Posted by Gerald J. on March 18, 2010 at 14:09:47 from (75.221.187.47):
Found the reference manual from 1980. It says SAE J538a was approved December 1955 and last revised June 1963. Reaffirmed without change January 1973.
As it reads in 1980, J538a says: "The negative side of the storage battery shall be securely and adequately grounded so that the voltage drop to the starting motor is held within the limits established in SAE J541."
I suspect the 1955 version allowed either polarity battery and the 1963 revision required the negative battery terminal be grounded.
J541a requires the voltage drop between the battery and the starter motor be less than 0.12 volts per 100 amps for 6 volt light and medium duty and 12 volt heavy duty. 0.2 volts per 100 amps for 12 volt light and medium duty and 24 to 32 volt heavy duty.
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 - 12-Volt Conversions for 4-Cylinder Ford 2000 & 4000 Tractors - by Tommy Duvall. After two summers of having to park my old 1964 model 4000 gas 4 cyl. on a hill just in case the 6 volt system, for whatever reason, would not crank her, I decided to try the 12 volt conversion. After some research of convert or not, I decided to go ahead, the main reason being that this tractor was a working tractor, not a show tractor (yet). I did keep everything I replaced for the day I do want to restore her to showroom condition.
... [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.