WHILE INSTALLING A NEW WIRE TERMINAL ON THE DIS-CONNECT SWITCH OF DOZER, EMPLOYEE BENT DOWN FOR BETTER POSITION. HIS RIGHT FOOT SLIPPED OFF THE EQUALIZER BAR SHIFTING HIS WEIGHT TO HIS LEFT KNEE. AT THIS TIME HE HEARD A POP IN HIS KNEE & EXPERIENCE EXTREME PAIN IN THE LEFT KNEE. HE WASSEEN IN FOLLOW UP CARE AND TAKEN OFF WORK.