Posted by Owen Aaland on August 06, 2009 at 22:39:45 from (65.174.247.87):
In Reply to: Farmall H noise posted by Bill Bowen on August 06, 2009 at 13:15:57:
Looking at how they broke will give a clue to the reason for the failure. They are more likely to fail from being too loose rather than too tight. A properly tightened bolt will be stretched a little bit but not so much they will not return to the same length when removed. (Torque to yield bolts are tightened to a point beyond where they will return to there original length. That is why they are to be replaced rather than reused.)
The friction between the flywheel and the crankshaft is what keeps the flywheel from moving on the crank. As long as the dowel pin is still in good shape it is unlikely that they sheared off. Sheared bolts will have the metal smeared off to one side. A bolt that has sheared on a baler is good example of this type of failure. A more likely cause in your case is they were not tight enough to have been stretched properly This will allow movement/vibration between the crank and flywheel. This little bit of movement causes the bolt to stretch just a bit, maybe less than .001 of an inch. This isn't much movement but over time it work hardens the metal to the point where it becomes brittle. If this is the reason for the failure the metal at the break will be crystallized. Broken head bolts usually display this type of failure.
A bolt failure from being over tightened will usually have a circular pattern in the metal as a result of the twisting.
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 - Memories of an IH Super A When I was ? up to 10, I worked on my Papaw's farm in Greeneville, TN every summer. As I grew older (7), it was the thrill of my day to ride or drive on the tractor. My Papaw had a 1954 IH Super A that he bought to replace a Cub. My Papaw raised "baccer" (tobacco) and corn with the Super A, but the fondest memory was of the sawmill. He owned a small sawmill for sawing "baccer" sticks. The Super A was the powerplant. When I was old enough (7 or 8), I would get up early and be dressed to
... [Read Article]
Latest Ad:
Variable pulley for case 1530 skid loader
[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.
