How many PSI should the brake cylinder read on a fully charged M-7 train with the master controller handle in the MAX brake position?

In a fully charged M-7 train with the master controller handle in the MAX brake position, the brake cylinder pressure should read 38 PSI. This value is crucial for ensuring effective braking performance, as a higher pressure typically results in stronger braking force. The 38 PSI reading indicates that the brakes are optimally set for maximum braking efficiency, allowing for a controlled and responsive stop.

Understanding this specific pressure reading is essential for train operators, as it ensures that the braking system functions as intended. If the PSI were to read significantly above or below this value, it could indicate a potential issue with either the air brake system or the charging system, which could compromise safety and operational efficiency.