SprayTech part 0278303 is a cam, prime spray – a mechanical component inside the prime / pressure relief valve assembly of compatible SprayTech airless sprayers. It converts rotational motion from the prime valve knob into linear movement that opens the relief valve, allowing the system to be depressurized or switched between spray and prime modes.
| Part Number | 0278303 |
|---|---|
| Part Description | Cam, Prime Spray |
| Brand | Titan |
| Fits |
SprayTech Airless EP2105, EP2205 |
| Condition | New |
The SprayTech 0278303 Cam, Prime Spray is a small but critical component inside the prime / pressure relief valve assembly. When you rotate the prime knob (or switch between SPRAY and PRIME modes), the cam pushes against a plunger or valve stem, opening the relief passage to depressurize the system. This allows safe tip changes, cleaning, and startup.
Over time, the cam can wear, crack, or deform, causing the prime valve to become stiff, not fully seat, or fail to relieve pressure. Replacing a worn cam restores smooth operation of the prime valve and ensures proper pressure relief for safe sprayer use.
| Mode switching | Converts knob rotation between SPRAY and PRIME positions |
|---|---|
| Pressure relief | Opens the relief valve to depressurize the system |
| Sealing assist | Helps seat the valve in SPRAY mode to prevent bypass |
| Mechanical durability | Hardened cam surface resists wear from repeated cycles |
| Stiff or gritty rotation | Prime knob does not turn smoothly or binds |
|---|---|
| Failure to depressurize | Sprayer stays pressurized in PRIME mode, causing tip spray when loosened |
| Visible cam damage | Cracks, flattened lobes, or deep grooves on the cam surface |
| Leakage in SPRAY mode | Pressure loss due to cam not fully seating the relief valve |
SprayTech 0278303 is compatible with the following SprayTech airless sprayer models. Always verify fitment using the correct parts diagram for your exact machine.
| Brand / Model | Component |
|---|---|
| Airless EP2105 | Cam, prime spray |
| Airless EP2205 | Cam, prime spray |
When replacing the prime spray cam, inspect these associated components to ensure complete and reliable prime valve operation.
The plunger rides against the cam; wear or bending can cause poor sealing.
A worn seal will leak pressure even with a new cam.
A cracked knob or missing clip can cause misalignment and cam wear.
Copyright © 2024 AlltitanParts.com - All Rights Reserved.
