How to tell alternators apart?

[DeWitt Harrison]

The mount style is the positive giveaway.

The basic arrangement is a knuckle joint: a hinge
having a single projection with a hole on one piece (male)
which fits into a gap between two corresponding
projections (female) on the second piece and retained
by a bolt or bolts. The 90A alternator case has the male
portion of this joint and a single hinge pin through-bolt.
The 110A alternator case comprises the female portion
of the hinge and there are two bolts. The mounting
brackets for each type are of the respective opposite
persuasions.

DeWitt Harrison
88 5kcstq


On Wed, 20 Mar 2002 21:36:38 -0700,
    Al Powell <powellae at attbi.com> wrote:

> Hey friends, I'm thinking that at 165K miles, I ought to have a spare
brush
> pack handy for the alternator in my 1990 200.  I am advised by the parts
gent
> here that there were 90 amp and 100 amp versions on the 200...and I can't
> find any visible label or clue that's still readable on the alternator.
>
> Can anyone advise me on whether there's a way to tell which alternator I
have
> from visual evidence??