What is caused by failed rod seals?

The correct answer highlights that failed rod seals allow dirt and air to enter the hydraulic system. Rod seals are crucial components that maintain the integrity of the hydraulic system by preventing external contaminants and air from infiltrating through the actuator. When these seals fail, not only does it compromise the performance of the hydraulic system, but it also risks the introduction of dirt and other contaminants, which can lead to further damage and inefficient operation.

The entry of dirt and air can cause a range of issues such as reduced efficiency, erratic operation, or even catastrophic failure of various hydraulic components, further emphasizing the importance of maintaining seal integrity. Therefore, understanding the role of rod seals in securing the hydraulic system against external influences is vital, especially in applications where precision and reliability are paramount.