The center pulley doesn't move back and forth, but the center divider
(sheave ) on it moves up and down as the belt tension is tightened and
released, this allows the belts to ride higher or deeper in the 2
grooves of the pulley, which gives much of the speed variations..
Trevor Boicey wrote:
>
> There is that center pulley, but from what I can tell, it doesn't
> seem to move. But it's hard to tell through the inspection holes, all
> I can do is feel it with my fingers, I can't see it.
>
> From what I can tell from peering into the inspection holes, the way
> it works is that the speed lever controls how far "up" the brake pedal
> can go. The brake pedal is connected to the back-most pulley.
>
> When the speed lever is in parking brake position (zero), it's
> pushing the brake pedal. With the brake pedal down, the brake is
> engaged and also the pulley assembly is slack.
>
> As you shift into the first low speeds, the pedal comes up, a big
> pulley right between your legs moves backwards, and tensions the belt,
> and you move forward.
>
> The more you shift into higher speeds, the more that pulley moves,
> the more the belt gets tensioned, and the more it climbs up the
> variable speed pulley and makes the tranny go faster. (the variable
> speed pulley is on the carriage but actually runs another belt that
> goes to the tranny)
>
> So if I shift into 7th (top) speed, and release the pedal, it
> doesn't come up that far and I move slowly. But if I pull the pedal up
> with my toe, the speed picks up to normal.
>
> The pedal pressure seems normal enough, so I am wondering if new
> belts will help. I just picked up the new belts, and might as well
> put them on anyways, but the only way I can see it working is if the
> grippier rubber is more eager to climb up the variable speed pulley.
>
> Part of the reason this is a problem is that this is at my cottage
> and I'm only there on weekends, but the parts dealers are near my
> house. So every weekend I go back with a new idea and some new parts,
> the grass gets longer. ;>
>
> Thanks all.
>
--
John
another one of them
*.?-!.* cub owners
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