. SAFETY PRECAUTIONS FOR MAINTENANCE 2 - 27 STOP ENGINE BEFORE CARRYING OUT INSPECTION AND MAINTENANCE Stop the m achine on firm, le vel ground. Select a place wher e there is no hazard landslides , or of flooding if th e land is low. Lower the dump body and s top the engine. Set parkin g brake valve leve r to the PARKING position and put blocks (1) under the t ires to prevent the machine from moving.