EE WAS USING A PIPE WRENCH TO TURN A JACKSHAFT AT THE JAW TO PUT A BELT BACK ON. THE PIPE WRENCHSLIPPED OFF OF THE SHAFT AND THE EE WAS ATTEMPTING TO PUT THE WRENCH BACK ON WHEN THE COUNTERWEI GHT ROLLED SLIGHTLY CATCHING THE EE'S FINGER BETWEEN WRENCH AND A GUARD CAUSING A LACERATION.