Re: Farmall M - Converting to Alternator and/or El

Posted by texp on September 26, 2006 at 21:26:13 from (67.54.156.125):

In Reply to: Farmall M - Converting to Alternator and/or Electr posted by David Hazelwood - TN on September 26, 2006 at 20:55:08:

In order to convert a 6 volt positive ground to a 12 volt with an alternator you must do all of the following:
1. Install a GM single-wire 12 v alternator. The tractor will need to be changed to negative ground - this means swapping the battery cables.
2. Change light bulbs to 12 volt bulbs - I suppose you could place a resister in series, but changing bulbs is cleaner.
3. Replace the coil with a true 12-volt coil OR, wire a ballast resister (Chrysler used them for years) in series with the current coil AFTER swapping the positive and negative terminals on the coil.
4. The starter will work fine - so will the amp guage.
5. The GM alternator has a built-in regulator.
6. If the alternator drains the battery (when not running) you need to install a diode to keep from a back-feed. An alternator shop can sell you one for a couple of bucks, typically it is built in to a plug that goes from the alternator to the ignition switch. The alternator shop can help you with the "how-to" for the diode.

That's it, Cross your fingers and "start 'er up"
Texp

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