The early 1934 Allis Chalmers WC came with a base mount Bendix-Scintilla Type C-4 magneto.
Through auctions and eBay, I have been able to get four Bendix mags, two of which are Type C-4,
and one which has the all-important distributor cap. All of them were stuck and would not turn.
Upon opening the two with coils I found the coils were no good, also the leaking tar from the coils was the reason two of the mags wouldn't turn.
The condensers still in a couple of them also tested bad. Two had points that looked like they could be cleaned up.
After cleaning the tar from around the rotor I was able to get two of them to turn. I temporarily attached a Fairbanks Morse FMJ coil and condenser to one.
I took a video of the results, still a long way to go but there is spark
See the video of it spinning
on the test stand.
I made a set of new wires and attached them to the cap, still with an FMJ coil
Here we see a hot spark on number two
With the cap off we see the new FMJ coil and the cleaned-up rotor
After using it for the 2013 show I got a proper coil. It is a rewound one which is best;
I've heard there are no good original coils for these since the sealant they used
cracked with age breaking the thin wires in the high-tension windings.
This coil also has tabs that eliminate the wire that was added to make the connection from the points to the coil
The points assembly can be easily removed.
With a proper coil I can use the brass shut-off switch I had on one of my parts mags.
The WC used a shut off button on the Bendix magneto
Seen from the inside button released
and with button pressed
