A 3. Unlock the park brake (A). MX7694 4. Try to start engine. Result: Engine must not start. If engine starts, there is a problem with your safety interlock circuit. Testing Park Brake 1. Park machine safely. (See Parking Safely in the SAFETY Section.) A 2. Lock the park brake (A). MX7694 3. Put transmission in neutral. Engage free-wheeling lever on units with an automatic transmission. Testing Park Brake Switch 1. Park machine safely. (See Parking Safely in the SAFETY Section.) 4. Try to push machine manually. Result: Park brake must prevent machine from moving. If machine moves, parking brake needs to be adjusted. 2. Sit on seat. Testing PTO Switch 1. Park machine safely.
(See Parking Safely in the SAFETY Section.) 2. Sit on seat. Operating - 15 O Testing Safety Systems c CAUTION: Avoid injury! Engine exhaust fumes contain carbon monoxide and can cause serious illness or death. Move the vehicle to an outside area before running the engine. Do not run an engine in an enclosed area without adequate ventilation. • Connect a pipe extension to the engine exhaust pipe to direct the exhaust fumes out of the area. • Allow fresh outside air into the work area to clear the exhaust fumes out. f o Use the following checkout procedure to check for norma operation of machine. If there is a malfunction during one of these procedures, D not operate machine.
See your John Deere dealer for service. Perform these tests in a clear open area. Keep bystande away.