Brake drum cracking why?

Brake drum cracking why?
Don't open the water until you find the temperature is high
Brake spray is an important device to ensure the safety of trucks in China. The main function is to reduce the temperature of brake drum and reduce the thermal decay of brake. And brake drum if too hot when the water, only let the brake drum cracking consequences.
Proposal: before downhill, had better choose long open drench water, that did not spend how many money, can improve traffic safety however.
Brake sprinkler device, in China has been a very contradictory thing, in the north you install it, he said you change the model, run to the south you do not install it, he said you violated the rules, which is embarrassing and bitter, only truck people know the taste. The suggestion had better still choose the vehicle that has auxiliary brake, operate correctly, reduce when downhill unnecessary traffic brake.
2.1. The brake is very hot and goes into the pool
Many high-speed downhill sections design a cooling pool halfway up the hill to cool the brake drum. If the temperature of the brake drum is too high, direct access to the pool is easy to cause cracks, serious even burst.
Tip: if the brake drum is too hot, stop for a rest and let it cool down naturally.
3. Change to "brake king"
Brakes don't work well, usually for a number of reasons. In order to improve the braking effect, some drivers will choose a product called "brake king". Brake king so-called "brake good", is nothing more than to increase the amount of air on the brake gas road, the consequence is that the brake drum can not withstand so much force, resulting in rupture.
Suggestion: the brake is not good is the system question generally, the best system inspection air way, the valve body and the mechanical part and so on, had better not use the brake king.
4. Do not pay attention to inspection
Some careless drivers usually will not go to pay attention to their own brake drum situation is how in the end, in peacetime maintenance of the car, should pay more attention to observe the thickness of the brake drum, whether there are too serious cracks.
Suggestion: the truck should be "to raise repair", usually pay attention to the inspection, do not wait until the broken repair.
5. Too much reliance on trailer braking
In order to prevent the phenomenon of "push head" on the wet and slippery road surface, some semitrailer tractors weaken the brake of the main vehicle and rely too much on the brake of the trailer, resulting in the excessive load of the brake drum of the trailer and the high failure rate.
Suggestion: pay attention to check the brake of the whole vehicle, maintain the overall coordination between the main vehicle and the trailer brake, and do not rely too much on the trailer brake.