7 Step Air Brake Test PDF
The 7-step air brake test is a set of operational and diagnostic tests on an air brake system. It consists of the following: check, release, hold, apply and release pressure. This test has been designed to assess the condition of some components in an air brake system such as valves and cylinders.
Air brakes are braking devices that use compressed air to create resistance against pistons which then slows or stops a vehicle by transferring its kinetic energy into heat through friction with the surrounding medium (usually oil). Air brakes were first used on trains over 100 years ago but now they can be found on all types of vehicles including cars. There are two main types: pneumatic and vacuum systems; each type has advantages and disadvantages depending on what type.
