What common issue might arise from improperly lubricated escalator chains?

Improperly lubricated escalator chains can lead to increased wear and noise, which may result in unexpected failures. Chains that are not adequately lubricated experience higher friction between the moving parts. This friction accelerates wear on the chain and its associated components, ultimately shortening the lifespan of the escalator system. Increased noise is also a byproduct, as the metal components grind against each other without the protective layer that lubrication provides. Regular maintenance and proper lubrication are crucial for ensuring the smooth operation and longevity of escalators, hence it's essential to address any lubrication issues proactively to avoid operational disruptions.