When servicing speed governors, what should be done to the means of speed adjustment?

Sealing the means of speed adjustment after testing is essential for maintaining the safety and integrity of the elevator system. The speed governor is a critical component that prevents the elevator from exceeding its safe operating speed. Once it has been calibrated and tested to ensure it functions correctly, sealing the adjustment mechanism prevents unauthorized or unintended changes that could compromise the elevator's performance.

Furthermore, sealing indicates that the speed governor has been regularly maintained and inspected, instilling confidence in the elevator's reliability and safety. This would typically involve using tamper-evident seals or some method of locking the adjustment to ensure that it remains exactly as set during the maintenance process.

In contrast, leaving the adjustment exposed could lead to modifications by individuals who may not have the necessary expertise, resulting in potential safety hazards. Similarly, completely removing or replacing adjustments without ensuring proper calibration could affect the elevator's performance and safety, negating the purpose of the speed governor altogether. Therefore, sealing after testing is the most appropriate and safest practice.