Re: Farmall BN charging system

Posted by Roger Mills on December 01, 2006 at 08:41:57 from (204.13.130.86):

In Reply to: Farmall BN charging system posted by BobOHIO on November 29, 2006 at 19:53:47:

Service manual says to disconnect wires from Field post on gen if engine is run with no battery connected or the armature WILL be damaged. 6 volt 3 brush generators use a "Hot" field where the post is the low side and max output is with the field post grounded and less output when it goes through an external resistor to ground. This post is either connected to the field connection on the cut out box or to one in the light switch. The generator will have no output if the field is disconnected. With no battery connected the armature current goes sky high through the cutout coil to ground. This heats it up and melts the solder at the commutator. When the battery is connected it comes up to voltage and a second winding in the cutout coil opens the contacts and disconnects the armature. At least that is the description in the book.

Replies:

Add a Reply Name: E-Mail: Subject: Comments: Optional Link URL: Link Title: Optional Image URL: Email Notification: If you check this box, email will be sent to you whenever someone replies to this message. Your email address must be entered above to receive notification. This notification will be cancelled automatically after 2 weeks.

TRACTOR PARTS	TRACTOR MANUALS

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 ]