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Farmall Super AV Questions

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'49 Super AV

07-29-2006 04:44:13

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I have a few questions regarding the Super AV that I just got done restoring. First, when I put the tractor in 4th gear and attempt to drive down the road with it, it appears that the engine does not have enough RPM to keep up with the tractor speed and it wants to stall out. What could cause this? Second, what implements can be used with this tractor? Do they have to be made for a Super AV, or can Super A implements be used on this tractor? Also, does anyone know where I can find a drawbar for this tractor? Thank you for any help.

Tom

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s.parker

09-08-2006 21:19:01

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Re: Farmall Super AV Questions in reply to '49 Super AV, 07-29-2006 04:44:13

I have a 1954 Super AV that has no problem taking off in 4th gear. I have to feather out the clutch and max. the rpm's to have it start in 4th, otherwise I start in 1st gear and work my way up just like you are shifting a car, the gears seem to mesh well, but the only troubled gear is from third to fourth, push in the clutch and shift fast to mesh the gears, then it rides like a charm.

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CNKS

07-29-2006 18:05:20

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Re: Farmall Super AV Questions in reply to '49 Super AV, 07-29-2006 04:44:13

It should run ok on level ground. There is no main jet adjustment unless you have a kerosene/distillate engine. You can try adjusting the float a little richer, although those engines run a little rich anyway. Be sure your timing is right, and also the governor.

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Hugh MacKay

07-29-2006 08:02:27

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Re: Farmall Super AV Questions in reply to '49 Super AV, 07-29-2006 04:44:13

Tom: Most Super AV implements are Super AV specific. It's usually just lift linkage that are different from regular SA implements. One would almost have to discuss each individual implement as some will have more differences than others. Parts book would be best way to sort that out.

Regarding the power in 4th gear, I've never owned an offset high crop. The gear ratio from engine to rear axle is exactly same on a SA as it is on a SAV. You can not expect the same power turning those big tires, and it's probably just as well. Just an example and I have the 130 figures right in front of me. 2nd gear in the hi-clear is 4.8 mph, 3rd gear in regular 130 is 4.8 mph. 4th gear in hi-clear is 13.2 mph while regular 130 is 10 mph. Your SAV has the same gear ratio as 130, couple that with the fact SA rpm is about 200 less than 130.

My calculations make the SAV in 4th gear a Rolls-Canardly. Rolls down one hill and can hardly climb the next. There was an old engine rebuilder in my home town, specialized in Farmalls. He always said there was no way those little C-113 and C-123 engines could handle 36" tires with ratio of SAV or SC for that matter. He always claimed the engine gave great service with 24" wheels, but not so great with 36" wheels. That is why I never bought one. His saying was if you want big wheels, buy an H

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