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Graco 236786 aftermarket | Bedford 57-2131 Cylinder
PriceQuantity
236786
MPN:57-2131
Manufacturer:Bedford Precision Parts
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Graco 236786 Cylinder | Bedford 57-2131 Aftermarket Replacement
This precision-machined fluid cylinder replacement restores optimal performance to Graco 390ST and 390STS series pumps by providing a smooth, durable surface for piston travel. The Bedford 57-2131 serves as a direct aftermarket replacement for the Graco 236786, engineered to eliminate fluid bypass and restore pump efficiency. The honed interior surface ensures proper packing performance and extends service life while maintaining consistent pressure output. Proper installation of this cylinder ensures reliable operation and maintains the performance standards expected from Graco industrial spray equipment.
Why Choose This Cylinder
- Replaces worn cylinders that cause packing damage and fluid leakage
- Precision-honed interior surface reduces friction on piston travel
- Direct OEM replacement ensures proper fit in 390ST/STS pumps
- Extends service life of packings and other fluid section components
Applications & Compatibility
- Graco 390ST and 390STS series spray pumps
- Fluid sections that specify OEM part number 236786
- Industrial applications requiring cylinder replacement
Always verify by Illustrated Parts List (IPL) for your exact model before ordering.
What It Fits
- Graco 390ST series airless spray pumps
- Graco 390STS model spray pumps
- Compatible systems using the same fluid section design
If your pump IPL references Graco 236786, Bedford 57-2131 is the correct aftermarket replacement.
Technical Specifications
| Aftermarket | Bedford 57-2131 |
|---|---|
| OEM | Graco 236786 |
| Fits | Graco 390ST and 390STS pumps per IPL |
| Type | Fluid cylinder replacement |
| Material | Wear-resistant precision material |
| Function | Provides piston housing, reduces friction, protects packings |
| Pressure Rating | Rated for high-pressure airless applications |
| Brand | Bedford Precision Parts (Aftermarket) |
Installation Notes
- Relieve all system pressure and disconnect power source completely
- Disassemble fluid section following Graco service procedures
- Thoroughly clean housing bore before installing new cylinder
- Inspect piston for wear and replace if scoring is present
- Install new packings and reassemble to manufacturer specifications
Professional Tip: Always replace the cylinder, piston, and packings as a set for optimal performance and service life.
When to Replace Cylinder
- Visible scoring, galling, or wear patterns on interior surface
- Frequent packing failure or excessive fluid leakage
- Reduced pump output or difficulty maintaining pressure
- During complete fluid section overhaul or rebuild
Bedford vs OEM
| Feature | Bedford Aftermarket | OEM (Graco) |
|---|---|---|
| Fit & Function | Direct replacement per IPL | Original factory configuration |
| Surface Finish | Precision-honed low-friction surface | Factory surface specification |
| Service Life | Industrial-grade wear resistance | OEM performance baseline |
| Availability | If in stock, ships from Bedford Precision Parts in Bedford Hill, New York. | Ships via OEM distribution |
