Maintenance on link-driven swing arm operators often includes what kind of adjustments?

Maintenance on link-driven swing arm operators primarily involves mechanical adjustments. These operators rely on physical components such as linkages, arms, and pivots to function properly. Over time, wear and tear can lead to misalignments, slack, or other mechanical issues that can affect the performance of the door operator.

Mechanical adjustments might include tightening loose components, realigning the swing arm to ensure smooth operation, or lubricating moving parts to reduce friction and enhance efficiency. This focus on the moving parts and their interactions is crucial for maintaining the intended functionality and safety of the elevator door system.

In contrast, the other options, such as electrical adjustments, would pertain more to the electrical systems that drive some operators, while aerodynamic adjustments and structural adjustments do not directly relate to the typical maintenance required for link-driven swing arm systems.