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2025
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Clever use of plastic bags to deal with the leakage of the trailer brake sub-pump in an emergency
Our truck is composed of many system parts, if you ask you which system on the truck is the most important, I believe you will definitely say the brake system, because the brake system is directly related to our driving and life safety. One of the most critical components of the pneumatic brake system is the brake cylinder (scientific name brake air chamber).
● What is the brake sub-pump The device that provides braking power
The brake sub-pump is actually a device that converts compressed air energy into mechanical energy, which is installed on the axle to provide power for braking.
● The role of the brake sub-pump pushes the parts to complete the braking
When we step on the brakes, compressed air enters the brake sub-pump, pushes the sub-pump piston, the piston transmits kinetic energy to the push rod, and pushes the brake camshaft, and the brake camshaft drives the brake shoe to rub the brake drum to complete the braking action.
● Brake film damage and air leakage Brake failure cannot start
The film is a very important component in the brake sub-pump, responsible for energy conversion, once the brake sub-pump is damaged, the brake sub-pump will fail.
If the driving state encounters this fault, it will cause the brake pressure to drop sharply when applying the brakes, resulting in brake failure and loss of vehicle control, which seriously threatens driving safety.
If the brake sub-pump film is damaged and leaks in the parking state, the brake air pressure will not be able to meet the driving standard, causing the vehicle to be unable to start. At this time, if it happens to be on the road, it will immobilize the vehicle, affecting the traffic of other vehicles and causing congestion.
● Emergency treatment: Cut off the air supply to the damaged area
On the road, once the brake sub-pump film leaks, we need emergency treatment, so that the vehicle can drive relatively safely to the nearby repair shop to replace the film, and the common method is to cut off the air source input.
First, disassemble the brake pipe joint of the brake sub-pump.
Second, find a thinner plastic packaging bag, tear off a little ball and stuff it into the air input interface of the brake sub-pump, and pay attention to the tightening of the fortress.
Third, install the brake pipe back to the brake sub-pump as it is.
The sub-cylinder that blocks the air leak allows the air pressure of the whole system to be maintained at a normal level, but it should be noted that this method will cause the brake of a single wheel position on one side to fail, and can only be used in an emergency.
Note: This method is only suitable for the brake end of the trailer and the main vehicle brake pump, and this method cannot be used for the spring energy storage parking brake end, otherwise it will cause the parking brake to be unable to be released!
● Do not disassemble the brake sub-pump unless it is professional
If you have no relevant experience, do not try to disassemble the spring energy storage type brake sub-pump, because this type of brake sub-pump has a very elastic energy storage spring inside, which is very likely to cause the air chamber to suddenly bounce open, causing injury to people or even threatening life-threatening safety!
● Postscript:
Perennial driving career on the road will inevitably have sudden failures, when encountering such failures, don't worry, learn some emergency handling methods, often easy to solve difficult problems, ensure safety while also helping us reduce economic losses.
Focus on the research and development of automotive brake systems and pneumatic brake valves to promote the development of the auto parts industry!
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