How do throttles get so far out of adjustment.

mkirsch · Sep 25, 2008

I've purchased a Super A and a Super C this year.

On both tractors when I got them, the throttles were seriously screwed up. Idle was at the mid throttle position. Pull the lever back to the idle position, and the tractor stalls.

It's a rather simple adjustment to fix this problem, but I'm curious to find out how they get so far out of whack in the first place.

rustyfarmall · Sep 25, 2008

I have encountered the same thing on Farmall Hs. I think it basically can be blamed on un-educated shade tree mechanics.

ScottyHOMeY · Sep 25, 2008

"un-educated shade tree mechanics"

I hope that's not a reference to the farmers that fixed what they had to on the fly to keep their tractors runnin' and make a livin'.

ScottyHOMeY · Sep 25, 2008

In a lot of cases like that you'll find that the carb has been replaced, and the geometry of the linkage on the new carb (length and angle of the throttle arm, for instance) is enough different to throw things off.

I've had them go both ways. I replaced the Carter on my SuperC with a Zenith, and it operated over the bottom two thirds of the total throw of the lever. Replaced the rotted out Zenith on my BN with a new Zenith, and it only wanted to operate over the top two thirds. In that case, though, unlike yours, the bottom third did nothing, it didn't kill the engine.

Once I got the left side squared away on both, I did some fiddlin' with the springs on either side of the block connecting the control rod and the governor, and I've got all but the last two notches to work with on the SuperC. The BN has been a little less cooperative and required some straightening and adjustment in the angles on the control, but I'm gainin' on it. Got the full range for engine speed on both, low to high idle, just not as fine an adjustment between engine speeds as you would get with the full use of the lever.

rustyfarmall · Sep 25, 2008

Nope. I'm talkin' about the folks who go out and buy a set of wrenches at wally world and commence to fixin' without the benefit of an instruction manual or to bother asking questions.

Anonymous-0 · Sep 26, 2008

Those models get wear in the gov linkage and the rod going to the carb gets changed by people not knowing how to set them properly and who else would know what some people dream up. I find some pretty funny things when working on them.

Anonymous-0 · Sep 26, 2008

Yes that means farmers who didnt have cotterpins and used nails then wire what else as town was too far away and during the war you couldnt buy things either.

CGtractor · Sep 26, 2008

I have a B and a 504 that were the same way when I bought them. I assumed it was someones attempt to get more rpm out of the engine! The H and M weren"t as handy to "tinker" with as the different style of governor/linkage was mostly concealed.

boomer22 · Sep 26, 2008

I've yet to figure the linkage out on my H. Someone modified the throttle rod lever and support piece by welding a square nut on top, but if I change it to the normal hole it just don't fit right. I'll get it sometime just got me stumped for now.

ScottyHOMeY · Sep 27, 2008

Yep! I put a couple of those bent nails right back where Grandpa had them when I restored his BN. I just wouldn't be callin' him an uneducated boob for havin' put them there.

mowr · Sep 30, 2008

Some people are just automatically rough on things; slam, cram, thank you Sam! I've seen more than I want to of levers, linkages, gears, etc. damaged by people with hands, feet and maybe tempers that are less well-controlled than others.

How do throttles get so far out of adjustment.

mkirsch

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rustyfarmall

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ScottyHOMeY

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ScottyHOMeY

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rustyfarmall

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Anonymous-0

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Anonymous-0

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CGtractor

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boomer22

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ScottyHOMeY

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mowr

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