Freni
Brakes are the safety system that slows and stops a commercial vehicle by converting its motion into heat through friction. A truck or bus brake system combines several parts, including friction material such as pads or shoes, the disc or drum they act on, hydraulic cylinders, and wear sensors. This category groups those components so the right part can be found for each model.
When the driver applies the brakes, the system forces friction material against a rotating disc or the inside of a drum, and the friction slows the vehicle. Heavier trucks commonly use air brakes, where compressed air acts through chambers, slack adjusters, and S-cams to apply the shoes. Lighter vehicles and clutch systems use hydraulic cylinders that turn pedal effort into fluid pressure. Both designs multiply a small input into the large force needed to stop a loaded vehicle.
Friction material, discs, and drums all wear with use, and seals and cylinders can leak or corrode over time. Common signs include reduced braking response, noise such as squealing or grinding, vibration, a warning light, or a change in pedal feel. Because braking is safety critical, the system should be inspected on a regular schedule and serviced by a qualified technician, with parts on the same axle replaced together to keep braking balanced.
The right brake part depends on the vehicle model, axle position, and the type of brake system, whether air or hydraulic and disc or drum. Use the categories below to find the specific component, and confirm each part against the vehicle specification before fitting.
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Frequently asked questions
What types of brake systems do commercial vehicles use?
Heavier trucks mostly use air brakes, while lighter vehicles use hydraulic brakes. Vehicles also combine disc and drum brakes, often disc on the steer axle and drum on the drive and trailer axles.
How often should commercial vehicle brakes be inspected?
On a regular preventive maintenance schedule, with the interval depending on load and use. A qualified technician should measure wear and check the system.
What is brake fade?
It is a temporary loss of braking power when the brakes overheat, often from heavy or repeated use such as a long descent. Letting the brakes cool and using engine braking can help reduce it.
What is the difference between disc and drum brakes?
Disc brakes dissipate heat better and perform well in wet conditions, while drum brakes hold heavy loads well, work well as parking brakes, and cost less. Many trucks use both.
What should I do if the brake warning light comes on?
Have the brakes inspected without delay. It can indicate worn friction material, a hydraulic problem, or low fluid, all of which affect stopping ability.