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Farmall & IHC Tractors Discussion Board

Re: Max pto speed on MD


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Posted by ScottyHOMEy on May 09, 2011 at 15:22:39 from (70.105.225.36):

In Reply to: Max pto speed on MD posted by sflem849 on May 08, 2011 at 17:10:44:

General practice on the letter series is that the Max RPM shown on the serial plate is "no load," which is 110% of the rated speed under load. Whichever way works for you, multipy htat number by 8/9ths, divide by 11 and multiply back by ten . . . the number you arrive at is where you would check your PTO speed.

I've been known to go the other way around.

In the tight quarters at the front of the motor on my BN, it's hard to get a good reliable point to get a piece of reflective tape for the laser tach to tick and then see it.

I set the governor and idle on it measuring the speed of the PTO shaft. 595 or so at the shaft made for 1540 RPM, 200 or a whisker more on the shaft makes for 525 on the motor.


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