FUELER FAILED TO PROPERLY PRE-TRIP UNIT AND HAD INADEQUATE BRAKES ON A GRADE. HE EASED THE UNIT INTO A MUDDY DITCH TO STOP. VEHICLE IMMEDIATELY INSPECTED AND FOUND TO HAVE NEW BRAKES THAT WERE OUT OF ADJUSTMENT. THE EMPLOYEE CONTINUED TO WORK BUT SOUGHT MEDICAL TREATMENT FOR ALLEGED INJURIES AFTER LEARNING OF PENDING DISCIPLINARY ACTION. THE COMPANY HAS BANNED HIM FROM THE PROPERTY