ENGINE BRAKE SYSTEM operating the progressive braking switch. Always go from OFF to LOW and then to a higher position when on slippery roads. NOTE: On single trailers or combinations, a light air application of the trailer brakes may be desirable to help keep the trailer stretched out. Follow the manufacturer's recommended operating procedure when using your trailer brakes. Driving on Wet or Slippery Pavement Do not attempt to use the engine brake system on wet or slippery roads until you have some experience with it on dry pavement. On wet or slippery pavement, start with the master switch in the OFF position and use the gear you would normally use under these conditions.
If the vehicle is maintaining traction, place the selective braking switch in the LOW position and turn ON the engine brake system. If the drive wheels are maintaining traction and you desire greater slowing power, move the braking switch to the next highest position. LOSS OF VEHICLE CONTROL To avoid injury from loss of vehicle control, do not activate the Engine Brake system under the following conditions: On wet or slippery pavement, unless the vehicle is equipped with ABS (anti-lock braking system) and you have had prior experience driving under these conditions.
However, if the tractor drive wheels begin to lock or there is a fishtail motion, turn the engine brake system OFF immediately and do not activate it until road conditions improve. Check your progressive braking switch often for proper position, since road conditions can change quickly. Never skip a step when operating the progressive braking system. Always go from OFF to LOW and then to a higher position. When driving without a trailer (bobtailing) or pulling an empty trailer. If the tractor drive wheels begin to lock or there is fishtail motion after the Engine Brake is activated, deactivate the brake system immediately if this occurs. 58 All information subject to change without notice.
(Rev. 04/08) DDC-SVC-MAN-0040 0704 Copyright © 2008 DETROIT DIESEL CORPORATION