OEM piston spacer for Graco airless sprayer pumps, designed to maintain precise piston alignment for stable pressure and smooth operation.
Compatibility depends on pump revision and sprayer series. Always verify using the official Graco parts manual before replacement.
The Graco 172391 Spacer, Piston is a precision OEM pump component designed to maintain correct spacing and alignment within the piston assembly of Graco airless spray systems. It ensures proper mechanical positioning between internal pump parts during operation.
By stabilizing piston movement and spacing, this component helps maintain consistent pressure, reduce internal wear, and support smooth pump cycling under high-pressure spray conditions.
The spacer plays a structural role inside the pump assembly, ensuring correct alignment and controlled movement of the piston system during operation.
The 172391 spacer should be installed during pump disassembly or rebuild procedures. Proper seating and alignment with surrounding piston components is essential to ensure correct pump performance and prevent premature wear.
