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What RPM

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=154599
Printed Date: 23 Sep 2025 at 11:13pm
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Topic: What RPM
Posted By: TMiller/NC
Subject: What RPM
Date Posted: 06 Oct 2018 at 5:59pm
What rpm does a B pto turn.  Maybe a better question is at what engine setting does the pto run 540 rpm.  Thanks



Replies:
Posted By: DiyDave
Date Posted: 06 Oct 2018 at 6:16pm
A good guess would be at 1400-1500 engine rpm.  How do you tell the rpm? get a hand held, non contact tachometer.  You can rev the engine, till the pto gets up 540, then check what the engine revs are.... Not trying to be a smarta$$, just delivering info...Wink

https://www.harborfreight.com/digital-photo-sensor-tachometer-66632.html" rel="nofollow - https://www.harborfreight.com/digital-photo-sensor-tachometer-66632.html


Posted By: Dakota Dave
Date Posted: 06 Oct 2018 at 6:21pm
about 2 notches from the end.


Posted By: bigal121892
Date Posted: 06 Oct 2018 at 7:31pm
Just run it wide open, and call it close enough.



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