Graco 189857 Pump Cylinder

Graco 189857 Pump Cylinder is a genuine OEM replacement for Dura-Flo 750 pumps, ensuring precise pressure and smooth coating flow. Perfect for restoring pump efficiency and durability.

Compatible with Dura-Flo 750 (180 cc lower)
Replaces worn or damaged pump cylinder assembly
Maintains factory performance and reliability
High-strength construction for industrial use

$1755

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Description

Compatibility & Key Details

Compatible Machines

The Graco 189857 Pump Cylinder is designed for the Dura-Flo series. Confirm your exact pump model before ordering.

Graco Dura-Flo 750 pumps (180 cc lower)

Product Overview

The Graco 189857 Pump Cylinder (fluid cylinder/lower body) is a genuine OEM replacement component for high-pressure coating pumps. It forms the main fluid chamber that the piston operates within, helping maintain pressure, flow consistency, and sealing integrity during operation.

Item	Details
Part Number	189857
Component	Pump Cylinder (Fluid Cylinder / Lower)
Pump Family	Dura-Flo 750 (verify against your model’s parts list)
Displacement (family ref.)	750 series lower ≈ 180 cc (for reference/fit context)
Use Case	Restores proper pressure/flow after cylinder wear or damage

Fitment Notes

Always confirm by model/serial and the official Graco parts list before purchase.
Only for lowers that specifically call out 189857. Different lowers within the Dura-Flo family may use different cylinders.
Installation should follow Graco procedures; replace related seals/packings if required.

Why Choose Genuine Graco

OEM quality for durability and pressure retention.
Exact tolerances to protect pistons, packings, and seats.
Maintains factory performance for high-pressure coating applications.

Frequently Asked Questions

Typically, the cylinder is supplied as the cylinder body. Seals/packings are separate kits unless explicitly stated. Check your parts list to see if a packing kit is recommended during cylinder replacement.

No. Fitment is specific. It is intended for Dura-Flo 750 lowers that list 189857. Other Dura-Flo sizes (e.g., 600/900/1200) can use different cylinders. Always match the part number in your manual.

Persistent pressure loss, uneven spray, internal scoring, or repeated packing failures can indicate a worn or damaged cylinder. Inspect the bore for wear and verify piston/seat condition.

Follow Graco torque and assembly procedures, use appropriate lubricants, and replace wear items (packings/seals) as recommended. After assembly, test for leaks and verify operating pressure.

Yes—Graco 189857 is a genuine OEM component when sourced from authorized distributors. Using OEM parts helps maintain performance and safety in high-pressure systems.