Which action verifies that the brake shoes are clear of the wheels after cutting out the air brake?

Which action verifies that the brake shoes are clear of the wheels after cutting out the air brake?

• A. Verify that the brake shoes are away from the wheels.
• B. Verify that the brake cylinder piston retracts.
• C. Close the cut-out cock in the brake pipe branch pipe.
• D. Release air from reservoirs.

Answer: (A)

After cutting out the air brake, you need to confirm there is no contact between the brake shoes and the wheels. Verifying that the brake shoes are away from the wheels directly proves there’s no mechanical drag and that the brakes won’t rub when the system is recharged. Relying on the brake cylinder piston retracting can miss issues like a stuck linkage or misadjusted shoes, and closing the cut-out cock or releasing air from reservoirs doesn’t directly show whether the shoes are cleared. The best check is a direct confirmation that the shoes are physically clear of the wheels.

After cutting out the air brake, you need to confirm there is no contact between the brake shoes and the wheels. Verifying that the brake shoes are away from the wheels directly proves there’s no mechanical drag and that the brakes won’t rub when the system is recharged. Relying on the brake cylinder piston retracting can miss issues like a stuck linkage or misadjusted shoes, and closing the cut-out cock or releasing air from reservoirs doesn’t directly show whether the shoes are cleared. The best check is a direct confirmation that the shoes are physically clear of the wheels.