Graco 116550 Retaining Ring

Graco 116550 – Retaining Ring

The Graco 116550 Retaining Ring is a genuine OEM internal ring used in Graco spray‑gun assemblies to secure pistons, valves or internal cartridges. It ensures proper alignment and retention of internal components, maintaining seal integrity and reliable operation under pressure.

Key Features & Purpose

• OEM‑grade part: Genuine Graco retaining ring — ensures correct fit and internal alignment. :contentReference[oaicite:5]{index=5}
• Internal retention: Holds pistons, valves or fluid‑cartridge assemblies securely inside spray‑gun housings to prevent axial movement or disassembly under pressure. :contentReference[oaicite:6]{index=6}
• Durable design: Built to withstand chemical exposure and repeated cycles typical in spray and fluid‑handling applications. :contentReference[oaicite:7]{index=7}
• Compact hardware: Small ring — easy to install during maintenance or rebuild of the gun’s fluid/piston assembly. :contentReference[oaicite:8]{index=8}
• Critical for performance: Ensures internal parts remain properly seated, which maintains spray performance, prevents leaks, and extends equipment life. :contentReference[oaicite:9]{index=9}

Compatible Guns / Applications

• Graco Fusion AP Spray Gun (including Air‑Purge / ProConnect variants) — 116550 is listed in the parts diagram for these guns. :contentReference[oaicite:10]{index=10}
• Any Graco spray‑gun assemblies which reference “RING, retaining – 116550” in their exploded parts schematic or manual. :contentReference[oaicite:11]{index=11}
• Use during maintenance or rebuild of internal fluid or piston assemblies where ring retention / internal alignment is required. :contentReference[oaicite:12]{index=12}

Note: Because 116550 is an internal retaining ring, it will only fit spray‑guns designed to use it (mainly Fusion‑series). Always verify your gun’s model and parts diagram before replacement or ordering.

When & Why to Use / Replace 116550

• If the original retaining ring is worn, damaged, or missing — replacing it restores correct internal alignment and prevents leaks or malfunction.
• During full rebuild or maintenance of spray‑gun fluid section or piston/valve assemblies — ensures all internal components are properly retained.
• When servicing or replacing internal cartridges, pistons or valves — a genuine 116550 ring ensures proper OEM‑spec fit and extends service life.

Frequently Asked Questions