Check the voltage between the large BAT terminal on the alternator and the alternator case -OR- directly across the battery posts.
With the engine running you should see 14.0 - 14.5 volts. 12.6 volts or less says the system is not charging.
----
Regarding the "no charge" problem try this first:
Run the engine up to max RPM then push the "excite" button. It may simply be the replacement alternator has a higher "turn on" RPM than the old one.
If that doesn't work pull the aux connector from the alterator then test each connector terminal for voltage. You should see battery voltage at #1 when the "excite" button is pressed. And #2 should show battery voltage at all times.
----
If the above checks out (indicating the wiring is OK...) the problem could be the replacement alternator has problems. You can isolate the problem with this test:
With the engine running at about 1/2 throttle push the "excite" button. Now take a small screwdriver and touch its tip to the tab inside the D-shaped opening on the back of the alternator (photo). While keeping the tip in contact with the tap ground the screwdriver shank to the side of the opening.
If the ammeter show 20+ amps charge with the tab grounded it means the alternator's internal regulator is bad. However if still no charge the alternator is NG. Note: You can replace the internal regulator yourself for around $10.
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 - The Niagra View Mobile - Powered by a 1959 Ford Tractor - by Mark Massey. In 1959 the Niagara Frontier Transit Inc. of Buffalo, New York designed and built six Viewmobiles for the Niagara Frontier Sightseeing Inc. for use as a sightseeing ride at the Niagara Falls State Park, Niagara Falls, New York, powered by a 1959 Ford 611 Tractor.
... [Read Article]
Latest Ad:
Oliver 550 Diesel runs like a watch three point hitch pto engine gone threw about two hundred hours ago nice clean tractor
[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.
