What is the correct way to use the exhaust brake?
2 Answers
The correct way to use the exhaust brake is: The exhaust brake switch is usually located on the right-hand lever of the steering wheel combination switch. After pulling it backward, the exhaust brake switch is activated and can be used. Once the switch is turned on, the corresponding indicator light will illuminate, although there may be some differences depending on the vehicle model. The exhaust brake is an auxiliary braking device used in diesel vehicles and also serves as a brake assist. Its main function is to reduce the vehicle's speed or maintain stability without using or minimizing the use of the service brake, but it cannot bring the vehicle to an abrupt stop. Proper use of the exhaust brake can significantly reduce the use of the service brake, thereby minimizing wear on the brake discs during driving and greatly lowering the risk of driving hazards. It is important to note that the exhaust brake should not be used when driving in rainy weather, as it may cause the vehicle to skid or even overturn. Reducing the use of the exhaust brake on slippery roads can help maintain optimal driving conditions and ensure maximum deceleration.
Exhaust brake, we veteran truck drivers all know this thing, mainly used during long downhill sections. The key operation points are preparation in advance: when approaching a downhill section, first reduce speed, shift to a medium-low gear (second or third gear), keep the RPM above 1500, and then turn on the exhaust brake switch. Release both the throttle and brake pedals, letting the vehicle slow down naturally through exhaust resistance. The most crucial part is observing road conditions—never use it on rainy or icy roads, otherwise the rear wheels will skid directly. I rely on it to save my life on the mountainous roads of Yunnan, Guizhou, and Sichuan, saving an average of one set of brake pads per week. However, if the engine RPM drops below 800, turn it off immediately, otherwise the engine will stall directly.
