ENGINE OPERATION - Operating Instructions 1 Operating on Level and Dry Pavement For operation on dry and relatively flat surfaces, when greater retarding power is not required, put the two-position selector switch in the "LOW" position. caused by the normal operation of the engine compression brake could cause you to lose control of the vehi- cle, resulting in an injury accident. Make sure the engine brake is switch- ed "OFF" when bobtailing or with an unloaded trailer. Failure to comply may result in death, personal injury, equip- ment or property damage. Tips for driving on level and dry roads.
WARNING For operation on dry pavement when maximum retarding power is required, put the three-position selector switch in the "HI" position. 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.
Remove Foot from Accelerator WARNING DO NOT operate the engine compres- sion brake when driving/operating your vehicle bobtail or with a loaded or un- loaded trailer on road surfaces with poor traction (wet, icy, or snow cov- ered roads) or in heavy traffic. There may not be enough weight on the rear axle to provide traction. Braking To reduce vehicle speed, put the engine brake ON/OFF switch in the "ON" position. Remove your foot from the accelerator pedal and clutch pedal. The engine brakes will immediately begin to operate, slowing the vehicle. 28 Y53-1183-1E1 (04/16/18) 30 40 50 20 60 10 70 0 MPH 80