You guys are confused, except for Bob in the message below. There are essentially two ratchet/pawl mechanisms. First is the one we're all familiar with between the crank itself and the engine crankshaft, which allows the engine to turn in the right direction without spinning the crank further.
The second ratchet pawl arrangement goes between the crank and the tractor/engine frame, and only allows the CRANK to turn in one direction.
That way, when the engine kicks back, the engine crankshaft catches the crank and tries to spin it backwards, but the second pawl catches the crank and keeps it from turning backwards.
As someone else pointed out, both mechanisms would have to be able to take the force generated by the engine trying to turn in the wrong direction. I'm not sure what would happen if the engine was suddenly stopped near the top of the power stroke, but intuitively that seems like a good way to break a rod or a crankshaft. Maybe a spring arrangement could be used to limit backward crank travel without a hard stop.
Probably a better idea to just make sure the timing is retarded sufficiently to make sure the engine is well past top dead center on the compression stroke before it fires. Remember, the model T used buzz coil ignition to start, and the timing wasn't all that accurate. The situation was even worse if the driver forgot to retard the spark before cranking....
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 - Show Coverage: Journey to Ankeny - by Cindy Ladage. We left Illinois on the first day of July and headed north and west for Ankeny, Iowa. Minus two kids, we traveled light with only the youngest in tow. As long as a pool was at the end of our destination she was easy to please unlike the other two who have a multitude of requirements to travel with mom and dad. Amana Colonies served as a respite where we ate a family style lunch that sustained us with more food than could reasonably fit into our ample physiques. The show at Ankeny
... [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.