Model F Cut-off Switch

Anonymous-0 · Apr 25, 2012

Has anyone had experience installing a mercury cut-off switch for the ignition on a Mod. F ? My Dad said he did this back in the 1930s to shut down the engine if the tractor reared-up. My F doesn"t have fenders and I would like to plow with it. And/or has anyone put wheely bars on a Mod F? Thanks, Frank L

cdmn · Apr 25, 2012

I don't think the engine would coast to a stop until it was too late. You have the right idea about the fenders, they would cause the wheels to lift off the ground and prevent further rearing back.

Ferguson built a plow to use with the old Fordsons that had an upper link to stop the tractor rearing back. He further developed this idea for the 1939 9N tractors.

What most plow operators used otherwise, was a trip clevis, that was set for a certain breakaway load. If the plow hit a rock, it would break away from the tractor instead of making it rear back or instead of tearing itself apart. Later designs had variations on the trip-beam plow.

Bob Crane · Apr 26, 2012

make the drawbar about 1 foot longer, they had drawbar extenings for the old fordson f that would take care this

Anonymous-0 · Apr 26, 2012

I don't know if my Dad ever had an opportunity to try outthe mercury switch, because his tractor had squared fenders. My IH "Little Genius" plow does have a spring loaded brake-away hitch mechanism, so maybe I'm all set. Thanks for your input. FL

Clifton Frank · Apr 26, 2012

I have already done that and connected an angle brace to the differential. It was a 1" plate that I had, but after installing it, it still looks alittle short. That may be because my Mod F has after-market lugs on the rear rims (grousers removed) and rear tractor tires bolted over them(for road use) which makes back end sit a little high. When I take the rubber off to plow and the lugs bite in, that 1 foot extension may look about right. Tks. Bob FL

Model F Cut-off Switch

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