The chart is just great! Did it come from an IHC publication? When I was about 12, I often used a relative's F-20 on 36" rubber. I knew that 36" tires would make the tractor much faster than the original 40" wheels. The big wheels were needed to clear the brake drums. Whenever this tractor was equipped with smaller tires, the wheels had to be turned out, making for a very wide tractor.There was no easy way to measure the speed, so I compared it in my head to tractors which had speeds I knew from their specifications. The F-12 was supposed to do about 3 mph in second, and that was about what the F-20 did in first. The F-12 was supposed to do about 4 in third, and one time, I had my brother drive the -12 while I went side-by-side in second on the F-20 (very similar speeds).
One of the really obvious results of this increase in speed on 36" rubber was that even in low gear, the F-20 was sometimes too fast for the PTO-driven 42R combine we used, if there was a sudden increase in the volume of grain going in. It is fascinating to see these numbers, because during those years, when I was pretty nuts about tractors (well, more than now, anyway), I made up my own estimate of F-20 speeds on 36" rubber: 1st 3 mph, 2nd almost 4, 3rd about 4-1/4 and 4th a little over 5. These turned out to be fairly close to the numbers in this chart. We can assume that the ground speed would vary a little bit when the tractor was under load or running free at high-idle speed.
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 - Experimental Tractors Article - by Danny Bowes (Dsl). Tractor technology appears to have nearly hit it's pinnacle of development. If you agreed with the subtitle, you are rather mistaken. Quite, actually. As a matter of fact, some of the technology experimented with over 40 years ago makes today's tractor technology seem absolutely stale by comparison. Experimentation, from the most complex assembly to the most simple and mundane component, is as an integral a part of any farm tractor's development
... [Read Article]
Latest Ad:
1964 I-H 140 tractor with cultivators and sidedresser. Starts and runs good. Asking 2650. CALL RON AT 502-319-1952
[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.
