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Anonymous Poster

Power Take Off (PTO)

04/22/2009 10:56 AM

Hi

I am wondering is any agriculture tractor manufactures having dual direction rotation of PTO shaft. Meaning c/w and anti c/w. I have seen onlt one direction with different speed. The standard speeds are 540 and 1000 rpm. When i look in to teh john deer, it has the logic of reversing the PTO shaft to get different speeds with out oil spill. Have any one has more information on this.

Thanks.

Raghavan
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BigPete
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Join Date: May 2008
Location: Tweed Valley, Australia
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Good Answers: 7
#1

Re: Power Take Off (PTO)

04/22/2009 11:53 PM

I nremember Lanz Bulldog tractors in the 1950's had reversible PTO shafts. The reason was that these tractors could run in either direction, so they had gearboxes with equal ratios forward and reverse, and reversible PTO's in case it started the wrong way. They could be operated all day on the wrong rotation without any damage - they were quite a unique experience to operate.

Pete.

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jmstreet
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Join Date: Apr 2009
Posts: 2
#2
In reply to #1

Re: Power Take Off (PTO)

04/23/2009 10:16 AM

There was a Russian built tractor sold in the called Belearsa US ( don't think I spell that correctly) that has a pto that would run in either direction.
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BigPete
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Join Date: May 2008
Location: Tweed Valley, Australia
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Good Answers: 7
#5
In reply to #2

Re: Power Take Off (PTO)

04/23/2009 4:22 PM

Google Belarus Trtactors

Pete

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Ron
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Join Date: Dec 2005
Location: Wisconsin USA
Posts: 824
Good Answers: 37
#3

Re: Power Take Off (PTO)

04/23/2009 11:04 AM

PTOs on older tractors commonly carried a flat-belt pulley; they rotated in only one direction. Common practice was (and still is!!!) to give the belt a half-twist if opposite rotation is needed. You'd think that the two halves of the belt would wear each other out in no time, but that is not the case. I've seen a full twist used as a simple means of keeping the belt from flapping even when running in the same direction. See http://www.thresheree.org/Photos/2008/2008-046.jpg for evidence that they are still functional; nearest two belts are twisted, I believe. There are more belts at http://www.thresheree.org/Photos/2008/2008-012.jpg. This system continued into MUCH more recent times. If the shaft you have is splined and emerges from (typically) the differential housing, you may need to provide an external jackshaft or gearing to reverse the output. At least some tractors were available with both the (often side-mounted) pulleys and a shaft. The ones I've used ran both at the same time, but that may differ with brand and model. All had single direction rotation, only; none had dual speeds.

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Harmen Beskers
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Join Date: Nov 2007
Location: Winterswijk, Netherlands
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#4

Re: Power Take Off (PTO)

04/23/2009 12:09 PM

rear PTO's from tractors turn only in one direction. 540-750-1000Rpm. Some tractors have a drive speed dependant pto wich rotates oteherwise as soon as the tractor back's up.

Rear PTO turn's clockwise. Front PTO turn's clock or anti-clockwise (both options are build).

Little stick-on gearboxes are available to turn the direction iff needed.

Br, Harmen Beskers
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