EE WAS TO CHECK COOLANT AND ENGINE OIL ON A 627E PAN. AFTER EE HAD COMPLETED BOTH CHECKS HE WENT TO DISMOUNT THE MACHINE ON THE RIGHT SIDE. THE STEP HAD BEEN PUSHED INTO A LOCKED UNSAFE POSITI ON. EE SOMMITTED TO STEP DOWN AND WITH NO STEP TO SUPPORT HIS BODY WEIGHT, HE WAS SUSPENDED BY HIS RIGHT ARM & SHOULDER THUS PULLING HIS RIGHT SHOULDER.