How to Properly Use the Exhaust Brake?

[PrestonFitz]

Correct steps for using the exhaust brake: 1. Activate the right-hand lever on the steering wheel combination switch by pulling it backward; 2. Turn on the exhaust brake switch, and the corresponding indicator light will illuminate. The exhaust brake is an auxiliary braking device designed to reduce or maintain vehicle speed without relying on or minimizing the use of the service brake, though it cannot bring the vehicle to an emergency stop. Precautions for using the exhaust brake: 1. Avoid using the exhaust brake on icy or slippery roads, as it may cause wheel slip or skidding; 2. The exhaust brake is an auxiliary braking system and cannot replace the service brake for emergency braking or be used as a parking brake, but it can be used simultaneously with the service brake; 3. When using the exhaust brake on long downhill slopes, select an appropriate gear to keep the engine speed between 1600 to 2400 rpm.

[Jasper]

I always drive big trucks, and the exhaust brake is my secret weapon for saving the brakes, especially when going down long slopes. The operation is simple: when the speed is appropriate before the top of the slope, press the exhaust brake switch, and you can hear the engine sound become muffled as the truck starts to slow down smoothly. This is all thanks to it limiting the exhaust resistance. I never activate it right at the start of the climb, as the engine load would be too heavy and prone to overheating, which could cause problems instead. I also avoid using it on slippery roads because the wheels might skid and lose control. It's safest to use it together with the foot brake, like slowing down a bit before a turn, which also helps protect the brake pads from excessive wear. Remember to turn it off immediately after descending the slope—don’t leave it on while the engine is idling. After using it correctly, my truck requires less maintenance, saves some fuel, and gives me more peace of mind while driving.

[McMia]

As a car owner, my experience learning about the exhaust brake was quite interesting. At first, I didn't know about it. During my first steep downhill drive in the mountains, I was so nervous that I kept pressing the brake pedal, almost burning out the brake pads. Later, a friend taught me to gently press the exhaust brake button when approaching a slope with stable speed—the engine would help slow down the car, feeling like a resistance pushing from behind to decelerate. Don't use it randomly on uphill or flat roads; it's a waste of time and might harm the vehicle. Especially in summer when the engine is hot, keeping the exhaust brake on for too long can trigger an overheating alarm. Now I know to test its sensitivity after each start to ensure it works properly before driving. Safety first—it's best used in combination with other braking systems.

[SanRobert]

I believe the core of the exhaust brake is safe driving. Activating it before descending steep slopes can effectively assist the main braking system, preventing frequent use of the foot brake that may lead to overheating and failure. The key to operation lies in timing: activate it when the vehicle speed is steadily decreasing, as it's ineffective if used too early or too late; avoid using it in congested traffic or on flat roads to prevent wasting engine performance. I always make sure to turn it off during rainy or icy conditions to prevent wheel lock-up. It works even better when paired with lower transmission gears, allowing the engine to decelerate naturally and continuously, resulting in smoother driving.