Alternator

55 50 Ron · Sep 10, 2019

I'm not an expert at identifying particular alternators. This is obviously a Delco Remy but which model? It's on a 4020 diesel. Thanks.

CRracer712 · Sep 10, 2019

When I was a teenager working in an auto parts store, seems like I recall those GM alternators having numbers stamped on the side, usually in that wider smooth area, that identified the alternator and it's output ability.

Bob · Sep 10, 2019

It's a Delco 10SI.

If you are looking for a generic replacement, GOOGLE "7127 alternator". The suffix numbers that will come up indicate the "clock" position of the terminals.

Glen D Anderson · Sep 11, 2019

To add to Bob's comments, here is a link to a website that provides a fair bit of good info. on the Delco 10 & 12 SI alternators: http://www.madelectrical.com/electricaltech/delcoremy.shtml

FWIW, we are running the 94 amp, 12SI on all of our tractors. Napa P/N 213 - 4356. Highest amp. rating in the 10/12 SI frame, reasonably priced, & most importantly, lifetime warranty.

Alternator

55 50 Ron

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CRracer712

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Bob

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Glen D Anderson

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