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PTO question on John Deere tractors

5873 Views 2 Replies 3 Participants Last post by  jd110, 
K
I was wondering when John Deere changed the size of the PTO. I know that there is a 540 with 8 or so spines on it and than there is the 1000 with alot more spines. I have been told that John deere has different size PTO's in thickness when you get to bigger horserpowered tractor. For example...if I have a 4455(150 hp) that I hook up to my baler and I go and buy a tractor with 180+ hp that it will not hook up to the baler because the pto on the baler is too small to slip over the pto on the 180 hp tractor. Can anybody tell me if this is fact or fiction.

I haven't really looked into this much myself but I figured I would get some other peoples opinion on this matter.
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DRobinson
Kuca:

I have to go back a long way in my memory, but I believe that the 540 rpm shaft is six splines and 1 3/8" diameter. The 1000 rpm shaft is 21 splines and also 1 3/8" diameter. Higher horsepower tractors may have a larger diameter shaft to prevent using lighter, smaller equipment with the extra horsepower. One of the JD techs who are regularly on the forum will come in at some point and give you more updated information.
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J
It is true that larger JD's have a larger 1000 rpm shaft. It is 1 3/4" and 20 splines. But, it is not limited to JD. As far as I know, all makes use this larger shaft. It is because the larger horsepower tractors not only have the ability to twist the shafts, they also have the ability to damage the smaller equipment. The equipment designed to work with higher horsepower has the larger shaft to mate to the tractor. There are however, adapters available to convert down to smaller shaft as long as you understand the limitations.
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