ENGINE OPERATION - Operating Instructions the brake is ON (ready to slow the vehicle down) or OFF (no braking action). 1. Do not use the engine compression brake to slow the vehicle down when you are bobtailing or pulling an empty trailer. 2. Make sure the brake is OFF before starting the engine. 3. After the engine is started, warmed up and you are ready to get under way, turn the engine compression brake switch ON for added braking effect. 1 WARNING warm the engine before activating the engine brakes. The service brakes must be used in an emergency. The engine compression brake alone might not stop the vehicle fast enough to prevent an accident.
The engine compression brake is NOT intended as the primary brake for the vehicle, nor is it an emergency brake. The engine compression brake only helps the service brakes by using en- gine back pressure to slow the drive- train. Use the service brakes for quick stops. You could be seriously injured if you relied only on the engine compres- sion brake to stop the vehicle in an emergency. Failure to comply may re- sult in death, personal injury, equip- ment or property damage. NOTE If your vehicle is equipped with anti- lock brakes (ABS), operation of the compression brake (if turned ON) may be interrupted if the ABS system de- tects wheel-slip due to operation on slippery surfaces.
Ideally (on normal road surfaces), you should slow your vehicle with the compression brake (where permitted by law) and use the service brakes only for stopping completely. Operating this way will greatly prolong the life of the service brakes. NOTE If your vehicle is equipped with the Ea- ton Vorad® system, operation of the compression brake may be automati- cally activated. CAUTION Compression Brake Proper use of engine compression brakes. Compression Brake Controls Using the compression brake controls. DO NOT operate the engine brake un- til the engine oil temperature is above 86°F (30°C). Operation below 86°F (30°C) could cause severe damage to the engine.
Idle the engine four mi- nutes at approximately 1000 rpm to With the compression brake switch ON, the brake automatically creates its braking effect when you remove your foot from the accelerator pedal. The brake switch is located on the accessory dash panel. It controls whether There are two switches on the dash panel that control the engine compression brake. A master switch turns the system ON or OFF. A second switch, located next to the master switch, controls the braking effect. This switch allows you to choose Y53-1181-1K1 (08/2018) 17