So how do I know if my tractor has a class A or B charging system?
If it's a Class B, inside the genny one end of the Field (two sides in series) is grounded and other end goes out to the FLD Post
If its a Class A two brush one end of Field is wired to or same as the ARM post and the other end (of two sides in series) goes out to the FLD post
If its a Class B you apply regulated voltage to the FLD post to control rate of charge
If its a Class A you apply a regulated (straight or resistive and controlled/regulated by VR) GROUND to the FLD post to control rate of charge
If it charges fine if you dead ground the field (full fielding) but not otherwise its likely a Class A. If it charges fine if you apply voltage to the FLD (full fielding) its likely a Class B.
TROUBLE IS when I was a used tractor dealer I saw so many tractors charging systems CHANGED MODIFIED OR JURY RIGGED so just because a tractor was original Class A (such as some Fords) doesnt prove it still is so reading the above may show what yours is HOWEVER if it charges good with FLD dead grounded that tells me ITS A CLASS A.
Again a dead ground on FLD making her charge good sounds like an A while applying voltage to FLD making her charge sounds like a B
Does this answer your question ?? any more questions??
If its a Class A try my Troubleshooting Procedure to help find the problem. Make sure BOTH the VR and Genny have good grounds, try a grounding jumper.......My Motor test (Para 5) and full fielding test (dead ground FLD post) can tell if the genny itself is okay and therefore the VR or its bad ground may be the problem
Upload one or more videos to your post. Photo and video filesizes should be less than 5MB. Formats allowed are gif, jpg, png, ogg, mp4, mov, and avi. Be sure to use filenames without spaces or special characters, and filetypes of 3 digits lower case.
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 - Tuning-Up Your Tractor: Plugs & Compression Testing - by Curtis Von Fange. The engine seems to run rough. In the exhaust you can hear an occasion 'poofing' sound like somethings not firing on all cylinders. Under loaded conditions the tractor seems to lack power and it belches black smoke out of the exhaust. For some reason it just doesn't want to start up without cranking and cranking the starter. All these conditions can be signals that your unit is in need of a tune up. Ok, so what is involved in a tune up? You say, swap plugs and file the points....now tha
... [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.
