Bedford 57-2131 Cylinder is Graco 236786 aftermarket replacement

Graco 236786 Cylinder — AfterMarket by Bedford Precision for 390ST / 390STS (Bedford 57-2131)

This precision-machined cylinder is an AfterMarket by Bedford Precision Parts replacement for the Graco 236786 (236-786). It restores smooth pump performance in compact contractor sprayers, helping your unit prime quickly, hold pressure, and deliver a consistent finish.

Where it fits & how it’s used

• Fits: Graco 390ST and 390STS airless sprayers (fluid/pump lower).
• Function: The cylinder houses the piston rod and packings in the fluid section, maintaining tight clearances for efficient pressure buildup and long seal life.
• Cross-reference: Graco 236786 / 236-786 ⇄ Bedford 57-2131.

Why choose this aftermarket cylinder

• Direct-fit dimensions match the original for quick, straightforward installation.
• Hardened, precision bore supports reliable sealing under pulsating pump loads.
• Durable construction stands up to routine jobsite use and common coatings.

Install tips

• Inspect the rod and packings; replace worn parts to protect the new cylinder.
• Use compatible assembly lube and proper torque/thread sealant per your service manual.
• After reassembly, flush, prime, and test at operating pressure for leaks and pressure stability.

This is a high-quality aftermarket replacement manufactured by Bedford Precision for the OEM specification listed above.

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