Which two indications suggest cavitation or aeration damage in a vane pump?

The correct answer highlights critical signs indicative of cavitation or aeration damage within a vane pump. Ripple marks inside the cam ring are a consequence of fluctuating pressures and the formation of vapor bubbles during cavitation. These fluctuations can create uneven wear patterns, leading to noticeable ripple effects that confirm the occurrence of cavitation.

Erosion at the ports further reinforces this indication, as cavitation may lead to the aggressive removal of material from surfaces as vapor bubbles collapse and create high-pressure shock waves. This erosion is a physical manifestation of the damaging effects of cavitation, making both ripple marks and port erosion reliable indicators of such issues within the pump.

Understanding these specific symptoms helps in diagnosing maintenance needs and preventing further damage to the hydraulic system. By recognizing that these signs correlate directly to cavitation-related deterioration, technicians can effectively address pump failures and take corrective action to safeguard the equipment’s integrity.