WHILE ATTEMPTING TO TRACK THE OVERHEAD FEED BELT FOR THE WET PLANT, THE EMPLOYEE NOTICED A BUILD-UP ON THE FEED ROLLERS AND ATTEMPTED TO REMOVE THE BUILD-UP BY USING A LADDER OF THE SAFETY FEN CE TO SUPPORT HIMSELF WHILE USING A PUTTY KNIFE TO SCRAPE THE GUIDE PULLEY. CONVEYOR WAS RUNNING AND PULLED HIM IN.