The Piston Pump Measuring Tool Test Ring is used during pump setup to correct positional alignment between internal rotating elements while measurement checks are performed. The tool creates a fixed reference condition that allows consistent spacing to be evaluated without component shift. During barrel lift-off measurement, the ring keeps the port plate, barrel, and slipper retaining plate positioned correctly. This controlled positioning allows proper shim thickness determination.Attributes:• Ensures uniform contact during static measurement checks.• Reduces measurement variation caused by misalignment.• Improves repeatability across multiple measurement cycles.Applications: The Piston Pump Measuring Tool Test Ring is used during pump inspection and setup procedures where internal component alignment is required to measure barrel lift-off shim thickness accurately.