. SAFETY PRECAUTIONS FOR MAINTENANCE STOP ENGINE BEFORE CARRYING OUT INSPECTION AND MAINTENANCE 2 - 28 Stop t he machine on f irm, level ground. Select a place where no hazar rocks, or flooding. Lower the wor quipmen the engine After the quipmen lever t o the RAISE an d LOWER positions 2 or 3 times to release the pressure remainin g in t he hydraulic ci rcuit, then set the work equipment lock lever a nd Parking brake l ever t o LOCK position. Put blocks under t he t rack to prevent the machine from moving.