Dismantling Antique Tractor Magnetos

A guide to non-destructive dismantling and magneto restoration from a master of old tractor electronics

Brass hammer
Neil Yerigan's favorite brass hammer. A brass or other non-magnetic hammer is needed to work on magnetos. Brass drifts are also handy since they are not detected or attracted by magnetism. If you try to tap a freshly magnetized horseshoe magnet into place with a steel hammer you will see what I mean. I have to de-magnetize screwdrivers and pliers on a regular basis, which is trouble enough. 
Photo Courtesy Octane Press