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Re: Farmall M 6v to 12 v conversion kit
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Posted by F-Dean on June 09, 2006 at 20:32:55 from (67.72.98.93):
In Reply to: Farmall M 6v to 12 v conversion kit posted by Jeremy Landon on June 09, 2006 at 17:27:09:
Jou do not need a wiring kit. Just 10 feet of 10-guage wire. It is very straight-forward. BIG JOHN has been putting a Hitachi #14231 alternator on several tractors in place of a generator under the hood. This alternator was used on 1978-79 Nissan 620 pickup with a 2 liter engine and a 1980 Nissan 720 pickup with a 2 liter engine. At NAPA it is part #2138130. The cost of a rebuilt alternator is approximately $50 + core (And they won’t take a generator as a core). The alternator is 4 1/2" in diameter and 7" in length and will go right on the original mountings on the tractor. Use an 8" x 3/8" bolt and some pipe for spacers. Being Hitachi means that it is METRIC. You will need to drill out the mountings to 3/8". The tension adjusting bolt is also metric thread. The alternator is a three (3) wire set up which can be converted to one (1) wire. There are spade connections labeled S & L and a BAT post connection. The L spade is for the idiot light and can be disregarded. Use a jumper wire from the S spade to the BAT post and you are good to go. The pulley may be a split type that you can widen using a spacer (once again metric). If it is a split type, you will need to use a disc type lock washer and some “Locktite” because there won't be room to reuse the split lock washer that comes with it. I put the washer between to parts of the pulley to make it fit the existing belt. There is a built in regulator and a resister to keep the battery from feeding back to the alternator. This is a sweet fit under the hood that he has used on H's, M's and W models, also Cubs and many others. I add the following from my experience: Be sure to switch the polarity of the battery to Negative ground to avoid damaging the Alternator. Consequently, you need to switch the wires on the coil, if you are using a coil. Use a plastic covered connection when you connect the jumper wire from the S spade On a Farmall M, turning the bracket upside-down will allow the alternator to fit nicely inside the hood using the existing generator belt.
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