

Part number 0290513A is a Fluid Section Assembly that pumps and pressurizes coating material for compatible Powerliner line striping systems. This complete assembly includes the piston rod, packings, cylinders, and inlet/outlet valves necessary for reliable fluid delivery.
| Part Number | 0290513A |
|---|---|
| Part Description | Fluid Section Assembly |
| Fits | Powerliner 2850 GB_D_F |
| Condition | New |
Part number 0290513A is a complete Fluid Section Assembly specifically engineered for the Powerliner 2850 GB_D_F airless line striping system. This assembly is the heart of the pumping mechanism, responsible for drawing coating material from the supply container, pressurizing it to operating levels, and delivering it to the spray gun for precise line application. The Powerliner 2850 operates at pressures up to 3300 PSI and is available in both single-gun and dual-gun configurations for parking lots, roadways, and athletic field marking. The fluid section assembly includes all critical wear components: the piston rod, upper and lower packings, cylinder, inlet valve assembly, and outlet valve assembly.
The fluid section is subjected to extreme mechanical stress and abrasive wear during operation. The piston reciprocates continuously within the cylinder, with the packings providing a high-pressure seal that prevents fluid bypass. The inlet and outlet check valves ensure one-way fluid flow, maintaining prime and consistent pressure. Over time, these components wear, leading to symptoms such as loss of pressure, surging output, external leaks, and difficulty priming. The complete fluid section assembly provides a factory-assembled, pre-tested replacement that eliminates the need for individual component sourcing and reduces service time.
Regular fluid section maintenance is essential for reliable striper performance. The service interval depends on usage intensity, material abrasiveness, and maintenance practices. When pressure loss or performance degradation occurs and cannot be resolved by valve cleaning or minor seal replacement, replacement of the complete fluid section assembly restores the Powerliner 2850 to like-new pumping capability. This OEM assembly ensures proper fit, correct material specifications, and reliable operation for professional line striping applications.
| Material Pumping | Draws coating from supply and pressurizes to 3300 PSI for application |
|---|---|
| Pressure Generation | Creates and maintains system pressure for consistent line quality |
| Flow Control | Check valves ensure proper fluid direction and prime retention |
| Loss of Pressure | Unable to reach or maintain normal operating pressure |
|---|---|
| Surging Output | Pressure fluctuates, causing uneven line application |
| External Leaks | Fluid weeping from packings or valve areas |
| Major Overhaul | Complete replacement during comprehensive pump rebuild |
Part number 0290513A is specifically designed for the Powerliner 2850 GB_D_F airless line striping system. This model is available in both single-gun and dual-gun configurations, both utilizing the identical fluid section assembly. The Powerliner 2850 delivers up to 3300 PSI operating pressure and is designed for professional parking lot, roadway, and athletic field marking applications. This fluid section assembly is a model-specific component engineered for the mounting configuration, flow characteristics, and pressure requirements of this particular sprayer system. Always confirm fitment using the correct parts diagram for your exact model and serial number.
| Compatible Models | Component |
|---|---|
| Powerliner 2850 GB_D_F | Fluid Section Assembly |
The fluid section assembly is the core pumping component. When servicing this assembly, these related parts are often inspected or replaced at the same time.
One-way valve controlling fluid entry. Included in complete fluid section assembly.
Discharge check valve preventing backflow. Included in complete assembly.
The reciprocating component that drives fluid displacement. Inspect for wear or scoring.