European 1974 350SLC ,'78 300CD& '80 300CD sold , '81 240D SWMBO's Car '84 300CD & Euro
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980 Posts
I see you didn't bother to clean the copper slip rings in the alternator and this can prevent charging .
To clean slack or remove the drive belt and use metal polish and a clean rag, turn the armature as you get golden color on the slip rings ..Another thing is : it's very easy to install the voltage regulator so the brushes are not sitting squarely on the slip rings .
HELLA is just as good as BOSCH , beware of any other brands, many are made in Germany but never quite reach 14 VDC .
If the bent is slipping it's east to tell by trying ti turn the alternator by the fan blades behind the pulley ~ if it turns with no sound it's slipping .
It you can force it to turn with a squeaking sound the belt isn't tight enough .
If you decide to replace it, ONLY a BOSCH branded & labeled rebuild will do ~ other companies fail to properly varnish the armature windings to they often fail .
The 65 ampere W123 alternator is only on the 1985 year models in the U.S.A. , again, BE WARY of whom you buy from .
Most breakers will have at least one 65 ampere W123 alternator, the BOSCH part number is : AL117X and it will ave that number on a sticker on the side of the alternator if it's a proper BOSCH rebuild .
Most places will sell you a generic one that look the same but at most is 55 amperes .
To clean slack or remove the drive belt and use metal polish and a clean rag, turn the armature as you get golden color on the slip rings ..Another thing is : it's very easy to install the voltage regulator so the brushes are not sitting squarely on the slip rings .
HELLA is just as good as BOSCH , beware of any other brands, many are made in Germany but never quite reach 14 VDC .
If the bent is slipping it's east to tell by trying ti turn the alternator by the fan blades behind the pulley ~ if it turns with no sound it's slipping .
It you can force it to turn with a squeaking sound the belt isn't tight enough .
If you decide to replace it, ONLY a BOSCH branded & labeled rebuild will do ~ other companies fail to properly varnish the armature windings to they often fail .
The 65 ampere W123 alternator is only on the 1985 year models in the U.S.A. , again, BE WARY of whom you buy from .
Most breakers will have at least one 65 ampere W123 alternator, the BOSCH part number is : AL117X and it will ave that number on a sticker on the side of the alternator if it's a proper BOSCH rebuild .
Most places will sell you a generic one that look the same but at most is 55 amperes .