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Re: Re: Re: Re: Live PTO
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Posted by paul on June 30, 2002 at 21:56:09 from (209.23.145.80):
In Reply to: Re: Re: Re: Live PTO posted by Gordon Butcher on June 30, 2002 at 18:51:59:
True live pto has it's own clutch, and can be turned on or off at any time, regardless if you are in a gear or out of gear, tranny clutch in or out - whatever. My IHC 300 & Oliver Super 77 have this. Ford came up with the double clutch which is called a live pto. It is sort of in between actually. You can push the clutch 1/2 way down & it stops the pto, or you can put the pto in gear. (It does not matter what gear the tractor is in, or neutral.) However to stop the tractor moving if in gear, or to shift gears you have to push the clutch all the way down, thus stopping the pto on the way. My Ford 960 has this. Tractors without live pto have only 1 clutch, and when you push it in, both the pto and any tranny gear is stopped. To shift either the pto or the tranny on/off you need to stop both. My Farmall H is like this. It also does not have live hydraulics. It is of course my loader tractor, and a real pain. I cannot raise the bucket with the clutch pushed in. So lots of shifting into neutral to adjust the bucket hieght... Non-live pto can come from the front of the tranny & run at 1 normal speed; They can come from behind the tranny & run faster or slower depending on what gear you are in; Or some tractors have both. So for example, when you are baling with a non-live pto and you come to a wad of hay too thick for the baler, you have to push in the clutch - and the pto stops also & the baler, probably plugging. Shift to neutral, get the baler rocked up to speed to clear the plug, then push in the clutch (slowing the baler) and quickly shift into gear & take off again, jerking the baler back to speed at the same time you jerk ahead. (Notice both the pto load & movement load are placed on the tractor at the same time.) With my IHC 300, I can drive up to the windrows in 4th gear, shift down to 1st with my left hand while putting the pto in gear with my right, and be baling without even coming to a complete stop. Any thick wads of hay, push in the clutch, the pto & baler keep running to clear things out, ride the clutch a bit, and the person on the rack hardly notices the slowdown.... Non-live pto tractors are also dangerous with big flywheel-type implements like brush hogs. Since the pto & the rear wheels are locked together, when you push in the clutch to running brush hog will keep the rear wheels moving - possibly for many feet! You need an Over Running Clutch to operate these types of loads safely on a non-live pto tractor. --->Paul
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