Part 0509521 is a retainer ring used to secure internal components within the pump and drive assemblies of Advantage and SprayTech GPX series airless paint sprayers. Proper retention ensures correct component positioning and reliable operation during spraying.
Components included:
| Part Number | 0509521 |
|---|---|
| Part Description | Retainer Ring |
| Function | Component retention / axial positioning |
| Fits | Advantage & SprayTech GPX Series (select models) |
| Condition | New |
The 0509521 Retainer Ring is a snap-ring type retention component used in select Advantage and SprayTech airless sprayers. Its function is to hold internal parts—such as pins, shafts, or sub-assemblies— securely in place within their designated grooves.
Retainer rings are subject to stress during removal and installation. If a ring becomes stretched, distorted, or no longer clamps firmly, it should be replaced to maintain correct mechanical retention and alignment.
| Retention | Keeps internal components seated in their grooves |
|---|---|
| Alignment | Maintains correct positioning during operation |
| Stability | Helps reduce vibration-related movement or play |
| Loss of tension | Ring no longer clamps firmly in the groove |
|---|---|
| Physical damage | Cracks, deformation, or visible distortion |
| Repeated removal | Ring has been overstretched during prior service |
| Component movement | Internal play or shifting observed in the assembly |
Part 0509521 is compatible with the following Advantage and SprayTech airless paint sprayers. Always verify fitment using the correct parts diagram for your exact model and revision.
| Sprayer Model | Component |
|---|---|
| Advantage GPX 130 | Retainer Ring (0509521) |
| Advantage GPX 165 | Retainer Ring (0509521) |
| Advantage GPX 220 | Retainer Ring (0509521) |
| SprayTech GPX 130 | Retainer Ring (0509521) |
| SprayTech GPX 165 | Retainer Ring (0509521) |
| SprayTech GPX 220 | Retainer Ring (0509521) |
| SprayTech GPX 1250 | Retainer Ring (0509521) |
| SprayTech GPX 1600 | Retainer Ring (0509521) |
| SprayTech LC 1600 | Retainer Ring (0509521) |
| SprayTech LCX 130 | Retainer Ring (0509521) |
Wear in retained components can affect ring performance.
Burrs or scoring can prevent proper ring seating.
Excessive play nearby can overstress the retainer ring.
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