On Sun, Mar 17, 2002 at 12:35:51AM -0600, Elton Clark wrote:
>
> AFAIK, only on the Cub and maybe two semi-rare Japanese units. The 6
> spline
> 1 1/8" or 1 3/8" PTO running at approximately 540 rpm was a pretty
> universal
> standard for decades on all sizes of serious tractors. To lower the
> u-joint and driveline stress, a 1000 rpm standard was adopted in the
> sixties for larger tractors . . like 70 HP and up.
My '91 16hp Kubota has a two-speed PTO. 540 and 1000.
Evidently the Japanese use some 1000 rpm implements on their
compact tractors.
The chipper I bought expects 850 rpm! So I
run it on the 1000 rpm PTO at slightly less than full revs.
Eric
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