EE CLIMBED INTO THE FRONT END LOADER TO START AND WARM IT. THE KEYS WERE NOT IN THE LOADER SO HE CLIMBED OUT TO GET THEM. A HYDRAULIC LEAK IN THE CAB FROM THE CONTROL CONSOLE HAD SATURATED THE FLOOR AND WITH OIL ON HIS SHOES HE SLIPPED WHILE DESCENDING THE STEPS AND PULLED HIS LOWER RIGHT CALF MUSCLE.