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#1
10-29-2011, 08:28 PM
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Alternator
On a typical Bosh alternator (70s, 80s), is it normal to have just a little bit of solder on the edges of each side of the commutator (the part upon which the brushes ride)?
The brushes are not riding on the solder. Also, the bearings seem fine and yet a slight clunking can be felt when you turn the pully by hand. Is this normal? Itīs a newly rebuilt alternator.
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 Don't Chrome them; polish them 
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#2
10-29-2011, 11:34 PM
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"Klunking"
NOT GOOD,especially with "Hand Turning"!
Under Load there's much more stress...And thousands of RPMs. The "Solder" is probably the result of refitting new "Slip Rings" on the Shaft. The "Brushes" ride on the "Slip Rings" which are a "Maintenance" item. The real question is did the ReBuilder "True Up" the New Slip Rings on a Lathe? (Or even replace the Bearings?) [Klunk,Klunk] Typical "Big Box" type [Autozone,Advance ,Pep Boys,Etc.) "Reman" supplier is a "Spray and Pray" operation.They clean and spray paint the Alternator... Then Pray it works for the length of the warranty. Two different approaches to Bosch rebuilding: 1.Total Reman: Oichan's Corrado Alternator Rebuild. 2.Bearings: Alternator Bearing Replacement in a W140 Mercedes Wagner Alternator will have ALL the Parts you need: Wagner Alternator and Supplies, Inc.
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'84 300SD sold 124.128 Last edited by compress ignite; 10-30-2011 at 02:19 AM.
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#3
10-30-2011, 12:15 AM
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Should spin pretty quiet. I suspect a bad rebuild. I've seen some pretty useless "reman" parts. Almost as if they put it in a parts washer and painted it, sneezed some grease in it, and slapped a shiny "remanufactured" sticker on it.
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http://i193.photobucket.com/albums/z...-RESIZED-1.jpg 1991 300E - 212K and rising fast...
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#4
10-30-2011, 05:45 PM
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You guys have confirmed my suspicions. Thanks
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Don't Chrome them; polish them
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