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What Causes Severe Overheating of Front Wheel Hubs in Cars?

1 Answers

Jennifer

07/30/25 8:01am

There are two possible reasons for hub overheating: one is the wheel hub (axle head), and the other is brake drum overheating. Below are the relevant explanations: 1. Wheel hub (axle head) overheating: This may be due to excessively tight bearings or abnormal wear. Hub (axle head) overheating is generally caused by overly tight bearing assembly or poor lubrication. Excessive temperature can cause the internal grease to melt and leak out, affecting braking performance. In severe cases, it can burn out the bearings. The wheel hub bearing is a crucial component of a car's running gear. It plays a vital role in reducing friction resistance during chassis operation and maintaining normal vehicle operation. If the wheel hub bearing malfunctions, it may cause noise, bearing overheating, and other issues, especially in the front wheels, which can lead to dangerous situations like loss of steering control. Therefore, wheel hub bearings must be regularly maintained. 2. Brake drum overheating: This may be due to brakes not releasing or drum rubbing. The brake drum heats up whenever the brakes are applied and is the part of the front wheel that generates the most heat. The temperature of the brake drum is related to environmental temperature, driving speed, frequency of braking, vehicle weight, and road conditions. A few brake applications can raise the temperature to 100-200 degrees Celsius, and in heavy trucks going downhill, it can even exceed 300 degrees Celsius.

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