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Re: Whats a ground speed P.T.O
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Posted by sotxbill on December 28, 2004 at 14:56:36 from (69.152.238.75):
In Reply to: Whats a ground speed P.T.O posted by 16535 on December 28, 2004 at 00:55:42:
some tractors actually have ground speed ptos.. that were BEHIND the trans and simply ran at rear axle speed.. meaning they only turned when the rear wheels turned and did not change speed base on gears or rpm directly.. only on the turning of the rear wheels.. so the faster the wheels turned the faster the pto turned.. this is a GROUND SPEED pto.. if the tractor has the clutch in.. but it still rolling, the pto will turn.. if the trans is in netrual and the tractor is rolling with the engine cut off.. the pto will still turn on a ground speed pto..as its tied to the rear axles or output side of the trans.. so if the wheels turn, the pto turns... MOST tractors have a pto that runs on input shaft of the transmission.. meaning that as long as the clutch was disengaged,, the pto would turn and its speed was based on engine rpms.. no matter which gear you picked,, even if you were in netrual.. as long as the clutch was out.. you have pto running... the tachometer showed a mark to run the pto at 540 rpms.. this is the most common type of pto.. but when you push the clutch in to shift, the pto stopped.. something you would not want to happen if your baleing hay,, if the hay gets thicker, you need to slow the tractor down, so you would gear down and both the above were not desireable.. hth.. bill
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