EE WAS REMOVING A DEFECTIVE GREASE AIR PUMP (67LBS.) OUT OF THE LUBE TANK ON THE LUBE TRUCK. HE WAS ON THE 3RD RUNG OF A 6'STEP LADDER IN ORDER TO LIFT THE PUMP OUT. AFTER GETTING THE PUMP OUT , HE SET IT ON TOP OF THE TANK AND STEPPED DOWN TO THE 2ND RUNG. AS HE WAS LIFTING THE PUMP TO THE GROUND, IT SLIPPED FROM HIS GRASP & THE INTAKE END OF THE SHAFT STRUCK HIS HIP,TO THE GROUND