EMPLOYEE AND CO-WORKER WERE RAISING THE LEG JACKON THE #2 SHIELD TO CLEAN-OUT WHERE THE BOTTOM LEG RETAINER COULD BE REPLACED. COMEALONGS WERE ATTACHED TO LEG JACK WHILE HYDRAULIC PRESSURE WAS APPLIED THE HOOK BENT CAUSING THE COMEALONG TO HIT EMPLOYEE. THE COMEALONG WAS INSTALLED AT WRONG ANGLE.