The oil seal aging hoisting vehicle has been halted due to uneven contact stress near the seal. The greater the stress direction, the larger the variable of the oil seal; the longer the hoisting vehicle remains stationary, the harder it is for the variable to recover, until the oil seal undergoes durable deformation, leading to a simple oil leak.
2. Prolonged idling of crane vehicles with oxidized engine oil leads to severe oxidation issues. Once the oil oxidizes, it results in: 1) a significant decline in lubrication effectiveness, and 2) acidic substances that can corrode the mechanical components. The longer the crane vehicle is stationary, the more severe the degradation becomes. When the engine restarts, there will be dry or semi-dry friction between the cylinder and piston, accelerating wear on the parts and greatly increasing starting resistance, making it difficult to start the engine.
3. Lead-acid batteries are commonly used in crane trucks, which have the characteristic of self-discharge when the crane is stationary. Under normal conditions, the battery's self-discharge can cause a capacity drop of over 1% per day and night. Particularly severe is that after prolonged self-discharge, sulfates form on the battery plates, affecting the recharging efficiency and ultimately leading to premature battery failure. The used crane assessment calculator can estimate the battery's lifespan.
4. After an overhead crane stops due to tire deformation, the crane's weight is supported by the points of contact between the four tires and the ground, leading to compression and deformation at these contact points. The longer the crane remains stationary, the more difficult it is for the deformed areas to recover, altering the weight distribution near the tires and causing uneven rolling radius, resulting in tire imbalance. Once the crane reaches high speeds, the body of the crane may shake and vibrate, which can accelerate tire wear and pose safety risks to the crane operator.
