Titan part 315-951 is a pump cylinder used in the fluid pump section of compatible Hydra airless sprayers. It houses the displacement rod and packings, providing the chamber where paint is drawn in and pressurized. A worn or scored cylinder can cause pressure loss, fluid leakage, and reduced spray performance. Replacing the pump cylinder restores proper sealing and pump efficiency.
| Part Number | 315-951 |
|---|---|
| Part Description | Pump Cylinder |
| Brand | Titan |
| Fits | Hydra M 2000, Hydra M 4000, Hydra Pro Super |
| Condition | New |
The Titan 315-951 Pump Cylinder is a precision‑honed component that forms the pressure chamber of the fluid pump. Together with the displacement rod and packings, it creates the reciprocating pumping action that draws paint in and forces it out at high pressure. On Hydra M‑series and Hydra Pro Super sprayers, a smooth, undamaged cylinder wall is essential for maintaining seal integrity and consistent output.
Over time, abrasive materials or contamination can score or wear the cylinder bore, leading to fluid bypass, pressure loss, and leakage past the packings. Replacing a worn or damaged cylinder with this genuine Titan part restores the correct bore finish, allowing the packings to seal effectively and the pump to deliver rated pressure.
| Pressure chamber | Provides the bore where paint is drawn in and pressurized |
|---|---|
| Seal surface | Works with packings to prevent fluid bypass and maintain pressure |
| Structural component | Houses the displacement rod and forms the pump’s fluid path |
| Pressure loss | Sprayer cannot maintain pressure even after repacking |
|---|---|
| Fluid leakage | Paint leaking from the pump packing area due to worn cylinder bore |
| Visible scoring | Scratches, pits, or grooves visible inside the cylinder bore |
| Pump rebuild | Recommended to replace cylinder when overhauling the pump to ensure new packings seal properly |
Titan part 315-951 is a direct replacement pump cylinder for the following Titan Hydra airless paint sprayers. Always verify fitment using the parts diagram for your exact model and revision.
| Titan Hydra Model | Component |
|---|---|
| Hydra M 2000 | Pump cylinder |
| Hydra M 4000 | Pump cylinder |
| Hydra Pro Super | Pump cylinder |
When replacing the pump cylinder, it is standard practice to also renew the components that interact with it to ensure a complete and reliable repair.
The rod moves inside the cylinder; any wear or scoring on the rod will quickly damage new packings and the cylinder.
Includes all seals, o‑rings, and packings that seal between the rod and cylinder. Always replace when rebuilding the pump.
Worn valves can cause pressure loss and may need replacement during a full pump service.
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