Alternator ID

[Marc R.]

I have an AC/Delco alternator stamped 1102410; 2C14; 12V NFO. I'd like to know what it was built for.

[Eric J.]

Re: Alternator ID

Marc, I checked my parts book and can not find it listed as a Corvette Alt at least until 72. I checked my Chevy parts book and did not find it listed up to 93. Perhaps a newer application or non Chevy part. Eric 3,182

[Joe L.]

Re: Alternator ID

Marc----

It's a 1972 model year-issued alternator and that fact is further confirmed by the date coding. So, it's very likely that this was a PRODUCTION alternator rather than SERVICE. That's almost how it has to be, anyway, since I can find no record that the 1102410 was ever available in SERVICE.

I cannot find an application for it. I can tell you that it was not used in any GM passenger car or truck in the 72+ period. The "NFO" embossment is quite strange, too. There should be an amp rating. It may be that this alternator was originally part of an industrial engine assembly or, possibly, even a military application.

[Marc R.]

Re: Alternator ID

Joe,
There seems to be a gouge that might obliterate that area. It certainly looks much like the 'correct' '69 alternator pictures recently posted. The back is identical to the pictures. The front may not be as 'open' as the pictures, but it's close. Thank you.

[Joe L.]

Re: Alternator ID

Marc-----

1972 would not have used the 69-style or 70 style split ring (rear) case half. However, it's VERY possible that the split ring case half on it now is not the one that was originally mated with the drive end case. That's a virtual certainty if the alternator has ever been through a commercial rebuilding operation.

If you can, please post photos of the drive end and split ring end case halves. If you can't post them but can e-mail them, e-mail them to me and I'll post them for you.

[Michael B.]

Re: Alternator ID

I couldn't find a 1102410 number in my books either. While I was scouting around I found some GM numbers from my December 83 catalog.

My bet is that 12V NFO is actually 12V NEG

1852101 FRAME, Generator Slip Ring 69 with 1100825-33-59-82
(also listed for 70-71)

1974937 FRAME, Generator Drive End 62-82 37 thru 63 Amp

Since these are service parts would they be stamped with the service part number or would they be blank?

Just for giggles here is another good pic of the front of a 1100884.

[Joe L.]

Re: Alternator ID

Mike-----

The same case halves are used for PRODUCTION as well as SERVICE. I have found that some case halves will have a part number embossed inside, but most do not evidence any embossed part number---it really makes research difficult.

GM #1852101 is a much later PRODUCTION and SERVICE split ring end frame. However, it is SERVICE for 1969 models. It is the "slot and round hole" design; there is no finned "heat sink". I have many in-the-box NOS examples of this frame.

GM #1974397 is also a much later drive end frame. However, it is SERVICE for 1969 and other earlier alternators. This frame is the "3 spoke CLOSED" design.

[Marc R.]

Re: Alternator ID

After your posts, I'm convinced this has been 'made' by some shop to resemble a Corvette alternator. The back looks ok but the front is not that open. Thanks to all.