The PowrLiner 0290349 Knob Assembly is an original equipment replacement part designed for multiple PowrLiner airless sprayer models. This knob typically controls pressure adjustment, priming, or other critical settings, providing a positive grip and smooth rotation for precise operation.
Over time, knobs can become cracked, worn, or broken due to frequent use, impact, or exposure to chemicals. A damaged knob makes accurate adjustment difficult and can compromise control of the sprayer. Replacing the knob assembly restores full functionality and ensures safe, accurate operation.
| Pressure control | Adjusts spray pressure by turning a valve or potentiometer |
|---|---|
| Operational interface | Provides ergonomic grip for precise adjustments during spraying |
| Visual indication | Often includes markings or pointer for setting reference |
| Cracked or broken | Visible damage that affects grip or structural integrity |
|---|---|
| Missing knob | Knob has fallen off or been lost |
| Worn splines / bore | Internal splines stripped, causing slipping on shaft |
| Difficult to turn | Binding or stiffness due to knob deformation or debris |
PowrLiner part 0290349 is compatible with the following PowrLiner airless sprayers. Always confirm fitment using the correct parts diagram for your exact model and revision.
| PowrLiner Model | Component |
|---|---|
| PowrLiner 3500 72v | Knob assembly |
| PowrLiner 3500 | Knob assembly |
| PowrLiner 3500s | Knob assembly |
| PowrLiner 4500 | Knob assembly |
| PowrLiner 5500 | Knob assembly |
| PowrLiner 4950 | Knob assembly |
| PowrLiner 6955 | Knob assembly |
| PowrLiner 8950 | Knob assembly |
When replacing the knob, inspect these associated components for wear or damage.
The shaft that the knob attaches to; check for damage or corrosion.
If the knob has markings, ensure the panel markings are legible.
Set screws or nuts that secure the knob; replace if missing or stripped.
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