EE WAS LOADING HYDRAULIC HOSE ON MANTRIP. ONE END OF THE HOSE WAS UNDER A PIECE OF METAL THAT THE MANTRIP TIRE WAS SITTING ON. THE MANTRIP COULD NOT BE MOVED SO EE PULLED ON HOSE TO GET IT OU T FROM UNDER THE METAL. STRAINED LOWER LEFT BACK. FIRST DAY MISSED 8-12-00.