What is the acceptable applied leakage test limit for a combination of 3 or more vehicles?

The acceptable applied leakage test limit for a combination of three or more vehicles is set at -6 psi. This standard is established to ensure that the air brake systems in these vehicles can hold pressure adequately, which is critical for safety and efficiency during operation. A leakage limit of -6 psi indicates that the air brake system must maintain sufficient pressure without leaking too much air over a designated period. This testing is a vital part of vehicle safety inspections and helps identify potential issues that could affect braking performance.

Maintaining the correct air pressure is necessary for the proper functioning of air-operated brakes, and ensuring that leakage does not exceed this threshold helps in the timely detection of maintenance needs before they become critical issues on the road.