Which factor is NOT typically checked during the maintenance of a pneumatic cylinder?

During the maintenance of a pneumatic cylinder, it is essential to conduct various checks to ensure that the system operates efficiently and safely. Visual inspection for physical damage allows technicians to identify any visible wear or deterioration that could affect performance. Monitoring for leaks is crucial since air leaks can lead to a loss of efficiency and increased operational costs. Assessing the speed and force of operation helps in ensuring that the cylinder is performing within its designed specifications, thereby maintaining optimal functionality.

While checking the expiry of components may be relevant in certain contexts, it is not a typical factor checked during the maintenance of a pneumatic cylinder. Pneumatic cylinders do not usually have an "expiry date," as they are designed for long-term use and are maintained through regular inspections and servicing rather than replaced solely based on age or a defined expiration period. This makes the verification of component expiry less relevant in standard maintenance procedures for pneumatic cylinders.