I think you've got the whole series vs. parallel thing backwards. It wouldn't even crank with two 6's in parallel. 24 volts will fry every electrical part on a 756. In a series conection, the negative cable of one battery would be hooked to ground, and the positive cable of the first battery would be hooked to the negative terminal of the second battery. The positive cable of the second battery would be hooked to the starter. In a series connection, the voltages of the two batteries adds up, so with two 6's in series you get 12 volts, while the cold cranking amps do not double. In a parallel connection, the positives of the two batteries are connected and the negatives are both grounded. The voltage of the two batteries equlaizes, so the result of two 12's is 12 volts. However, the cold cranking amps doubles. Two 6's in series was factory on the 756. The advange of a series connection is that the reserve capacity of the batteries is greater, meaning you can crank for a longer period of time. With a parallel connection, you get a short burst of high amps. Those old diesels need long periods of steady cranking to build heat, so stick with two 6's in series. Check out your cables, they need to be very heavy. 756's are known for being cold blooded, so plan on plugging it in for a couple hours.
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 - Choosin, Mounting and Using a Bush Hog Type Mower - by Francis Robinson. Looking around at my new neighbors, most of whom are city raised and have recently acquired their first mini-farms of five to fifteen acres and also from reading questions ask at various discussion sites on the web it is frighteningly apparent that a great many guys (and a few gals) are learning by trial and error and mostly error how to use a very dangerous piece of farm equipment. It is also very apparent that these folks are getting a lot of very poor and often very dangerous advice fro
... [Read Article]
Latest Ad:
Sell 1958 Hi-Altitude Massey Fergerson tractor, original condition. three point hitch pto engine, Runs well, photos available upon request
[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.