What are the steps after attaching a locomotive to a train previously tested with yard air?

Charging air to the regulator, performing a leakage test, and then testing application are critical steps in ensuring the operational integrity of the air brake system after attaching a locomotive to a train that has been previously tested with yard air.

Charging air to the regulator is the initial step that ensures the air brake system is adequately pressurized. This is essential because the air brakes rely on the availability of compressed air to function properly.

Performing a leakage test follows charging. This test is vital for checking that there are no leaks in the air system, which could lead to loss of pressure and compromise braking effectiveness. During this test, inspectors monitor the air pressure drop over a specific period to determine if any leaks exist.

Lastly, testing application involves checking that the brakes respond appropriately when the air is applied. This step verifies that the system operates as intended and that the brakes can be safely applied when needed.

Together, these steps are critical in confirming that the train's braking system is safe and effective for operation before proceeding with any further actions.