Thanks to Spiffy 1 for the kind remarks. The note on the variable governor brings to mind what the "non-variable" governor was like. In a word, it didn't really govern unless the throttle was wide open. Moving the throttle lever toward "slow" simply closed the butterly at the carb. I have many, many memories of trying to rake hay with an F-20, using 3d or 4th gear to keep the noise down. Going uphill on part throttle, the engine would simply slow down, and going downhill, it would speed up. The reason for this is that the old-style governor works primarily by having the main governor springs pull the weights together, thus opening the throttle. Centrifugal force, working against the springs, would keep the throttle at the right opening to develop governed speed. This was, in effect, a "pre-calibrated" speed that was determined by the resistance of the springs. There was a slight adjustment via the strange-looking bolt on the back of the governor housing, just in front of the mag. This adjustment provided a slight counter-force to the main springs, as I understand it. The variable governors on these tractors have no springs on the weights. Spring tension is provided by the throttle lever, and the weights work against that tension. Partial tension means partial throttle, but WITH good governing action. A wonderful mechanical advance. It is "interesting" that IHC put a variable governor on the F-12, but did not convert the other F-series, 10-20, W-30, 22-36 and probably others in that line to variable governor until the late 30s, maybe 1937, but in 1938 for sure. There WERE late-model 10-20s with a variable governor. The little lever was replaced with a notched pull-rod, similar to the one on an F-12 and late model F-20. Have seen pictures of these in brochures, but can't put a date on them.
We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]
Today's Featured Article - Tractor Traction - by Chris Pratt. Our first bout with traction problems came when cultivatin with our Massey-Harris Pony. Up till then, this tractor had been running a corn grinder and pulling a trailer. It had new unfilled rear tires and no wheel weights. The garden was already sprouting when we hooked up the mid-mount shovel cultivators to the Pony. The seed bed was soft enough that the rear end would spin and slowly work its way to the downhill side of the gardens slight incline. From this, we learned our lesson sinc
... [Read Article]
Latest Ad:
1965 International Harvester McCormick Farmall cub tractor 2,500. Two owner tractor. My grandfather bought new in 1966, then we inherited it. Have all the paperwork original manual and all maintenance records. It starts and moves. Comes with underbelly mower, plough, and some other attachments.
[More Ads]
All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy
TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.
