本SAE推荐实践应涵盖具有可见外露推杆的执行器的机械制动调节极限行程指示器和所有空气制动执行器的电气制动调节极限行程指示器。 当按照车辆制造商的程序进行检查时，该装置应指示基础制动器可能需要调整或维修。对于任何未经工厂校准的系统，应进行测量以确定实际行程测量值。 只有当空气制动执行器的所有部件都由原始制动执行器制造商提供时，才能确保空气制动执行器的行程指示精度。

This SAE Recommended Practice shall cover mechanical-brake adjustment limit stroke indicators for actuators with visible exposed pushrods and electrical-brake adjustment limit stroke indicators for all air-brake actuators. This device shall indicate the foundation brake(s) may require adjustment or service when inspected per vehicle manufacturer's procedures. A measurement shall be made to determine actual stroke measurement for any system not factory calibrated. Stroke indication accuracy of an air-brake actuator can be assured only when all of its components are supplied by the original brake actuator manufacturer.