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Notched tooth throttle assembly (instead of saw tooth)


At higher RPMs, it doesn't hold as well as a notched tooth. I thought about the friction throttle, and still may go that direction, but like the more 'original' look of the notched tooth and thought I would try that route first.
 

I do not know of anyone who is reproducing the notched tooth throttle, only the saw tooth and the friction disc style. I might have a notched style that I would part with, but I would have to replace it with a saw tooth, and those are kind of pricey.
 
Messicks shows them to be available from CaseIH but you have to buy individual parts and total price would be over $200.
 
Throttles are about like Red vs. Green or Ford vs. Chevrolet personaly I prefer a genuine M&W friction throttle. If you are after originality they won't do though.
 
(quoted from post at 06:18:11 11/11/10)
At higher RPMs, it doesn't hold as well as a notched tooth. I thought about the friction throttle, and still may go that direction, but like the more 'original' look of the notched tooth and thought I would try that route first.
Click to expand...

My H has a notch style throttle and my M has the sawtooth, and they both don't hold for manure in higher RPMs. I have to use a small clamp with both. The notches are perfect and the spring is tight as well. My old H that I sold a while back had the M&W friction type throttle on it, and it stayed wherever put. I might go that route on my current tractors.
 
I rebuilt all three of my H and M's throttles. New pin and new bushing , notch type and they all three work great. You need just enough clearance in that bushing so lever can be operated smoothly. Shim the spring for max pressure still allowing movement and they work. I don't like the friction style on these tractors. That is what makes the world go around. Different opinions.
 
Sawtooth throttle controls are actually relatively easy to repair if you have access to a welder or can weld yourself. Run a heavy bead of weld along the worn teeth and on the single tooth on the handle.

Rough shape with weld with a bench grinder on both parts. Use a mill file to recut the notches into the throttle plate and the handle. I did one last year, took me about 3 hours to weld, grind, and file.

With a coat of paint on, you wouldn't know that it had been redone.

One last hint, I put a slight twist/bend in the handle so that the "tooth" in the handle engages the plate more agressively. Imagine a right triangle with the veritcal side to the right. both vertical surfaces (plate and handle) should be exactly parallel when they make contact. That is the slight bend that you may have to put in the handle.

as always, IMHO.
 
(quoted from post at 02:51:18 11/12/10) Sawtooth throttle controls are actually relatively easy to repair if you have access to a welder or can weld yourself. Run a heavy bead of weld along the worn teeth and on the single tooth on the handle.

Rough shape with weld with a bench grinder on both parts. Use a mill file to recut the notches into the throttle plate and the handle. I did one last year, took me about 3 hours to weld, grind, and file.

With a coat of paint on, you wouldn't know that it had been redone.

One last hint, I put a slight twist/bend in the handle so that the "tooth" in the handle engages the plate more agressively. Imagine a right triangle with the veritcal side to the right. both vertical surfaces (plate and handle) should be exactly parallel when they make contact. That is the slight bend that you may have to put in the handle.

as always, IMHO.
Click to expand...

The other end of the handle wears out also, and will even cut a groove into the underside of the plate. If you build up the end of the handle, and fill in the groove, you shouldn't need to "bend" the throttle handle.
 
I guess I don"t know the difference in notched or sawtooth. The one on our 53 H has been re worked so many times. It used to have fine teeth like saw teeth I guess you could call them. We just welded a piece on the outside rim with notches and another piece on the lever to engage the rim and works fine. I could get pictures for anybody wanting them.
 
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