Graco 186209 Retainer - Aftermarket Replacement | Bedford 18-3550

Keep the seal stack correctly held and aligned in Graco piston pump assemblies with this stainless retainer. It supports sealing elements in the fluid section, helping maintain seating pressure and reduce bypass under working loads. Cross-referenced to Graco 186209 and supplied aftermarket as Bedford 18-3550, this component is used where service manuals call out a seal retainer in the intake/packing area. Choose it for routine overhauls when refreshing the wet-end of professional pumping systems.

Aftermarket Seal Support Stainless Build

Why Choose This Retainer

  • Stainless construction for corrosion resistance in professional coatings environments.
  • Maintains seal stack position to aid leakage control and long service intervals.
  • Dimensions match OEM callout for straightforward installation during pump rebuilds.

Finish: Natural stainless with smooth edges.

Typical Compatibility

  • Graco piston pump fluid sections that specify a retainer, seal in the IPL.
  • Documented use in 63:1 Ratio Kingt Pump (Model 223600 Series A) intake/packing area.
  • Other professional Graco assemblies where the manual lists the same OEM reference.

Always confirm against your sprayer or pump IPL before ordering.

What This Product Fits

  • Graco 63:1 Ratio Kingt Pump, Model 223600 (Series A) - seal retainer position in the fluid section.
  • Additional Graco piston pump models that list the same retainer in their parts diagrams (verify by part number in the manual).
  • Service rebuilds of industrial coating pumps where a stainless seal retainer is specified by the OEM.

Interchanges with the OEM reference shown below and the Bedford aftermarket number.

Technical Specifications

Aftermarket Bedford 18-3550
OEM Graco 186209
FitsGraco piston pump fluid sections that call this retainer in the IPL (see examples above)
TypeRetainer, seal (fluid section)
MaterialStainless steel
FunctionSupports and positions seal stack to maintain seating and reduce bypass
PressureUse within the model’s published working pressure; do not exceed the lowest-rated component
BrandBedford Precision Parts (Aftermarket)

Inspect mating seals, gaskets, and balls/seats during overhaul to prevent premature wear.

Installation Notes

  1. Depressurize equipment and isolate the pump per the service manual.
  2. Disassemble the fluid section to access the seal stack components.
  3. Inspect the cavity and clean debris; check the seat and adjacent parts.
  4. Position the retainer with the correct orientation and reinstall the sealing elements.
  5. Torque per specification, reassemble, prime with compatible fluid, and leak-check.

Tip: Replace O-rings, gaskets, and balls/seats at the same time to maximize uptime.

When to Rebuild / Replace

  • Visible wear, nicks, or deformation on the retainer contact faces.
  • Chronic leakage after installing new packings or gaskets.
  • Corrosion pitting that could compromise seating pressure.
  • Retainer looseness or movement detected during inspection.

Bedford vs OEM Comparison

FeatureBedford Aftermarket (18-3550)OEM (Graco)
Fit & InterfaceMatches OEM dimensions for seal stack supportFactory retainer for specified assemblies
PerformanceStainless build; supports leak control when seals are in specStainless build to OEM program
AvailabilityIf in stock, ships from Bedford Precision Parts in Bedford Hill, New York.Ships via Graco distribution
ValueCost-effective service optionOEM program

FAQs

Yes. It cross-references the OEM reference in Graco documentation where a stainless “retainer, seal” is specified in the fluid section.
One documented example is the Graco 63:1 Ratio Kingt Pump (Model 223600 Series A). Other pumps may also use it—verify by part number in your manual.
Stainless steel, suitable for professional coatings environments when used within the model’s pressure limits.
Follow the model’s service manual. Replace seals, O-rings, and related wet-end parts during the same rebuild for best results.
If in stock, Bedford ships from Bedford Hills, New York through its distribution network.