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