(800) 853-2651
SHOP NOW

40T Governor Stuck?

M

mr.precision

Member
Finally got the 40T back together with new rings, rod bearings and a few other items. Purrs like a kitten (at idle), however I cannot get the throttle to work correctly.
Set all the linkage rods by the book. I can hold the throttle closed by hand, but any opening of the throttle at all just makes the motor take off. The spring that connects the upper throttle control to a stationary pin yanks the throttle wide open if you don't hold it closed at the bottom linkage rod.
this tractor sat a long time and I have found many items stuck, including the pistons, rings, lifters etc. Does the governor have some components that can stick making the throttle stay open all the time?
Thanks in advance-
mike
 
Don't know your unit. BUT " yanks the throttle wide open " should be a clue -ie; not installed correctly. HTH
 
What Bob said. Take the carb back off and remove the butterfly. Flip it so the butterfly is almost completely closed when the idle screw (with spring) is against its
stop.
 
Yeah I thought of that. Cannot flip the butterfly. The carb is set up properly.
The instructions for adjusting the linkage say the following:
“Push governor lever ( C ) as far down as possible and turn adjustable yoke until hole in yoke lines up with the hole in governor lever. "
This has to be a clue. If the governor lever is pushed down as far as it will go, the governor connecting rod is not long enough. It is original. It would appear the governor isn't right because all the linkage rods and carb connections are original.
Diagram is for a 420, essentially the same as a 40.
46795.jpg
 
Pull the governor cap assembly off and check to see if the thrust bearing and weights are sliding freely on the rod, if they are stuck it could cause the problem you describe.
 
Not trying to be smart but something is backwards. The governor does not pull the rod to speed up an engine. It's only purpose is to limit engine speed by pushing back. If you start the engine and run it at low idle you can reach in and try to speed up the engine with the throttle shaft on the carb and the governor
will push harder against four fingers to keep the engine speed down. Air being pulled through the venturi is what pulls the butterfly open and speeds up the engine as far as the
governor will allow. Yes the throttle shaft can be installed with the stop on the backside of the carb stop instead of on the front where it's supposed to be & it will
work backwards when this is done. Some other makers use the same style carb and do this.

You very well may have a governor problem since you can't set the rods correctly. This needs to be addressed now before it disintegrates and you bust the corner off the
engine block. If i'm not mistaken there's only three bolts holding the gov on so pull it and have a look see. Get the rods correct before you start it again.
 
Thanks, M-Man.
"If you start the engine and run it at low idle you can reach in and try to speed up the engine with the throttle shaft on the carb and the governor will push harder against four fingers to keep the engine speed down."

This doesn't happen. The governor doesn't push to counter the action of the throttle shaft when moved by hand. So something's stuck in the governor. I will remove this week and post results.
 
Took the governor off. Not as easy as I thought. Radiator has to come out, fan has to come off, and a few other things.
Weights and thrust bearing were all rusty and stuck. I cleaned and polished the shaft that supports the thrust bearing, got everything freed up, and put back together.
Tractor runs as it should now.
I don't know how the inside of the governor got so rusty. Makes one wonder what the rest of the motor insides look like.
 
You must log in or register to reply here.

Similar threads

K
1929 GP Throttle/Governor Issue
Replies
1
Views
271
ET
E
haytedder
4020 throttle stuck wide open
Replies
3
Views
371
fdt860
F
T
Ford 3000 governor linkage issues
Replies
0
Views
194
Travis152
T
J
1010 governor
Replies
2
Views
510
jdnate1947
J
J
1010 governor
Replies
0
Views
333
jdnate1947
J
Tractor Parts Tractor Manuals

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Copyright © 1997-2024 Yesterday's Tractor Co.

All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters
Website Accessibility Policy

Back
Top