How should elevator door hardware be maintained?

The maintenance of elevator door hardware is crucial for ensuring both the safety and functionality of the elevator system. Regularly checking and tightening bolts, along with lubricating moving parts, helps to prevent mechanical failure and wear over time. This proactive approach addresses potential issues before they develop into more significant problems, thereby extending the life of the hardware and maintaining smooth operation.

Checking bolts ensures that all components are secure, which is vital for the safe movement of the elevator doors. If bolts are loose, it can lead to misalignment or failure of the door mechanism. Lubricating moving parts reduces friction, which not only helps in the smooth operation of the doors but also minimizes wear and tear on those components.

The maintenance regimen suggested in the correct answer aligns with industry standards that emphasize preventative maintenance as a best practice in elevator care. This thorough approach is more effective and cost-efficient than more extreme measures like annual replacements or inadequate cleaning methods that do not address the functional and structural integrity of the hardware.