Why is it necessary to drain air tanks?

Draining air tanks is a crucial maintenance task primarily because it prevents the buildup of oil and water, which can lead to freezing and ultimately cause brake failure. Compressed air systems naturally accumulate moisture due to condensation, especially in colder weather. If this moisture is not drained, it can convert to ice within the air lines when temperatures drop, obstructing the flow of air necessary for the brakes to function properly. This could lead to a dangerous situation where the braking system is compromised.

Maintaining proper function and reliability of the air brake system is vital for the safety of the vehicle and all road users. Therefore, regularly draining the air tanks helps ensure that the air brake system operates effectively and reduces the risk of failures caused by excess moisture accumulation.