Truck ki Achanak se break fail ho jana 😱 | Isuzu / Hino / UD Trucks Truck's brakes failed suddenly! We opened the Hydraulic Brake Booster to repair it. As you can see, the main washer inside the piston was completely torn and damaged — this is one of the most common reasons for sudden brake failure in trucks. In this video, I’m showing the complete internal condition after opening it. If your truck's brakes fail without warning, you should definitely check this washer inside the booster. 👉 Thi