ENGINE OPERATION - Operating Instructions Operating on Grades and Dry Pavement Do Not Exceed Governed Engine Speed 1 CAUTION Tips for driving on grades and dry roads. The engine ECM maintains a record of maximum rpm. Exceeding the maxi- mum rpm will be considered driver abuse and will affect the engine war- ranty. See Engine Spcifications. WARNING The engine brake is not intended as the primary brake for the vehicle, nor is it an emergency brake. The service brakes must be used in an emergency. Relying solely on the engine brake to stop the vehicle in an emergency could cause an accident and lead to personal injury.
The engine brake only helps the service brakes by using pressure to slow the drive train. You must use the service brakes for quick or emergency stops. Failure to comply may result in death, personal injury, equipment or property damage. WARNING DO NOT use an exhaust brake when driving bobtail or with an unloaded trailer. There may not be enough weight on the rear axle to provide trac- tion. This could cause a loss of control and jackknife resulting in an injury ac- cident. Make sure the exhaust brake is switched “OFF” when bobtailing or with an unloaded trailer. Failure to comply may result in death, personal injury, equipment or property damage.
WARNING DO NOT use the engine brake when operating on road surfaces with poor traction (such as wet, icy, or snow cov- ered roads or gravel). Retarders can cause the wheels to skid on a slippery surface. You could lose control of the vehicle and/or jackknife if the wheels begin to skid, resulting in an accident. Failure to comply may result in death, personal injury, equipment or property damage. "Control speed" is the speed at which the forces pushing a vehicle down a grade are equal to the forces holding it back. Y53-1183-1E1 (04/16/18) 29 30 4050 1 3 5 20 60 10 87 00 2 24 10R 0 MPH 0 OK RPM 30 4050 1 3 5 20 60 10 0 MPH 87 00 2 4 230R 0 OK RPM