Re: Alternator on a Farmall MD

Posted by Bob M on October 13, 2005 at 12:47:20 from (151.190.254.107):

In Reply to: Alternator on a Farmall MD posted by Brad in WI on October 13, 2005 at 11:46:02:

Brad - You can convert your existing alternator yourself. Simply swap the existing regulator inside the alternator for a "single wire" regulator. Your local starter/alternator shop should have the regulator.

Be aware however when single wired an alternator will need to be spun up to higher RPM at startup to get it to begin charging. On a slow turning engine like the MD you may find you'll have to change to a smaller pulley to make the alternator spin fast enough to energize at startup.

A simpler option may be to stick with the 3 wire setup and install a normally open oil pressure switch on the engine (switch contacts close on dectecting oil pressure). Run a wire from the alternator BAT terminal, through the pressure switch, and back to the alternator #2 terminal and you'll be good to go.

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