Piston Pump Measuring Tool Test Ring Caterpillar 1293877

The Piston Pump Measuring Tool Test Ring maintains a fixed relationship between the internal pump elements. The tool supports accurate observation of barrel lift-off behavior without relative movement influencing the readings. This alignment control is required when determining pump barrel lift-off shim thickness, as it keeps contact faces in a stable condition throughout the measurement process. The ring supports repeated measurement steps by preserving the same alignment during each check, allowing comparison of values before and after shim selection.Attributes:• Maintains alignment between barrel and slipper retaining plate.• Supports measurement of pump barrel lift-off behavior.• Assists in determining the lift-off shim thickness.Applications: The Piston Pump Measuring Tool Test Ring is used during piston pump service procedures to hold alignment between the port plate, barrel, and slipper retaining plate while measuring pump barrel lift-off shim thickness.