IF I'm reading it right, the lever pops back to the low idle (or at least a lower speed) position on it's own.
That suggests that your governor is working fine, but that either the teeth on the throttle quadrant or the tooth on the lever are worn to a point that they won't hold against the tension of the governor. NOT at all unusual. It comes from years of somebody just slapping the lever forward, letting the teeth ride over each other.
It may also be as simple as the spring on the hinge pin of the lever is weak, missing or part of it broken off. Look first for the spring. There should be a cotter pin holding a washer that keeps the spring compressed over the pin and against the lever.
It's actually a pretty strong spring for no bigger than it is. When you pull the lever away from the quadrant, you should feel a good bit of tension, that is used to hold the lever in the notches. Not sure whether CaseIH still carries it or not. If that's a problem, you might also be able to find one that will do the job at a hardware that has a good assortment of springs.
The other issue is wear. If the teeth/notches on the quadrant are rounded over, they may not be holding like they should. New, the serrations were flat/perpendicular at the rear edge and angled forward to the next. The tooth on the lever will often have a deep notch in it where it rides on the quadrant. Wear on either side (lever or quadrant) will cause the problem, and is often a combination of the two.
There's always the replacement option. OEM has them, I believe.
For repair, the notch worn on the lever needs to be welded in and ground back down to match the unworn area. The quadrant is a little trickier, as you don't have much depth to work with there, but a triangular file or grindstone can be used to dress them up some. Just keep the back edge of each notch perpendicular to the plane of the quadrant.
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. [ About Us ]
Today's Featured Article - Good As New - by Bill Goodwin. In the summer of 1995, my father, Russ Goodwin, and I acquired the 1945 Farmall B that my grandfather used as an overseer on a farm in Waynesboro, Georgia. After my grandfather’s death in 1955, J.P. Rollins, son of the landowner, used the tractor. In the winter 1985, while in his possession the engine block cracked and was unrepairable. He had told my father
... [Read Article]
Latest Ad:
2022 John Deere 5045E, 4wd, front end loader and 3rd function with grapple. 120 hrs, 55k new, must sell
[More Ads]
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.
