Posted by old fashioned farmer on March 14, 2013 at 14:37:02 from (99.160.220.88):
Howdy,
Got a farmall A in the shop with an electrical issue. The tractor is 6 volt, positive ground. Not sure what is wrong with it though. The generator and voltage regulator were taken to a shop and checked out okay. When the tractor is not running and the switch is on the third position the lights come on and it shows discharge. In the other two positions there is no change with the ammeter or lights. When running, there is no movement in the ammeter on the first and second positions of the switch but it swings to the discharge at around 15amps when in the third position with the lights on.
I checked the battery and it shows 6.4 volts when the tractor is both running and not running. I have polarized the generator. I am wondering about the switch as to whether it is correct for this tractor. It is a replacement switch and here is what it has on it. At the top there looks to be a resistor with no connections. Below it is a terminal marked F. Below that is a silver box with two connections on it and it is marked Bat. To the side is a connection marked L.
The tractor is wired as follows:
F terminal on generator to F terminal on voltage regulator. A terminal on generator to GEN terminal on voltage regulator. BAT terminal on voltage regulator to BAT terminal on switch. Second post on BAT switch terminal to ammeter. L post on voltage regulator to F terminal on switch. Second post on ammeter to starter.
I also checked my connections with the ammeter with the tractor off. I get 6.4 volts at all posts (except L on the switch and the F on voltage regulator).
I am wondering if the voltage regulator and switch may be incorrect for this tractor. Any assistance in solving this mystery would be greatly appreciated. Thanks in advance and God bless.
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 - Some People Like Red - by Art Willis. I was smitten, as a little boy, by red tractors. I used to play in the coastal sand of my Dad & Mom's home with little red tractors, trucks and cars. I grew up believing that like fire trucks, ALL tractors are supposed to be red! Today, the only way I would drive a John Deere is if someone would paint it RED! Driving a Tractor for the first time - About 19 years ago, when my wife Donna and I moved to what was the country then, I was given access to a large Farmall tractor by a wi
... [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.
