

The Graco 866307 Ball Retainer secures the valve ball in piston pump assemblies, ensuring correct flow direction and reliable pump operation.
The Graco 866307 Retainer, Ball, .3125, SL is a genuine OEM hydraulic component that holds the ball in place within a valve assembly in pump systems. It ensures proper valve function and contributes to reliable fluid control.
This ball retainer is referenced in several OEM pistons/valve assembly parts diagrams for Graco pump and sprayer systems, where it secures the valve ball in place:
| Part Number | 866307 |
|---|---|
| Component Type | Ball retainer |
| Ball Size | 0.3125″ (5/16″) |
| Function | Holds valve ball in position |
| Use | Valve assemblies in pump/sprayer systems |
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