(800) 853-2651
SHOP NOW

Farmall M Throttle Problem

K

Kasrjs Smith

New User
I am in the process of trying to get a farmall M back into working condition. It was restored about 1996, but sat in a barn for about the past 15 years unused.

As a start, I rebuilt the carburetor with a kit, and the tractor started right up. However there is no throttle control. The tractor only runs at one speed.

I tried disconnecting the throttle linkage so I could control the throttle near the carburetor, but I found that with the engine running there does not appear to be any play at all in the throttle, I can move the throttle but it feels like I can only move it by stretching the springs, which I assume is not normal.

Does anyone have any thoughts on how I can get the throttle to function properly?

Thanks,
Ken
 
Try removing the rod that goes to the arm on the back side of the governor- if you can move the arm and the rpm"s don"t change, maybe the arm is broke off the cross shaft that increases the spring tension (thereby increasing rpm"s.) Just this summer the arm broke off the governor shaft on my M, and I had to re-weld it back on. It"s one of those things that you think, "How could I break that?", But mine did. You never know how someone treated that tractor the fist 50 years of it"s life.
 
I should add that with the engine not running, you should be able to push down on the arm I am talking about and feel the spring tension, if you cannot, that's when it is time to take the governor off and see if the shaft is broken off the arm, or maybe the spring inside is broke. You can see if the spring is broke by just removing the side cover, without taking the governor housing off the engine.
 
Teddy's comment is the answer (My bet).
That tab and slot are easy to get wrong.
It is in the governor tube connection at the carb.

Jim
 
broken gov. spring--you could have missed the throttle conection at the carb--butterfly in backwards--throttle rod frozen in shaft between carb and gov head
 
When rebuilding the carb, did you check for free movement of the throttle shaft after assembly? If the throttle plate was removed, is it re-installed right side up on the throttle shaft?
 
I did not remove the throttle plate when I rebuilt the carburetor. An there was free movement of the assembly. But you're right, it does act like the throttle is not moving. Could it be an extremely out of adjustment idle screw?

There is some free play of about 1.5 inches in the throttle shaft when the engine is off, but when it is running, the throttle is held tight by the springs. Is that normal?

Thanks for your help.

Ken
 
I looked at the springs and they seem to be intact. Also the throttle seems to be held tight by the springs when the engine is running.

I did check the movement of the throttle rod. That was free. I am not 100% sure the rod is properly in the butter fly, but I think it is.

Is it possible that the problem is in the carburetor adjustment itself? Also, can I disassemble the governor tube from the carburetor while the engine is running? Then I could test to see if the problem were in the carburetor.

Thanks,

Ken
 
I think I did properly make the connection , but I will double check.

One thing that is clear though is that the throttle lever is nearly impossible to move when the engine is running. When it is not running there is some play that rotates the shaft in the tube.

Could the problem be in the governor?

Thanks,

Ken
 
Thanks Andy,

I will check it out more closely. Should there be play in the throttle arm when the engine is running? That play is what moves the throttle rod when I have it disassembled. When the engine is off there is is play of about 1.5 inches before you feel the springs. With the engine running, there is no play at all in the throttle arm. All movement is against the springs. Is that normal?

Thanks,

Ken
 


Thats how Governor's function, as your RPMS increase the tension increases as to push the throttle closed. I dont know how hard it would be to fight the throttle but I think the governor itself is doing its job.
 
You must log in or register to reply here.

Similar threads

D
A govenor
Replies
7
Views
445
gene bender
G
B
Ford 2000 throttle/governor issues
Replies
5
Views
284
MarkB_MI
MarkB_MI
C
Ford LT11 with Briggs question
Replies
2
Views
170
CBenedict1024
C
C
Ford LT11 Lawn Tractor
Replies
2
Views
214
CBenedict1024
C
L
Farmall C263 governor problem
2
Replies
33
Views
988
used red MN
U
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