|
Farmall & IHC Tractors Discussion Board |
Re: Batttery Cable Hookup
[ Expand ] [ View Replies ] [ Add a Reply ] [ Return to Forum ]
Posted by Bob M on May 14, 2007 at 10:18:53 from (151.190.254.108):
In Reply to: Re: Batttery Cable Hookup posted by John T on May 14, 2007 at 09:32:33:
John T - I kinda stumbled into that smaller cable thing. After I first converted my Super M to 12 volts (and retained the original 1/0 cables) when the starter engaged the mechanical shock was so severe you could feel it even in the seat. After a couple seasons of getting slammed like that the bendix blew apart and had to be replaced. On the advice of the guy at the starter shop I substituted a lighter #4 for the #1/0 hot cable when reinstalled the starter. Discovered this noticably softened the initial shock of starter engagement, yet still permitted the starter to crank the engine extremely fast. My theory: The slight added resistance of the smaller cable reduces the initial starter inrush (locked rotor) current and initial armature acceleration. This then reduces the mechanical shock of bendix engagement. However once the starter gets spun up, the faster armature RPM results in higher back EMF which causes the starter to draw LESS current than it does on 6 volts. (Higher armature RPM = greater back EMF = less running current). At this point the higher resistance of the #4 cable becomes essentially inconsequential. (Disclaimer: I could be all wrong. This is simply how I rationalized what I've observed and stuff I remember from EE courses taken 35+ years ago...) ---- "maybe you better be there if I get stuck??" Come on John T!!! Unless you "get stuck" in a muddy parking lot at the Expo and need a tow, I doubt there's much I'll be able to help YOU out with... Heck - I can barely SPELL "Wico", let alone answer questions about 'em!
Replies:
Home
| Forums
| Order Support
Today's Featured Article -
Product Review - by Staff. When we finally checked out the 3000 PSI North Star, the whole story chaned. This unit was equipped with an 11 HP Honda engine with fuel shutoff, adjustable flow and optional syphon degreaser dispenser. It didn't have a pressure release or electric start to facilitate easy starting but according to the instructions, simply pulling on the trigger while cranking was sufficient. This method of starting proved more than adequate and kept the cost down on the unit. It had all the important
... [Read Article]
Latest Ad:
1958 FORD RARE 4x4 801 TRACTOR, ELENCO/FRONT DRIVE, FRONTLOADER AND WEIGHTED REAR WHEELS, FIVE SPEED, LIVE PTO, GAS ENGINE, NEW REAR WHEELS AND TIRES, ENGINE RUNS.
[More Ads]
Copyright © 1997-2026 Yesterday's Tractor Co.
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. Yesterday's Tractors - Antique Tractor HeadquartersWebsite Accessibility Policy |
|
