What is the reason why the truck air pressure cannot exceed 6 bars?
2 Answers
There are many reasons why the air pressure stops increasing after reaching 6 bars. First, the air compressor may be too old to function properly, making it unable to exceed 6 bars. Second, there may be air leaks in the main air pipe between the air pump and the unloading valve. Third, there could be leaks in the air storage tank. Below are some related introductions about air pressure: 1. Introduction one: Air pressure refers to the tire pressure, which is the pressure of the air inside the tire. In car maintenance, the engine is the heart of the car, and its damage will lead to the end of the car's life. The tire pressure is the blood pressure of the car, and the level of tire pressure plays a crucial role in the car's performance and power. 2. Introduction two: Car tires are one of the important components of a car. They directly contact the road surface and work together with the car suspension to cushion the impact during driving, ensuring good ride comfort and smooth driving. They also ensure good adhesion between the wheels and the road surface, thereby improving the car's traction, braking, and off-road capability.
I've been driving heavy trucks for nearly twenty years, and the most common issue when air pressure can't reach 6 bar is either a system leak or an underperforming air compressor. Aging pipes with cracks, loose fittings, or air escaping through gaps will naturally prevent pressure from building up. If the compressor's belt is loose or its internals are worn, it may spin endlessly without delivering enough air. A stuck or faulty pressure regulator can also limit pressure buildup. My own truck once had a similar problem—during inspection, I first checked if the pressure gauge needle was fluctuating, indicating a leak, then listened for unusual noises near the belt. If the leak is hard to locate, applying soapy water to the pipes will reveal bubbles at the leak point. Insufficient air pressure affects brake response, so never push your luck—get it checked at a professional repair shop promptly. The air pressure system is the lifeline of your vehicle; regular maintenance and replacing worn parts can save you a lot of trouble.
