The "B" and "B" with brake PTOs came with two springs.
When you buy a new "rebuild kit" for a "B" or "B" type with brake the kit comes with two springs (and both should be used).
With the same style PTOs I have read where some used two disks although I don't remember ever seeing one in person.
Springs for these type PTOs can be purchased separately.
The "A" style PTO used only one spring, and because of the way it is made, I don't believe that two (springs) could be used.
It has been my experience that if the "A" springs get hot, they no longer "spring" and are useless. The "B" springs seem to be some better with regards to getting hot.
Oddly enough, I have never seen an "A" type springs available without buying a "kit".
If anyone knows if the "A" type springs are available I would greatly appreciate a heads up.
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