What is the required piston travel adjustment for freight cars with body-mounted brake cylinders at the initial terminal?

The required piston travel adjustment for freight cars with body-mounted brake cylinders at the initial terminal falls within the range of 6 to 9 inches. This range is crucial for ensuring that the air brake system functions effectively and efficiently. Proper piston travel adjustment is integral to achieving optimal braking performance and ensuring the safety of the train while it is in operation.

Understanding the correct piston travel adjustment is important because it directly impacts the actuation of the brake shoes against the wheels, ultimately affecting stopping distance, braking force applied, and overall train handling capabilities. If the piston travel is either too short or too long, it can lead to insufficient braking power or even brake dragging, which can result in overheating and wear of the brake components.

The other ranges provided are either too short or too long, making them unsuitable for the operational requirements specified for freight cars with body-mounted brake cylinders. This highlights the significance of following the prescribed adjustment range to maintain safety and reliability within the rail system.