Throttle twisting

I have a '44 H, which when I have the throttle near full power, the handle twists and doesn't allow the "notch" in the handle to engage with the teeth on the throttle disc. This means that if I want to be near or at full throttle, I have to hold the handle the entire time. Has anyone encountered this and if so, what is the solution?
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I had the one with the square notches. It did more or less the same thing. I took everything apart, replaced the pivot, drilled out the hole in the lever and put a bushing in it, and used a new spring. I now have a friction throttle lever on it, that came off a parts tractor I bought.
 
my a had a slot wore into the lever on the bottom wear it rubs on the plate and maybe the plate is wore, its fixable ,stumper
 
Problem is it's flat worn out.Either replace with a new one,or take it apart and replace the bushing,possibile the bolt....Then you can build-up and reshape the tooth and notches.
 
I"ve heard it said in certain circles, that if you can"t fix this type of problem, you might not be deserving of the honor of driving a classic Farmall.

That"s what I heard. You can add what you want.
LA in WI
 
Well, after I single handedly tore down the entire tractor (to the last bolt), replacing pistons, sleeves, tearing down the trans, doing my own paint and reassembling the entire tractor I must just be an idiot (in spite of my two Master's degree's). I guess I don't deserve to drive it for asking a question.
 
Hey there Jim,

Gosh, I didn"t mean to offend. And I would never have used words like "idiot" or anything similar to describe you. With all the talents and education you have and what you single-handedly did to that tractor proves you know more about that stuff than I do. I mostly know how to write out checks to get things fixed.

Back in the 1960s my dad put a friction throttle on his H. When I found that tractor back about 10 yrs ago I took off that throttle and put on the factory type. Now when I open it up on the road the throttle often jumps to a slower setting and I think "Yep, it is just like old times"! And at 76 yrs old, it just gives me a chuckle.

It"s raining here in Wisconsin for the 2nd day without letup, I"m idling away in my office, and the devil made me comment in a way I should not have. On the other hand, with all the little problems you will encounter owning an old tractor, you just have to have the ability to laugh at things sometimes.

"idling away in my office"....maybe I too need a new throttle!

At least, that is what I heard someone say. You can add what you want.

Sorry to you, Jim. Would rather be friends.

LA in WI
 
You can tinker and adjust, build up the tooth, tinker some more, cuss it 'cause it still misbehaves, or you can spend a little money and buy a brand new unit. Problem solved, and the new one will work so much better than you ever thought possible.

Been there, done that.
 
Jim, You probably aren't aware that replacements are available at a nominal cost. IH eventually saw the problem and replaced that one with ones that have square teeth--I have one, not sure those are still available. Look at oemtractorparts dot com, and you will find one. Also Steiners, etc. Ignore the degrading comments, some people get carried away. On the H I drove as a teenager, it probably moved out of the slot a thousand times.
 
The trick is to get just the right amount of clearance on the bushing. Too much, it twists too much, too little and it does not twist enough. I replace the bushing and bolt. Then ream bushing for proper operation. A good stiff spring is also necessary. I didn't buy any new parts for throttle. Did rebuild all the linkage all the way down to governor.
 
If the latch tooth is still in pretty good shape on the handle you can put a slight twist in the handle between the tooth and the pivot point. Just enough so that the tooth engages before the rear of the handle hits.
 

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