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Farmall & IHC Tractors Discussion Board

Re: 12 volt Alternator


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Posted by Bob M on August 12, 2002 at 09:59:45 from (165.170.128.66):

In Reply to: 12 volt Alternator posted by Hal Davis on August 12, 2002 at 09:03:27:

The Delco 10SI was used on most domestically built GM cars and PU's from 1975 thru the late 80's. Be aware however some large GM cars equipped with A/C and power accessories were supplied with the 15SI. This is electrically similar, but has a higher output rating and is physically larger - hence more difficult to squeeze under a Farmall hood.

Quick way distinguish a 10SI from a 15SI: Check the alternator output rating stamped into the alternator case. If it's 63 amps or less, it's a 10 SI. If 70 amps or higher it's a 15SI or other, later model.

Incidentally the advice below to get the smallest diameter pulley you can find is right on!!


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