In the process of the long slope of the vehicle, it is generally used to control the speed in low gear, but when the temperature of the brake drum is too high, there may be a risk of brake failure. At this point, try to see if the vehicle can still brake if it can brake, reduce the speed, after the slope, roadside parking, natural cooling before hitting the road. If there is no brake, control the direction of the card, this long slope has anti-brake failure of the block (bunker) in addition, the big truck should be installed on the brake drum cooling water pipe, long-distance exercise and continuous downhill cooling, but to use in advance, until the temperature is too high can not be used.