Titan part 317-984 is a piston seat assembly used in the fluid pump of compatible Hydra airless sprayers. It works with the valve ball to create a positive seal during the pressure stroke, preventing fluid bypass and maintaining consistent output. A worn or damaged seat can cause pressure loss, erratic spray, or poor priming. Replacing the piston seat assembly restores proper sealing and pump efficiency.
| Part Number | 317-984 |
|---|---|
| Part Description | Piston Seat Assembly |
| Brand | Titan |
| Fits | Hydra M 2000, Hydra M 4000, Hydra Pro Super |
| Condition | New |
The Titan 317-984 Piston Seat Assembly is a key component of the fluid pump valve system. It provides a precision‑machined surface against which the valve ball seals during the pressure stroke, preventing backflow and ensuring that paint is forced out through the spray tip. This assembly is critical for maintaining consistent pressure and reliable spray performance on Hydra M‑series and Hydra Pro Super sprayers.
Over time, the piston seat can become worn, pitted, or damaged by debris, causing the valve ball to seat improperly. Symptoms include pressure loss, erratic or pulsing spray, and difficulty priming. Replacing the piston seat assembly with this genuine Titan part restores the proper sealing surface and returns the pump to like‑new performance.
| Sealing surface | Provides a smooth, durable seat for the valve ball to seal against during the pressure stroke |
|---|---|
| Pressure holding | Prevents fluid from bypassing the piston, ensuring consistent output pressure |
| Valve timing | Works with the ball and cage to create clean opening and closing action |
| Pressure loss | Sprayer cannot maintain pressure; fluid bypasses the piston valve |
|---|---|
| Erratic spray | Intermittent or pulsing output even after cleaning filters and tips |
| Poor priming | Difficulty drawing fluid; may indicate the seat is not sealing |
| Visible damage | Pitting, nicks, or uneven wear on the seat surface |
Titan part 317-984 is a direct replacement piston seat assembly 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 | Piston seat assembly |
| Hydra M 4000 | Piston seat assembly |
| Hydra Pro Super | Piston seat assembly |
When replacing the piston seat, it is highly recommended to renew the other valve components to ensure a complete and reliable repair.
The ball mates with the seat; a worn or out-of-round ball will not seal properly, even with a new seat.
The cage guides the ball; if worn or cracked, it can cause misalignment and premature seat wear.
Inspect and replace any seals associated with the piston assembly to prevent external leaks.
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