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Brake drums play a pivotal role in the braking system of semi trucks. When the driver applies the brakes, hydraulic pressure forces brake shoes against the inner surface of the drum. This process generates friction, which slows down the truck. The drum's design allows for efficient heat dissipation and ensures consistent braking performance, even under heavy loads.

Self-energizing drum brakes operate based on the principle of self-application of force. When the brake pedal is pressed, a wheel cylinder pushes the brake shoes outward against the inner surface of the brake drum. As the shoes make contact with the drum, the friction generated causes the shoes to pivot, resulting in an increased gripping force against the drum. This action is what sets self-energizing brakes apart from traditional drum brakes, as the shoe’s movement creates additional force to assist in braking.

2. Take Off the Drum Carefully slide the drum off the wheel hub. If it doesn’t come off easily, check for any hidden retaining springs that might be holding it in place.

The wheel bearings play a crucial role in this system. They bear the weight of the vehicle and ensure that the wheel rotates smoothly. In many designs, wheel bearings are integrated as sealed units that require minimal maintenance. However, in some systems, the bearings can be serviced, allowing for replacement when wear occurs.

Ostatnim krokiem jest dokładne sprawdzenie powierzchni bębna. Upewnij się, że nie ma na niej żadnych widocznych uszkodzeń, takich jak pęknięcia czy głębokie rysy. Powierzchnia powinna być gładka i nie powinna mieć oznak korozji.

4. Suriin ang Brake Drum Kapag naalis ang gulong, suriin ang brake drum para sa anumang palatandaan ng pagkasira o labis na pagsusuot. Kung mayroong mga marka o gasgas, maaaring kailanganin itong palitan.

3. چراغ هشدار ترمز

6. Adjust the Brake Shoes Using a screwdriver, rotate the adjusting mechanism. Turning it “up” or “clockwise” usually expands the shoes and increases contact with the drum. Make small adjustments, checking the feel of the shoe engagement frequently. You want the shoes to engage firmly without dragging against the drum.

When it comes to vehicle maintenance, ensuring the braking system is in optimal condition is paramount for safety. Among various brake systems, drum brakes are still prevalent in many vehicles, particularly in older models and some budget-friendly options. For anyone looking to perform their own brake maintenance or repairs, having a dedicated drum brake tools kit is essential.