How to easily identify the wear warning signal of heavy truck brake pads

Heavy truck brake pads are high-frequency loss safety components that directly affect braking distance and driving safety. Overseas fleets are mostly operating under long-distance heavy loads and mountainous slopes, resulting in faster wear and tear of brake pads. Many drivers rely solely on regular visual inspection of thickness, which can easily miss early wear and tear hazards, leading to brake drag, brake weakness, brake drum wear, and even causing safety accidents. In fact, when a vehicle approaches the limit of brake pad wear, it will emit various obvious warning signals, which can be quickly identified without the need for professional equipment during daily driving.
Abnormal noise warning is the most intuitive wear warning. The brake pads are equipped with wear warning iron plates. When the friction material wears to its maximum thickness, the iron plates will directly contact the brake drum or brake disc. When braking, there will be a crisp and piercing metal friction sound, and the abnormal noise is obvious when lightly stepping on the brake. It disappears immediately when releasing the brake. When braking frequently during heavy downhill driving, the abnormal noise will become more prominent. The appearance of this signal indicates that the brake pads have reached the critical point for replacement. Do not continue to use them indiscriminately, otherwise it may cause the brake drum to be pulled and grooved, leading to greater repair losses.
The change in brake feel can predict wear and aging in advance. As the friction layer of the brake pads gradually becomes thinner, the braking stroke will significantly increase. After the brake becomes soft and comes to a stop, it is originally easy to slow down with a light step, but later requires a deep step on the brake to achieve braking force. At the same time, there may be brake bias and slight body deviation, which is caused by uneven wear of the brake pads. If there is a decrease in brake sensitivity and an increase in brake virtual position during daily driving, it indicates that the overall wear and tear of the brake pads is severe and needs to be checked and replaced in a timely manner to avoid the risk of overloaded braking failure.
Observe the temperature of the wheel hub and identify abnormal wear. Under normal braking conditions, the temperature of each wheel hub is relatively uniform. If one side of the wheel hub becomes hot and even discolored for a long time, it is likely due to uneven wear and poor return of the brake pads, resulting in drag brake friction. Long term dragging not only accelerates the scrapping of brake pads, but also leads to tire overheating and fuel consumption skyrocketing. Mountainous working conditions are prone to brake heat degradation, seriously affecting driving safety and being a hidden wear hazard that is easily overlooked.
Visually inspect the wear scale and accurately determine the degree of wear and tear. The regular brake pads have wear markings on the side, which is the official judgment standard. When the wear of the friction material approaches the bottom line of the scale, whether there is any abnormal noise or malfunction, it needs to be replaced in a timely manner. At the same time, check the brake pads for issues such as uneven wear, chipping, and carbonization, which can significantly reduce braking performance. Even if the thickness is sufficient, it needs to be replaced in a timely manner to ensure braking stability.
In summary, identifying brake pad wear does not require complex testing. By using the four major signals of abnormal noise, brake feel, wheel hub temperature, and scale wear, hidden dangers can be quickly identified. Overseas heavy-duty transportation operates under strict conditions. Early identification and warning, as well as timely replacement of parts, can not only avoid driving safety risks, but also protect brake drums and braking systems, reducing the long-term operation and maintenance costs of the fleet.