Here is my old alternator with the shiny new voltage regulator that did no good.
The old alternator dropped out the bottom with the adjuster bracket still attached.
The bracket and bolt were bent from people in the past not having all the nuts and bolts loose before adjusting the belt tension.
The 80 amp alternator is on the left, and the old 55 amp alternator is on the right. The body and hole spacing of the 80 amp alternator is slightly bigger than the 55 amp version. The electrical connections and voltage regulator are also in different positions between the types.
They are close to the same depth, but the 80 amp one is a little deeper.
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DON'T MESS WITH MY MERCEDES!
1967 W110 Universal Wagon, Euro, Turbo Diesel, Tail Fins, 4 Speed Manual Column Shift, A/C
1980 W116 300SD Turbo Diesel, DB479 Walnut Brown, Sunroof, Highly Optioned, 350,000+ Miles