An operator observes that the attachment's locking pins on a quick-attach coupler are not fully extending, even after repeated attempts. What is the safest course of action?

Question: An operator observes that the attachment's locking pins on a quick-attach coupler are not fully extending, even after repeated attempts. What is the safest course of action?

Answer options:

• Proceed with caution, as the attachment is likely partially secured.
• Manually force the pins into place using a hammer. ✅ Do not operate the machine; consult the operator's manual, inspect for obstructions or damage, and address the issue before operation.
• Increase the hydraulic pressure to the auxiliary circuit to force the pins to extend.

Correct answer: Do not operate the machine; consult the operator's manual, inspect for obstructions or damage, and address the issue before operation.

Explanation: If attachment locking pins do not fully engage, the attachment is not properly secured, posing a severe detachment hazard. The machine must not be operated, and the issue must be diagnosed and rectified according to manufacturer's instructions to ensure safety. This is a critical safety interlocking mechanism often referenced in CSA B335.