How to determine if the steel plate lining has failed when using cars in overseas mining areas

Overseas mining areas and quarries experience frequent bumps and high heavy load intensity, making them the scenarios with the fastest wear and tear of heavy truck suspension components. As the buffering core of the suspension system, steel plate bushings are responsible for shock absorption and noise reduction, eliminating steel plate gaps, and stabilizing the vehicle's posture. They are easily overlooked vulnerable parts. Many fleets only focus on the wear and tear of steel plates and saddle bolts, ignoring the aging and failure of bushings, resulting in long-term operation with problems, causing chain failures such as deviation, abnormal tire wear, and loose chassis. Mastering the method of determining the failure of vehicle lining in mining areas can prevent chassis failures in advance and reduce maintenance costs. Preliminary diagnosis of fault status based on abnormal chassis noise. The most obvious manifestation of steel plate lining failure is abnormal driving noise. When the vehicle passes through bumpy roads and speed bumps, there is a dull clattering sound and collision noise on the chassis. The abnormal noise intensifies when the vehicle is heavily loaded and bumpy, and the sound of driving on flat roads weakens. This is caused by aging, cracking, and delamination of the lining rubber, which cannot cushion the vibration of the steel plate. Vehicles in mining areas experience long-term high-frequency bumps, and the damping performance of the lining deteriorates much faster than that of ordinary mainline vehicles. If any abnormal noise occurs, it needs to be investigated immediately to avoid the fault from continuing to expand. Observe changes in vehicle posture and driving stability. A intact steel plate liner can constrain the displacement of the steel plate and maintain the stability of the vehicle body. After the wear and looseness of the lining, the suspension clearance increases, and the vehicle may experience chassis divergence, body drifting, and significant left and right shaking while driving. When climbing and turning under heavy loads, the body tilts more and the handling and following performance deteriorate, posing a safety hazard when driving at high speeds. Some vehicles may also have a single-sided lower body, which is a typical feature of severe wear and unbalanced force on the lining. Check the wear status of the tires and assist in determining the fault of the lining. The failure of steel plate bushings can lead to deviation of suspension positioning parameters, uneven force on the wheels, and irregular tire wear, resulting in problems such as serrated wear, eccentric wear, and wave wear. Many mining fleets frequently replace tires, but they still wear out too quickly, and the core reason is that the lining is loose and not replaced in a timely manner. If the vehicle has no positioning fault but continues to experience abnormal tire wear, priority should be given to investigating the wear of the steel plate lining. Visually inspect the appearance and clearance of the lining on site. During maintenance inspection, the status of the lining can be visually observed. Failure of the lining may result in rubber cracking, peeling, hardening, and detachment. In severe cases, the lining may come out and the metal sleeve may become loose. Use a pry bar to pry the connection between the steel plate and the bracket. If the gap is too large and there is obvious shaking, it can be determined that the lining has completely failed. At the same time, mud and dust in the mining area are prone to invade the gaps of the lining, accelerating metal wear. If the lining rusts, gets stuck, or exceeds the standard, it needs to be replaced in a timely manner. In summary, there are four core criteria for determining the failure of steel plate bushings in heavy trucks in mining areas: abnormal noise, unstable body, uneven tire wear, and excessive clearance. As a low-cost and vulnerable component of the chassis, timely replacement of bushings can effectively protect high priced accessories such as steel plates, frames, and wheels, avoiding joint failures caused by loose chassis. Overseas mining fleets need to include liner inspection in routine maintenance to achieve early detection and replacement, improve vehicle stability and attendance, and reduce long-term operating costs.