Which seals are contained in the rod bushing?

Rod bushing assemblies in hydraulic systems are designed to support the movement of the piston rod while maintaining the integrity of the hydraulic fluid within the cylinder. The correct answer, which identifies rod wiper seals and pressure seals, highlights the dual functionality necessary for optimal operation.

Rod wiper seals play a crucial role in preventing contaminants such as dirt and debris from entering the hydraulic cylinder. This seal effectively wipes the rod as it exits the cylinder, ensuring that no external particles are drawn into the hydraulic fluid, which could lead to wear or failure of internal components.

Pressure seals, on the other hand, are designed to maintain fluid pressure within the hydraulic cylinder. These seals prevent hydraulic fluid from leaking out as the piston rod moves in and out of the cylinder, ensuring that the system can function efficiently and effectively under pressure.

Together, these seals form a critical part of the rod bushing assembly, making the answer defensible due to their combined roles in both contamination control and pressure maintenance. This understanding of the specific functions of these seals helps provide insight into the design and operation of hydraulic systems.