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Why don't large trucks use hydraulic brakes?

1 Answers

Dawson

07/30/25 9:00am

Reasons why large trucks don't use hydraulic brakes: Air brakes have better sensitivity than hydraulic brakes, and large trucks generate higher braking temperatures. Hydraulic brake fluid is susceptible to high temperatures, and hydraulic systems are prone to oil leaks, making them less reliable than high-pressure air brakes. Passenger cars commonly seen in daily life use hydraulic brakes. The main components of hydraulic brakes include the vacuum booster, master cylinder, wheel cylinders, brake pads, and brake discs. The vacuum booster provides assistance, allowing the driver to easily depress the brake pedal. When the brake pedal is pressed, the master cylinder pushes brake fluid to actuate the wheel cylinders, which then force the brake pads to clamp onto the brake discs, thereby slowing down the vehicle.

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