Part number 0509590 is a genuine piston bushing used in Helix, Impact, Impact X, RentSpray, and SprayTech airless sprayers. This bushing serves as a wear surface between the piston and connecting rod or drive mechanism, reducing friction and maintaining proper alignment during pump operation. A worn or elongated bushing can cause piston misalignment, increased friction, loss of pressure, and accelerated wear of surrounding components. This genuine replacement bushing restores smooth piston movement and reliable pump performance.
| Part Number | 0509590 |
|---|---|
| Part Description | Piston Bushing |
| Brand |
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| Fits |
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| Condition | New |
The 0509590 Piston Bushing is a genuine OEM wear component designed for a wide range of airless sprayers including Helix, Impact, Impact X, RentSpray, and SprayTech models. This precision-machined bushing fits between the piston and the connecting rod or drive linkage, providing a low-friction bearing surface that allows the piston to move freely while maintaining precise alignment.
In reciprocating pump designs, the piston bushing absorbs lateral forces and reduces wear on both the piston and the connecting rod. It is manufactured from durable materials engineered to withstand the high cyclic loads and friction encountered during continuous sprayer operation. Proper bushing condition is essential for smooth pump action, consistent pressure output, and preventing premature wear of the piston and drive components.
Over time, the bushing can wear, become elongated, or develop play due to normal use, contamination, or inadequate lubrication. A worn bushing can cause the piston to wobble or misalign, leading to increased friction, reduced efficiency, seal damage, and eventually pump failure. Replacing a worn bushing with this genuine part restores proper fit, reduces friction, and extends the life of the entire pump assembly.
| Friction reduction | Provides a low-friction bearing surface between piston and connecting rod |
|---|---|
| Alignment maintenance | Keeps piston properly aligned within the pump cylinder |
| Wear protection | Prevents metal-to-metal contact, extending component life |
| Load distribution | Distributes lateral forces evenly across the piston assembly |
| Visible wear / elongation | Bushing hole is oval-shaped or enlarged |
|---|---|
| Excessive play | Piston moves side-to-side or feels loose in the bushing |
| Knocking noise | Audible knocking from pump area during operation |
| During piston service | Always inspect and replace bushing when servicing piston or connecting rod |
Part 0509590 is compatible with the following sprayer models. Always verify your machine's parts diagram to confirm correct fitment.
| Brand / Model | Component |
|---|---|
| Helix (Model No. 0138040) | Piston Bushing |
| Helix (Model No. 0138065) | Piston Bushing |
| Impact 340 | Piston Bushing |
| Impact 400 | Piston Bushing |
| Impact 410 | Piston Bushing |
| Impact 440 | Piston Bushing |
| Impact 640 I | Piston Bushing |
| Impact 640 IA | Piston Bushing |
| Impact X 410 | Piston Bushing |
| Impact X 440 | Piston Bushing |
| Impact X 540I | Piston Bushing |
| RentSpray 500 | Piston Bushing |
| RentSpray 600 | Piston Bushing |
| SprayTech GPX 750 | Piston Bushing |
| SprayTech 80 | Piston Bushing |
| SprayTech LCX 750 | Piston Bushing |
When replacing the piston bushing, it's good practice to inspect these related components, as they often wear out or are removed during the same repair.
Inspect the piston for scoring, wear, or damage. A worn piston may also need replacement.
Check the connecting rod bearing surface and rod end for wear. Replace if damaged.
Worn bushings can cause seal damage. Inspect and replace piston seals if necessary.
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