Posted by Owen Aaland on September 14, 2011 at 17:35:07 from (216.47.32.147):
In Reply to: Super A to 12 volt posted by David Lampman on September 13, 2011 at 22:50:18:
The Delco One Wire alternator uses only one wire. The ground is back through the frame. The voltage sense and excite connections are made internally in the regulator. Because of this the excite wire has a current draw even with the engine shut off. On some alternators this draw may be enough that you can have trouble starting the tractor if it sits a few weeks without being used. The current flowing through the excite terminal goes through the rotor windings an its way to ground. Since the current draw is so small the resulting magnetic field created in the rotor is also small. The smaller the magnetic field the faster the rotor must turn before it can begin to charge. One it begins to charge the alternator RPMs can be brought down to an idle and it will continue to charge.
The advantage of the single wire is that it the easiest to install, especially if you do not have to change the battery polarity. You can usually just take the wire from the A terminal of the generator and connect it to the alternator. Connect the Gen and Bat wire together at the regulator and you are set to go.
The disadvantages are that it always has a draw through the alternator and will shorten battery life if not used regularly. It also requires a higher RPM to start to charge, on some it may be near full throttle.
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 - Women and Tractors - by Teri Burkholder. The View from the Garage - Never a doubt, everything on our farm is a learning experience. I've been working very hard to get our two rundown Farmall A's sanded, primed , bondo�d, fiberglassed and painted before our big local tractor show called the Tulip Festival. My husband Ben came in the garage one rainy day to see if he could "help". Well if you knew Ben you wouldn't want him anywhere near your spray gun, fiberglass or bondo! So I pulled out the 2 old yucky looking magne
... [Read Article]
Latest Ad:
For sale Farmall super A tractor is complete and has just been setting for awhile,it was running when pulled out of the barn,shouldn’t take to much to get it going asking 1100.00
[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.
