Impact part 805-247A is a piston assembly used to rebuild the pumping section on compatible sprayers. This assembly restores proper fluid pressure and consistent material flow by replacing worn or damaged piston components. When the piston fails to maintain pressure or shows signs of wear, this kit provides the necessary components to return the unit to reliable operating condition.
| Part Number | 805-247A |
|---|---|
| Part Description | Piston Assembly |
| Brand | Impact |
| Fits | Impact 1040, Impact 1140, Impact 1140 I, Impact 1140 IA |
| Condition | New |
The Impact 805-247A Piston Assembly serves as the heart of the fluid section on compatible Impact airless sprayers. This component drives the reciprocating action that pulls coating material from the container and pressurizes it for precise application. As the sprayer accumulates hours of operation, the piston naturally experiences wear from friction, abrasive materials, and the constant cycling of the pump. This wear manifests as diminished pressure output, surging during spraying, or the inability to establish prime altogether. Replacing a worn piston with this assembly restores the original hydraulic integrity of the pumping system. The result is consistent pressure delivery, reduced strain on the drive motor, and extended equipment longevity. Manufactured to original equipment specifications, this assembly provides a straightforward, direct replacement that eliminates compatibility concerns. For service technicians and equipment owners alike, maintaining the piston assembly represents a fundamental aspect of preventive maintenance. When paired with fresh seals and routine fluid section care, this component ensures the sprayer performs reliably across a range of coating types, from thin stains to heavy-bodied paints. Users who regularly spray demanding materials or operate in harsh job site conditions will find particular value in keeping the piston assembly in optimal condition, as it directly influences both productivity and finish quality.
| Fluid pressurization | Creates the reciprocating action that draws and pressurizes coating material |
|---|---|
| Pressure consistency | Maintains steady output pressure for uniform spray application |
| Priming function | Enables the pump to draw material from the container and establish prime |
| Pressure loss | Inability to maintain pressure or surging during operation |
|---|---|
| Priming failure | Pump will not prime or loses prime frequently |
| Visible scoring | Scratches, wear marks, or pitting on the piston surface |
| Erratic spray | Inconsistent fan pattern or spitting that is not corrected by tip replacement |
Impact part 805-247A is compatible with the following Impact airless paint sprayers. Always verify fitment using the parts diagram for your specific model and revision.
| Impact Model | Component |
|---|---|
| Impact 1040 | Piston assembly |
| Impact 1140 | Piston assembly |
| Impact 1140 I | Piston assembly |
| Impact 1140 IA | Piston assembly |
When rebuilding the fluid section, these components are frequently inspected and replaced alongside the piston assembly to ensure complete restoration.
Worn seals are a common cause of pressure loss and should be replaced when installing a new piston.
Inspect the cylinder bore for scoring or damage that could compromise seal performance.
Valve assemblies that are worn or contaminated can prevent priming and pressure retention.
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