EE AS FUELING 848 CAT DOZER HE STEPPED ONTO THE DOZER PUSHARM WITH THE FUEL HOSE IN HIS HAND. ASHE MADE THE STEP, HE FELT SOMETING POP IN HIS LEFT KNEE. HE FINISHED FUELING THE CAT & PARKED TH E SERVICE TRUCK HE REPORTED INJURY TO HIS IMMEDIATE SUPERVISOR HE DID NOT SEEK MED TREAMENT HE COMPLETED HIS SHIFT & HAS NOT MISSED WORK