Summary: The cam ring is an important component of a hydraulic vane pump. It guides the vanes as the rotor turns, allowing the pump to move hydraulic fluid. This article explains common causes of cam ring failure, including overpressurization, air in the hydraulic system, solid particle contamination, and cavitation.
Applies to: Customers experiencing or investigating hydraulic vane pump problems involving possible cam ring cracks, unusual wear, deformation, or other visible damage.
FINAL ACCEPTANCE CRITERIA
- Inspect the cam ring for cracks, abnormal wear, and surface damage.
- Evaluate possible contributing factors, including repeated overpressurization, aeration, contamination, and cavitation.
- Repair or replace damaged components as permitted by the manufacturer's service requirements.
TECHNICAL BULLETIN
This bulletin provides guidance for identifying and evaluating cam ring failure in hydraulic vane pumps. It explains how high pressure, air in the hydraulic system, dirt in the oil, and cavitation can damage the cam ring and affect pump performance. It also outlines inspection steps to help identify the cause and determine the appropriate repair based on the manufacturer's specifications.