Farm Equipment - Allis chalmers B running weird

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Allis chalmers B running weird

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=211633
Printed Date: 17 Sep 2026 at 4:02pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: Allis chalmers B running weird

Posted By: Ttague39B
Subject: Allis chalmers B running weird
Date Posted: 08 Jul 2026 at 7:41pm

I just finished putting back together my 39 B after painting just got it running tonight and the governor is now flipping the throttle open and shut when the throttle open but it sounds and run greats at low idle, its a different governor then what was on it originally because the other one we don't think was quite right when starting. Does anyone have a clue what we could do to fix this?

Replies:

Posted By: Ttague39B
Date Posted: 08 Jul 2026 at 7:42pm

Is there a way to post videos on this forum?

Posted By: steve(ill)
Date Posted: 08 Jul 2026 at 8:24pm

to set the governor.... open the throttle wide open.... there is an arm behind the radiator that goes from the governor right side to left side of the engine... pull the pin connecting that rod to the carburetor rod..... pull the carburetor rod wide open all the way toward the radiator... see that the "PIN" lines up to connect the governor rod to the carb rod... you might have to BEND one of the arms a little to get the right fit..

there might be a spring on the carburetor rod that is connected to an intake manofold bolt... that is an ANTI SURGE spring to keep the carb from hunting... The carb and governor have to be set EXACTLY RIGHT to eliminate that spring.. Normally that does not happen and the spring is the FIX.

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Like them all, but love the "B"s.

Posted By: steve(ill)
Date Posted: 08 Jul 2026 at 8:26pm

normally for a VIDEO, you attach a link to You Tube or similar... This site will allow PHOTOS to be posted.

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Like them all, but love the "B"s.

Posted By: steve(ill)
Date Posted: 08 Jul 2026 at 8:38pm

this might give you an idea............. look about the 1:20 mark..

https://www.youtube.com/watch?v=4GUfFOiZ_0E" rel="nofollow - https://www.youtube.com/watch?v=4GUfFOiZ_0E

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Like them all, but love the "B"s.