Issue with Friction Throttle

[Aaron SEIA]

Bought my boy a friction throttle for his M and we've run into an issue. You can see in the picture, the throttle rod is hitting the casting well before the tractor is at an idle. What's the fix for this or what are we doing wrong?
AaronSEIA

 

[wh]

You may have to “bend” the rod in a curve so that it does not hit the steering column. In doing this you may have to adjust overall length.

 

[Janicholson]

You may have to “bend” the rod in a curve so that it does not hit the steering column. In doing this you may have to adjust overall length.

I agree bending the smalleer section of the rod just where it comes out of the tubular main section will work. bending that toward the steering shaft maybe 30 degrees will do it. jim

 

[used red MN]

The opposite end of the rod is threaded, on it is a piece with a swivel pin that goes in the bell crank on the engine. It is arranged with nuts on the threads of the rod so a spring sets on each side that allows cushion when the bell crank comes to the end of its stroke at either full throttle or at idle. It is shown in the link as parts 4,5 & 7 CNHI Farmall M parts catalog not to clear. If you pull the hood you will be able to see it and figure it out. You may be able to make adjustments to allow it to work properly. It is also possible some of the throttle pivot joints have too much wear to be able to adjust it out.

 

[Aaron SEIA]

The opposite end of the rod is threaded, on it is a piece with a swivel pin that goes in the bell crank on the engine. It is arranged with nuts on the threads of the rod so a spring sets on each side that allows cushion when the bell crank comes to the end of its stroke at either full throttle or at idle. It is shown in the link as parts 4,5 & 7 CNHI Farmall M parts catalog not to clear. If you pull the hood you will be able to see it and figure it out. You may be able to make adjustments to allow it to work properly. It is also possible some of the throttle pivot joints have too much wear to be able to adjust it out.

Thanks. We didn't dig too far into it yesterday. I was hoping there was a way to adjust it. I'd hate to have to put an obvious bend in the rod.
AaronSEIA

 

[BarnyardEngineering]

Thanks. We didn't dig too far into it yesterday. I was hoping there was a way to adjust it. I'd hate to have to put an obvious bend in the rod.
AaronSEIA

What are you going to adjust? It's all solid metal, solidly mounted.

Rotate the rod 180 degrees and insert it from the top.

 

[DeltaRed]

What are you going to adjust? It's all solid metal, solidly mounted.

Rotate the rod 180 degrees and insert it from the top.
View attachment 98585

Bingo!

 

[used red MN]

What are you going to adjust? It's all solid metal, solidly mounted.

Rotate the rod 180 degrees and insert it from the top.
View attachment 98585

That’s a good suggestion, I don’t have one of those fancy things. The way he has it is the stock position. It can’t be turned over when used with a stock throttle lever. I was thinking he could adjust it so it would reach the idle position before the rod got into interference. This is what the other end looks like.

 

[wh]

What are you going to adjust? It's all solid metal, solidly mounted.

Rotate the rod 180 degrees and insert it from the top.
View attachment 98585

Well duh! Always a simple fix.

 

[BarnyardEngineering]

That’s a good suggestion, I don’t have one of those fancy things. The way he has it is the stock position. It can’t be turned over when used with a stock throttle lever. I was thinking he could adjust it so it would reach the idle position before the rod got into interference. This is what the other end looks like. View attachment 98607

You need the full range of motion to get the full range of throttle. If you take a bunch out of the bottom end, you lose a bunch on the top end.

 

[BarnyardEngineering]

I just went out and looked at my Dad's Super H. The friction throttle on his is a little different, seems like there is a little more clearance. I think it is a genuine M&W, while this one here is a knock-off. The rod is installed up from underneath, and is not bent.