Posted by farmer boy on September 12, 2013 at 10:45:45 from (199.167.109.42):
In Reply to: Rated RPM vs Max RPM posted by Tx Jim on September 12, 2013 at 09:13:04:
Read it again. "966 rpm at 1900 engine rpm
diam 12" face 8-1/2" Belt speed 3035 fpm Power
take-off 1003 rpm at 1900 engine rpm."
The belt speed is 966 rpm at 1900rpm. The PTO speed is 1003rpm at 1900 rpm. Tractordata says that both 540 and 1000 PTO are acheived at 1900rpm. Nebraska confirms that without a doubt. Look up John Deere 4020 tachometer. The vast majority of the pictures show the PTO marking at around 1900rpm. Maybe some were made that did make 540 PTO rpm at 2200 engine rpm. Go back once again and take ANOTHER look at the Nebraska Test results. DIRECTLY below where it says 91.17hp at 2200rpm it
See the info in the Green circle? That's what you need to look at.
This is getting off the topic at hand. I can tell you without a doubt that if PTO speed is acheived at rated rpm, it's a coincidence. It may have been designed that way, but there's nothing(SAE or ASAE) that say they must be the same.
The picture is of the tachometer of a Kubota M6030. Rated engine rpm of 2400. PTO speed is 2000rpm.
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