if still stock, you have to loosen all three pivot bolts, and an adjuster bolt on all the accessories. PS 13mm bolts with nuts on the front you have to hold. (that lower one is a pain to get to, don't break the fuel lines!) also, you might wanna remove the vacuum hose to keep from breaking off a nipple... then on the flat there is a 13mm adjuster bolt you have to loosen.
then the a/c bracket, it has three 19mm bolts on the back that have to be loosened, then the 10mm adjuster nut between the oil cooler hoses... on the bracket the a/c is bolted to.
then and only then can you get to the alternator bolts, which are 17mm, and there are three that are loosened from the back. and the 13mm nut that goes on the weird dual bolt thing that substitutes for an belt adjuster...

__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 560SL convertible
1987 190D 2.5-5SPEED!!!

1987 300TD
2005 Dodge Sprinter 2500 158"WB
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!