EMPLOYEE WAS DOING HOUSEKEEPING IN AREA OF #7 BAGGER. HE FELT PAIN IN HIS LOWER BACK AS HE STEPPED UP ONTO FORKLIFT AND SAT DOWN. THERE IS NO STEP ON FORKLIFT AND SEAT CUSHION IS DETERIORATED AND WORN. THE HIGH STEP AND HARD SEAT MAY HAVE CONTRIBUTED TO EMPLOYEE'S BACK STRAIN.