Graco 240580 Piston Valve - Aftermarket Replacement | Bedford 58-2680

This aftermarket piston valve restores check performance and pressure stability in select Graco large-frame airless pumps. It cross-references the OEM 240580 and Bedford aftermarket 58-2680 for dependable service life in demanding spray applications.

Aftermarket Precision-Machined Industrial Duty

Why Choose This Piston Valve

  • Restores sealing at the piston seat to recover prime and steady output.
  • Machined seat geometry supports repeatable check action under high load.
  • Aftermarket value from Bedford while maintaining OEM-matched interfaces.

Color cue: Inspect mating sleeve/rod faces during rebuild; replace worn parts together for best results.

Typical Compatibility

  • Graco GMax II 7900 (1st Generation) displacement pump assemblies where the piston seat is called out as 249-177 (old no. 240-580).
  • Additional heavy-duty gas/hydraulic sprayers using the same piston-seat specification (verify in your model’s parts list).

Always confirm against your sprayer model and bill of materials before ordering.

What This Product Fits

  • Graco GMax II 7900 - 1st Generation (sprayer series 248700–248703) where the piston seat is listed as 249-177 (replaces 240-580).
  • Functional replacement for OEM part number 240580 (Bedford aftermarket 58-2680.

Fitment based on published GMax II 7900 1st Gen parts listings. Check your exact pump manual for confirmation.

Technical Specifications

Aftermarket Bedford 58-2680
OEM 240580 (piston valve / seat reference)
FitsGMax II 7900 1st Gen (refer to 249-177 piston seat line item)
TypePiston valve / seat component for displacement pump
MaterialHardened seat component with precision-machined sealing face
FunctionMaintains one-way flow at the piston interface; stabilizes outlet pressure
PressureUse within sprayer’s rated working pressure per the equipment manual
BrandBedford Precision Parts (Aftermarket for Graco)

Consult your specific pump manual for torque, lubrication and assembly orientation.

Installation Notes

  1. Depressurize; disconnect power/fuel and relieve fluid pressure fully.
  2. Disassemble the displacement pump per your GMax II 7900 service manual.
  3. Clean bores and seating faces; remove varnish or embedded debris.
  4. Install the piston valve/seat in the specified orientation; apply recommended lubricant.
  5. Reassemble and leak-test at low pressure; ramp to operating pressure and verify check action.

Pro tip: Replace packings and the mating piston/ball at the same service to maximize rebuild life.

When to Rebuild / Replace

  • Loss of prime or sluggish startup after storage.
  • Pressure fluctuation or pulsation at steady throttle.
  • Bypass past the seat due to wear or pitting.
  • Visible damage or erosion of the sealing surface.

Bedford vs OEM Comparison

FeatureBedford Aftermarket (58-2680)OEM (Graco)
Fit & InterfaceMatches OEM seat geometry for listed applicationsFactory component per model BOM
MaterialsPrecision-machined hardened seatOEM-specified composition
AvailabilityIf in stock, ships from Bedford Precision Parts in Bedford Hill, New York.Ships via Graco distribution
ValueCost-effective field service optionOEM program component

FAQs

Yes—58-2680 is referenced as the aftermarket alternative to OEM 240580 for the listed applications. Confirm against your model’s BOM.
GMax II 7900 (1st Generation) where the parts list calls out 249-177 piston seat (superseding 240-580). Check your exact manual to verify.
It’s good practice to inspect and replace mating components (piston, ball, packings) during the same service to ensure reliable sealing.
Follow the Graco service manual for torque values, orientation and approved lubricants or sealants for your pump family.
If in stock, orders ship from Bedford Precision Parts in Bedford Hill, NY via your selected carrier.