Stan W. Posted February 3, 2021 Share Posted February 3, 2021 Does anyone know the amp rating of the 1985 Lesabre Limited with the 307 engine? I want to rebuild the alternator but I don't know what rectifier to buy. I believe it would be the 94 amp version, but I see there is also a 108 amp model. Thanks Link to comment Share on other sites More sharing options...
NTX5467 Posted February 4, 2021 Share Posted February 4, 2021 (edited) If the alternator is original to the car, there might be a stamping of the output near the "stamp number" on the alternator case. Usually, it's the brushes, diode trio, and voltage regulator that needs replacement, rather than the rectifier bridge, by observation. What issues are motivating this desire to rebuild? Seems like there are some significant visual differences in those two alternators? Even pulley diameter, too? Look inside the trunk (either on the bottom side of the trunk lid or on the top of the spare tire cover board, if the spare is in a recessed place) for the Service Parts ID (SPID) label. It might have a code for the alternator in that bunch of alphanumeric codes. Just some thoughts, NTX5467 Edited February 4, 2021 by NTX5467 (see edit history) Link to comment Share on other sites More sharing options...
Stan W. Posted February 4, 2021 Author Share Posted February 4, 2021 Quote Thanks for the reply. The dash light comes on sometmes. I've had the car about 15 years and thought I would just put in new bearings and some internal parts. I'll look at it and see if there are some numbers on it. Link to comment Share on other sites More sharing options...
Frank DuVal Posted February 4, 2021 Share Posted February 4, 2021 Bearings and brushes (brush holder also in some cases). Skip the diodes. they do not go intermittent, usually! You know the paper clip trick for reassembly? Link to comment Share on other sites More sharing options...
avgwarhawk Posted February 4, 2021 Share Posted February 4, 2021 As stated, the alt should have the amp rating stamped on it. Link to comment Share on other sites More sharing options...
Stan W. Posted February 4, 2021 Author Share Posted February 4, 2021 Thanks everyone for the help. Frank,I do know that trick for setting the brushes. Link to comment Share on other sites More sharing options...
Marty Roth Posted February 9, 2021 Share Posted February 9, 2021 On 2/4/2021 at 11:35 AM, Frank DuVal said: Bearings and brushes (brush holder also in some cases). Skip the diodes. they do not go intermittent, usually! You know the paper clip trick for reassembly? Frank, For those of us who have forgotten the paperclip trick, please provide the detail methodology. Thanks Link to comment Share on other sites More sharing options...
NTX5467 Posted February 9, 2021 Share Posted February 9, 2021 As I recall, most new brush holders have a plastic dowel inserted to keep the brushes retracted until they are installed. Then "pull it out" and you're ready to go. Otherwise, you can manually push the brushes back into their holder, insert a "paper clip" to hold them in place (retracted) for safe keeping until they are ready to be reinstalled (IF they are worth re-installing). NTX5467 1 Link to comment Share on other sites More sharing options...
Frank DuVal Posted February 11, 2021 Share Posted February 11, 2021 Right! There is a hole through the back of the alternator that lines up with holes in the brush holder. You install the brush holder onto the alternator back, push the brushes into the holder against spring pressure, insert a paper clip or toothpick into the hole, assemble halves of the alternator, then pull out the toothpick/paperclip. 1 Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now