Except that the brake bite may cause the brake drum to be hot, which can be eliminated by checking and adjusting the brake device, there are also the following reasons that may cause the brake drum to be hot:

1. Road impact. Cars such as more roads complex curve slope and obstacles in the road, especially in the narrow mountain road, curved, long slope and slope steep road conditions, not only to use brake, but also to continuously use brake to control the speed, the drum brake with contact number increase, friction time growth, so that the temperature of the brake drum were burning up quickly. At this point, in addition to the thermal recession will reduce the friction coefficient, braking performance deteriorated, when the summer temperature is high, may also make the tire burst. Therefore, brake drums must be prevented from burning according to road conditions.

2. Improper driving operation. Inadequate use of exhaust brake, improper excessive use of wheel brake, resulting in the brake shoe and brake drum contact times increase, contact time increase, resulting in the brake drum hot. For example, under the long slope, you can use exhaust brake to control the speed, even under the steep slope, but also in a lower grade under the use of exhaust brake, only in the diesel engine speed is relatively high, only at the same time to use the wheel brake to reduce the speed.

However, some drivers think that the exhaust brake will increase the wear of the cylinder, which is not willing to use, this is a misunderstanding. At first glance, the increased exhaust pressure will aggravate the cylinder wear, but it is not. Because downhill, especially downhill, should use three or two to drive safely, when using exhaust brake can be switched to four or three, thus, the diesel engine speed is reduced a lot, so the cylinder wear is not increased, but correspondingly reduced.

In addition, the use of exhaust brake can not only reduce the burden of the wheel brake, prolong the service life of the brake, but also to avoid the deterioration of braking performance, prevent the car in snow and ice, muddy road brake sideslip, which is conducive to the safety of the car.