How do you verify that a newly replaced coupler engages correctly?

• A. Perform coupler alignment test, check lock release, verify locking pins, and perform a light tug test to confirm engagement.
• B. Visual inspection of the coupler only.
• C. Light tug test alone is sufficient to confirm engagement.
• D. Check lock release and locking pins with a full assembly inspection.

Answer: (A)

Verifying a newly replaced coupler engages correctly requires confirming several related aspects, not just how it looks. Start with alignment to ensure the coupler heads or knuckles line up so they can couple properly; misalignment can prevent secure engagement even if everything else looks fine. Next, check the lock release to confirm the mechanism can operate as designed, allowing safe uncoupling when needed. Then verify the locking pins are present and correctly installed, since missing or damaged pins can compromise the locking action. Finally, perform a light tug test to confirm the coupler actually engages and holds under a light load, catching issues that static checks might miss.

Visual inspection alone won’t prove engagement, and a light tug test by itself won’t reveal alignment or pin integrity. A thorough assessment that includes alignment, lock release, locking pins, and a light tug test provides the necessary confirmation that the newly replaced coupler will function safely in service.