My first rebuild was a '51 DC like yours only in much worse shape. It was severely stuck. There are no new Case mag parts unless you are lucky to find some. My mags have all been nonworking when I got them. I prefer the model 41 over the JMA because the coils can be replaced easily and in a pinch you can get a fairbanks coil to work in them. I use an IH magneto condenser. It has a screw in the end. To get the rotor out the little screw on the back side of it must come out. Do not pull on the rotor! Disassemble and clean everything you can but do not remove the armature. Replace the small wires from the consenser to the points if the wire looks bad. Buy wire loops that fit the screws and solder them onto the wire. File the points to get rid of pits. finish them with fine emery paper. Reinstall all the point parts and gap at .010. Turn the mag so small gear with dot fits between the two shaved teeth on the rotor. Put back the lock screw. If the input coupling is good, it will click each time it fires when mag is in opereating position. Before you disassemble you can usually tell if the coil is good by observing a faint spark at the points when you turn it. Put cap back on with heavy coil wire inserted into cap. Put a test wire in number one hole and turn mag until spark jumps from end of test wire accross a 5/8" gap to mag case. A nice blue spark and it is ready to use. Turn engine to #1 firing position. Turn with a crank. Take out inspection plug on right side to see small hole in flywheel and center this in the inspection hole. Turn dogs on mag CLOCKWISE from drive end far enough to fit into mag drive on tractor and bolt in place. Firing order is #1,#3,#4, and #2. If it backfires when you crank it, it is a round out of time. Move #1 wire to #4 position on cap and clockwise install the remaining plug wires #3,#4,and #2. Your tractor should run smoothly. The carbon on the rotor should be cleaned off with a rubber pencil eraser and wiped clean with a cloth. Do not use ANYTHING else. This should make a dirty old mag work again.
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Today's Featured Article - Identifying Tractor Noises - by Curtis Von Fange. Listening To Your Tractor : Part 3 - In this series we are continuing to learn the fine art of listening to our tractor in hopes of keeping it running longer. One particularly important facet is to hear and identify the particular noises that our
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