mags advice

Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic

    Ok guys i have a question  I am getting no spark from  my 1940 B  I put new plugs in it  also on my 1938 B the mag is a model J   with a number 4b16a on it  now on the 1940 B it has mag k46 on it.  the caps are different on both on them   my main question is how can one check to see if a mag is in need of repair and where to get one repaired at thanks Tim 

	This site is not affiliated with AGCO Inc., Duluth GA., Allis-Chalmers Co., Milwaukee, WI., or any surviving or related corporate entity. All trademarks remain the property of their respective owners. All information presented herein should be considered the result of an un-moderated public forum with no responsibility for its accuracy or usability assumed by the users and sponsors of this site or any corporate entity.
	The Forum	Parts and Services	Unofficial Allis Store	Tractor Shows	Serial Numbers	History

Author	Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic
Tim in arkansas Members Profile Send Private Message Find Members Posts Add to Buddy List Silver Level Joined: 11 Sep 2009 Location: Charleston AR Points: 191	Post Options Post Reply Quote Tim in arkansas Report Post Thanks(0) Quote Reply Topic: mags advice Posted: 30 Jan 2011 at 8:57pm
	Ok guys i have a question I am getting no spark from my 1940 B I put new plugs in it also on my 1938 B the mag is a model J with a number 4b16a on it now on the 1940 B it has mag k46 on it. the caps are different on both on them my main question is how can one check to see if a mag is in need of repair and where to get one repaired at thanks Tim
	Allis Chalmers fan from Arkansas

Sponsored Links

RyanTN Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 12 Sep 2009 Location: Stewart Co, TN Points: 415	Post Options Post Reply Quote RyanTN Report Post Thanks(0) Quote Reply Posted: 30 Jan 2011 at 9:47pm
	Tim, i will take a stab at answering your questions, but Steve at B&B custom circuits is the forum expert here when it comes to magnetos. He rebuilt my first one, before I got comfortable working on them myself. I was very pleased with how it turned out. Sandy Lake Implement also sells exchange magnetos or will rebuild yours. Both of their info is on the "parts etc" page which has a link on the top right. Now here is a link that will show you how to test the spark on your mag and time it to your engine: http://www.worldpath.net/~thompson/acb/magtiming/magtiming.htm Here is a link that will break down the different codes for your FM Mag: http://www.oldengine.org/members/diesel/Magnetos/MagFMType.htm I am either not understanding or not familiar with the "K46" you had listed. Are they both FM mags? Some wicos mags are out there and some early FM mags had a different cap and mounting style...Here a picture is worth a thousand words. Again, I may not just be knowledgeable on the K46. If you decide that you have no spark and want to investigate yourself, you MIGHT have success just cleaning everything up. The last one I did for my IB just needed to be cleaned up and new points installed. Of course getting the ants nest out if it helped too. If you are certain that it is a FM J magneto, I have a couple of .pdf files that are copies of factory service manuals. Here is a link for a real detailed service procedure for the FM J. http://www204.pair.com/bbg46/FM%20Mag%20Manual/Magneto%20Service%20Practices(49-64).pdf Hope this helps. Ryan Edited by RyanTN - 30 Jan 2011 at 9:58pm