Re: Farmall Regular Govenor

Posted by LenRahilly on November 28, 2006 at 08:40:33 from (24.50.99.60):

In Reply to: Farmall Regular Govenor posted by CTJohn on November 23, 2006 at 17:30:42:

A few words on the "Regular." First, a little
quibble: IHC never called this tractor "Regular. Their literature called it "the original Farmall," to distinguish from F-20. Farmers would say, "She ain't a F-20, she's jist a reg'lar Farmall." Heard that myself when I was growing up.
The earliest Farmalls (and 10-20 and 15-30) had a governor with open linkage from the governor housing to the carburetor. In the late 20s, the linkage was enclosed. As far as I know, both the later "Regular" governor and the F-20 governor were identical until IHC put a variable governor on the F-20 around 1937.
There were parts companies in the late 30s and up into the 40s that sold kits to convert the Farmall and F-20 governors to the variable type, but I don't think IHC did this.
I may have an ancient catalog that shows one of these kits, and I'd photocopy and send this to you if you're interested. Also have parts catalogs for both tractors, and would copy the governor section and send to you if this would be helpful.
Worn linkage will definitely cause the governor to "hunt," because the slop in the connections means that the governor will always be behind the demand for more (or less) power.
As one of your other correspondents said, this type of governor works at full-throttle only. The springs on the weights try to speed up the engine, and the weights flying outward try to slow it down. The little knob on the back of the governor housing gives a little adjustment to the full-load governed speed.
On the variable type of governor, there are no springs on the weights. The operator's throttle control pulls on a spring to speed up the engine, and the weights flying outward try to slow it down. By varying the tension on the spring, the operator can have good governing over a fairly wide range of engine speeds. If you ever get a look at a late-model F-20, you can see how this works. Where your tractor has that little round adjuster coming out of the governor housing, the variable-governor has a rod that is attached to the throttle control. This rod pulls on the spring which is inside.

Full-load speed on both these tractors is 1200 rpm. I used to check this by putting a little rev-counter on the belt pulley, which on the F-20 turns at 654 rpm when the engine is turning at 1200. The no-load governed speed for this engine is 1290 rpm, so you would have to calculate the pulley speed as a ratio of the engine speed (in other words, divide 1200 by 654 to get the fraction, then apply that number to whatever you get from the pulley at full-throttle no-load speed; does any of this make sense???).
I have this information buried in a bookcase in the basement, and would be happy to find it and give you the numbers on pulley rpms in relation to engine rpms (will need to check the Farmall operator's manual to see if the pulley speed is the same as on the F-20; the 3-speed gearbox on the Farmall MIGHT have slightly different gear ratios for the pulley). Write me at: fieldrahilly @adelphia.net. I'll probably enjoy doing this, even. I drove "Regulars" and F-20s for a good 10 years back in the forties and early fifies. Loved them, I guess, but they sure are brutes to ride on in the field.

Replies:

• Re: Farmall Regular Govenor LenRahilly 14:53:34 11/28/06 (0)

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