How to self check truck brake pads to avoid premature wear and tear and scrap

Brake pads are the most vulnerable components of heavy truck braking systems, directly determining driving safety and vehicle maintenance costs. Many overseas mining areas and cross-border transportation fleets commonly have a problem: brake pads wear out prematurely and abnormally before reaching their normal service life, and even experience eccentric wear, burning, cracking, and scrapping. Most drivers only wait for brake failure or abnormal brake noise before replacing parts, which not only increases the cost of high-frequency parts replacement, but also poses great safety hazards in long downhill and heavy-duty road conditions. Mastering a simple and professional tool free self inspection method for brake pads, promptly identifying abnormal wear issues, can effectively prevent brake pads from being scrapped in advance, extend the service life of brake accessories, and adapt to operating scenarios with few overseas repair outlets and limited maintenance conditions. The daily self inspection mainly focuses on visual inspection, which is suitable for operation after parking and rest. The key is to check the remaining thickness of the brake pads. The friction layer thickness of the new brake pads is sufficient. When the friction material wears down to one-third of the remaining thickness, it belongs to the replacement warning state. Do not continue to drive under high-intensity heavy load. At the same time, observe the overall wear status of the brake pads. Normal wear should be uniform and flat on the surface. If there is unilateral wear, thick and thin on one side, inclined wear, local grooves, etc., it is a typical abnormal eccentric wear, most likely caused by poor return of the brake cylinder, guide pin jamming, and brake shoe misalignment. Failure to adjust in a timely manner will cause the brake pads to quickly wear out and be scrapped. Secondly, the most intuitive self inspection method is to determine the fault status through abnormal driving noise and brake feel. When the vehicle lightly brakes, there is a sharp metal friction sound and a piercing scraping sound, indicating that the friction layer of the brake pads is basically worn out and the iron disc directly contacts the brake drum; If there is a slight friction noise during the driving process even without stepping on the brake, it indicates that the brake pads have not fully returned and are in a semi brake fit state for a long time, which will cause the brake pads to continue to be hot and quickly wear out.Normal brake sensing is linear and smooth, with even braking. If the brake is soft, the brake is light or heavy, or the front of the car deviates, there is a high probability of uneven force on the brake pad contact surface and local overheating and carbonization problems, which will greatly accelerate the wear rate. Key inspections will focus on the hidden danger of high-temperature burning of brake pads. Heavy trucks in mountainous areas of the mining area frequently brake on long downhill slopes, and the brake pads are prone to high temperature overheating, resulting in surface brightening, hardening, coking, blackening, and carbonization. The friction coefficient of the carbonized brake pads decreases significantly, the braking performance weakens, and the wear rate increases exponentially, which is a typical cause of premature scrapping. During self inspection, check the surface of the brake pads for any hard spots, burnt layers, peeling or detachment. If burning is found, it is necessary to polish or replace the parts in a timely manner to avoid subsequent brake failure and rapid wear. In addition, it is necessary to investigate the underlying causes of wear and tear in conjunction with the chassis operating conditions. Many brake pads are damaged prematurely not due to component quality issues, but rather due to chassis failures. Loose wheel hub bearings, malfunctioning brake adjustment arms, brake camshaft jamming, and steel plate displacement can all cause abnormal brake fit and irregular wear. During daily self inspection of brake pads, a simple check should be made to ensure that the brake clearance is consistent and that the wheel edges are not hot. If one side of the wheel heats up abnormally after heavy driving, it can be basically determined that the wheel has drag brake wear and needs to be repaired and adjusted in a timely manner. To prevent brake pads from being scrapped prematurely, in addition to daily self inspection, it is also necessary to cooperate with standardized driving habits, try to avoid heavy load sudden braking, frequent braking on long downhill slopes, and reasonably match the retarder to share the braking force and reduce the high-frequency workload of brake pads. In summary, self inspection of truck brake pads does not require professional equipment. By following the steps of checking thickness, wear and tear, hearing abnormal noises, touching temperature, and checking drag brakes, the vast majority of abnormal problems can be quickly identified. Developing a regular self inspection habit for overseas fleets, promptly handling minor faults and poor working conditions, can effectively avoid abnormal wear and tear of brake pads, reduce the frequency of parts replacement and driving risks, reduce the long-term operation and maintenance costs of the fleet, and ensure stable vehicle operation.