Alternator Q's

[Tim Rogers]

Louis wrote:

> My alternator recently took a shit, and im replacing it.  The question I
have
> is that the threads that holds the pulley to the alternator can slide in and
> out (slightly).  Btw this is with the pulley off.  I told the guy and he
said
> that the pulley locates it.

I had the pulleys off 3 alternators in the last month.  I do not remember
either one having any play in the main shaft.  Two of these alts. had bad
bearings, BTW.  If the pulley were to locate the shaft axially, shouldn't
there be some sort of bearing on the outside of the shaft to keep the pulley
and alternator body from grinding themselves into oblivion?   There is not.
Is there any play with the pulley on?  Probably.
I'll bet you have bad bearings on your alternator.  That is what happened to
mine, but the power output loss was actually due to bad regulators.

Tim Rogers
-'93 NX2000 T-top (awaiting ignition system diagnosis, receiver of 4
alternators last month)
-'91 NX2000 SCCA ITS racer-to-be
-'75 Silverado tow vehicle