. SAFETY PRECAUTIONS FOR MAINTENANCE 2 - 31 STOP ENGINE BEFORE CARRYING OUT INSPECTION AND MAINTENANCE Stop the machine on firm, level ground. Select a place where hazar rocks, or flooding. of landslides, falling Lower the dump body , set dum p lever (1 ) to t he HOLD position, lock with dump lever lock knob (2), then stop the engine. witch PARKING and put blocks (3 ) unde r the t ires to preven t the machine from moving.