTO in and out of gear whenever you want. This is why the early Olivers and Cockshutts were the best tractors ever. IMHO.

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evielboweviel

11-07-2005 14:16:33




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 Re: dependent PTO in reply to Winston Edmiston, 11-07-2005 12:28:36  
your termonalogy is off alittle bit You are right about this tractor will keep on moving forward once the clutch is pushed in until the mower stops. An overrunning pto adaptor would make it a lot safer to use. Better would be to look for a tractor with live pto or independent pto such as Oliver S55, 550, MF 35,50 with two stage clutch. OR one of the Fords, Internationals,AC's or JD's with this option.
Good luck Ron

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old

11-07-2005 13:30:02




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 Re: dependent PTO in reply to Winston Edmiston, 11-07-2005 12:28:36  
Don't really know what your saying as far as non PTO. But that tractor will have a non-live PTO and you will need an over-running clutch on it to be safe.



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Dave_Id

11-07-2005 13:02:12




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 Re: dependent PTO in reply to Winston Edmiston, 11-07-2005 12:28:36  
When you disengage the clutch, the mower is also disengaged



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steveormary

11-07-2005 20:44:20




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 Re: dependent PTO in reply to Dave_Id, 11-07-2005 13:02:12  
The 850 should have plenty of power to run a 6ft. bush hog. You will need an ORC. I had a 5ft.bush hog on a tractor without live pto. With the ORC it worked great. Makes manuvering and shifting gears easy.

steveormary



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