0005311 is a piston spring used in the fluid section of compatible sprayers to return the piston after each stroke, ensuring consistent pumping action and pressure. This spring maintains proper tension for reliable operation. Replace a broken, weak, or corroded piston spring to restore pump performance and prevent erratic spraying.
| Part Number | 0005311 |
|---|---|
| Part Description | Piston Spring |
| Brand | Multi-Brand Compatible |
| Fits | AirSpray ProFinish AS 1130; Impact 1140, 1040, 1140I/IA; RentSpray 500, 600; SprayTech AirCoat, ED1150, ED2105, ED655 |
| Condition | New |
The 0005311 piston spring is a critical component inside the fluid section of compatible sprayers. It provides the return force that pushes the piston back after each forward stroke, enabling the pump to draw in material and maintain continuous, pressurized output. Without a properly functioning spring, the pump cannot complete its cycle effectively.
Over time, springs can weaken from metal fatigue, break from stress, or corrode due to chemical exposure. A weak or broken spring results in reduced pump output, loss of pressure, or complete failure to pump. Replacing a worn spring with this genuine part restores proper piston movement and ensures reliable sprayer performance.
| Piston return | Returns piston after each stroke to draw in fluid |
|---|---|
| Pressure maintenance | Helps maintain consistent pumping action |
| Cycle completion | Ensures full stroke cycle for proper output |
| Broken / cracked | Visible fracture in spring coils |
|---|---|
| Weak / sagging | Reduced tension; piston may not return fully |
| Corroded / rusted | Surface oxidation affecting spring integrity |
| During pump rebuild | Replace as preventive maintenance |
Part 0005311 is designed for use on the following models. Always verify fitment by consulting your machine's parts manual.
| Brand | Models |
|---|---|
| AirSpray | ProFinish AS 1130 |
| Impact | 1140, 1040 |
| 1140I / 1140IA | |
| RentSpray 500, 600 | |
| SprayTech | AirCoat |
| ED1150 | |
| ED2105 | |
| ED655 |
When replacing the piston spring, inspect these associated components to ensure complete system reliability.
Check piston for wear or scoring; replace if damaged.
Worn packings can cause pressure loss; replace during rebuild.
Inspect cylinder bore for scoring or wear.
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