ENGINE OPERATION - Operating Instructions 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. progressively stronger braking to slow the vehicle down. 1 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. Engine compression brake controls include:
ON/OFF switch Three-position selector switch Clutch switch Throttle sensor Service brake pressure switch Eaton Vorad® Anti-Lock Braking System 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 Engaging conditions for the engine compression brake: If your vehicle is equipped with the Eaton Vorad® system, oper- ation of the compression brake may be automatically activated. Engine speed must be above 1,000 rpm. Coolant temperature must be above 59°F (15°C). Proper use of engine compression brakes.
Compression Brake Compression Brake Controls Deactivation conditions for the engine compression brake: With the compression brake switch ON, the brake automatically creates its braking effect when you remove your foot from the accelerator pedal. Using the compression brake controls. 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 Accelerator pedal is depressed. Clutch pedal is depressed. Engine speed falls below 800 rpm. ABS control is active. ECM recognizes a system problem.
The brake switch is located on the accessory dash panel. It controls whether the brake is ON (ready to slow the vehicle down) or OFF (no braking action). Y53-1183-1E1 (04/16/18) 19