it all depends what got trashed as the old clutch fell off and what part fell off, if the face plate fell off that's not a huge deal, the flat springs that hold the contact ring to the hub frequently break on sanden compressors, one of the bitch parts will be getting the hub/face plate off the shaft, most sandens hold onto their plates fairly hard, i made a slide hammer attachment to pull them off using the 3 threaded holes, i made another to pull it off like a steering wheel puller when i don't have free access to the front, if the pulley let go it probably trashed something on the way off, sometimes it will break the snap ring groove off the snout, sometimes the bearing will lock up and grind down the snout so that a new bearing won't fit snug, penitrating oil and care gets the pulley off, you can use a 3 jaw puller on it but if you pull too hard you can tear up or bend the pulley which will **** the belt
all america wants is cold beer warm cat and a place to take a poop with a door on it