. SAFETY SAFETY MACHINE OPERATION SAFETY SAFETY MACHINE OPERATION ground. under the tracks to prevent the machine from moving. TRANSPORTATION 2 - 27 leavin positio n (L), then stop the e ngine Always close the o perator's cab d oor, and use th e ke y to l ock all the equipme nt in o rder to pr event any unauthorized p erso n from moving the machine. Alwa ys remove the key, t ake i t wit h you, and leave it i n the specified place If it is n ecessary t o park th e machine on a slope , always do as follows Put block