m pto speed

Anonymous-0

Well-known Member
I put my 1946 M on a 10"x71' auger yesterday to put beans in the bin. I was curious how it would handle it. It did pretty good but seemed to turn pretty fast. What RPM do you get 540 on the pto?
 
you should have 540 rpm with the rated engine speed. should be able to find the sweet spot without running tractor at w.o. trottle.
 
It depends on how the governor is set - after 50+ years who knows how many people have messed with the max RPM setting!

Under a good load, full throttle should give 540. Since the auger isn't that much of a load you should be able to cut back a bit.

Get a hand-held tach if you want to be sure.
 
Trying to remeber old M speed- governor was 1600/1650 full trottle and PTO would do the 525/560 range for nominal 540. Variations exist- 1450 governor setting on earliest, Super M with 1750/1800 governor had matching PTO gears- if your M was every rebuilt the later governor weights and springs may have been installed. Industrial 2000 rpm governor parts also exist and are sometimes installed- Don't think they had PTO gear ratio the same as standard but many Industrials didn't have PTO- had extra hydraulic pump instead. If you have a tach on M, check the 1450 setting first under light load, otherwise get set throttle 2 notches back from full and see how it works. RN
 
where did you ever come up with the idea that a super m runs hundreds of rpms faster than a m ? the high idle for a m is 1595 and for a super m is 1600.
 

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