THE EE WAS TRYING TO REMOVE BEARING HOUSING FROM THE FINISH MILL 2 FK PUMP WITH HYD. PULLER. THE PULLER WAS SUSPENDED WITH A NYLON SLING FROM THE FORKLIFT. FORCE WAS APPLIED TO THE PULLER VIA ELECTRIC PUMP. THE HOUSING FRACTURED & THE PULLER BROKE LOOSE UNDER TENSION. THE RELEASE OF PRESSURE CAUSED THE PULLER TO FLY IN AN ARCH, STRIKING THE EE IN THE RIGHT SHIN (TIBIA).