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1939 B governor

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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=128596
Printed Date: 29 Dec 2025 at 12:14pm
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Topic: 1939 B governor
Posted By: nella(Pa)
Subject: 1939 B governor
Date Posted: 10 Sep 2016 at 2:18pm
Tractor S.  #16410
Engine S.   #BE16532G
When I advance the throttle leaver the engine rpm dose not increase, it stays at an idle. I followed the linkage to the governor and the manual control lever is loose on the shaft that goes down into the governor. Is it suppose to be fastened to the shaft to make the shaft  rotate as the throttle is advanced? How would be fastened on the shaft, press fit or roll pin.
Thanks,  Nella



Replies:
Posted By: Dick L
Date Posted: 10 Sep 2016 at 3:03pm


Posted By: nella(Pa)
Date Posted: 11 Sep 2016 at 9:02am
Good Morning Dick L,
The manual control lever(banana shaped lever with spring at one end) has no oil line going into the shaft like in the picture, I think mine is an earlier model. Also, the end for the spring is bent upwards and the spring is on the top. The manual control lever is not fixed to the shaft that goes down into the governor, it just rotates on the shaft and I think it should have a press fit or a roll pin in it so when you advance the throttle it should turn the shaft to open the butterfly in the carburetor. I have the control lever off and wire brushed all the paint off and there is no sign of a hole or a pin in it. The motor just stays at an idle when you advance the throttle.

Any and all help appreciated,  Nella                                                           


Posted By: Dick L
Date Posted: 11 Sep 2016 at 9:37am
Originally posted by nella(Pa) nella(Pa) wrote:

Good Morning Dick L,
The manual control lever(banana shaped lever with spring at one end) has no oil line going into the shaft like in the picture, I think mine is an earlier model. Also, the end for the spring is bent upwards and the spring is on the top. The manual control lever is not fixed to the shaft that goes down into the governor, it just rotates on the shaft and I think it should have a press fit or a roll pin in it so when you advance the throttle it should turn the shaft to open the butterfly in the carburetor. I have the control lever off and wire brushed all the paint off and there is no sign of a hole or a pin in it. The motor just stays at an idle when you advance the throttle.

Any and all help appreciated,  Nella                                                           

You ca see in the picture that it is welded fast. The 1938 and 39 did not have the oil line. Just a solid pin for it to rotate on. Not having the oil line will not be a problem.   If you can not see were the weld broke loose to weld it back in the exact place you most likely would best to get a different cover that was not broke.


Posted By: nella(Pa)
Date Posted: 11 Sep 2016 at 11:04am
Hello Dick L,
The weld is not broken and yet when I advance the throttle lever the engine stays at an idle. If I move the rod that goes past the fan forward the engine will rev up. All the joints are free, nothing rusted fast but the gas lever doesn't work. It worker about 3 yrs ago when I used it last pulling a 6' bush hog. Might something be stuck inside of the governor.
Thanks, Nella


Posted By: Dick L
Date Posted: 11 Sep 2016 at 12:45pm
Originally posted by nella(Pa) nella(Pa) wrote:

Hello Dick L,
The weld is not broken and yet when I advance the throttle lever the engine stays at an idle. If I move the rod that goes past the fan forward the engine will rev up. All the joints are free, nothing rusted fast but the gas lever doesn't work. It worker about 3 yrs ago when I used it last pulling a 6' bush hog. Might something be stuck inside of the governor.
Thanks, Nella

That would not have anything to do with the governor. My  picture shows the lever at wide open. When the hand throttle lever at the steering wheel is pushed as far forward you should see the spring stretched to pull the cross over arm forward which in turn opens the throttle plate in the carburetor open to speed up the engine.  If thee cam is operating properly on the pin the spring on yours should be stretched. If your cross over arm can be moved freely you have to have something wrong with the spring.  The governors job is to hold the rpm to idle until the spring pressure overcomes the governor.  I would guess the spring is not strong enough if it is not broken.  The rod can slip in the hand throttle at the steering wheel to where it would not push the cam forward.   Try speeding it up where the spring attaches.  If nothing is binding that is the side to look for the problem. 



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