Graco 15A056 Air Valve Bushing – Detailed Description
The Graco 15A056 Air Valve Bushing is a factory-grade OEM component crafted to optimize the internal alignment and performance of the air-valve mechanism in Graco diaphragm pumps. It ensures fluid switching efficiency while minimizing wear, playing a crucial role in sustaining reliable and smooth pump cycles.
Key Features
- OEM-level precision for perfect compatibility with Graco air-valve assemblies
- Low-friction, machined bore for minimal internal wear
- Stabilizes internal air‑valve components for consistent switching
- Built from a high-durability metal to handle frequent high-pressure cycling
- Supports tight air-seal control to maintain efficient pump operation
Typical Use Cases
- Air‑operated diaphragm pump rebuilds and maintenance
- Pumps used in high-cycle industrial fluid delivery systems
- Applications involving coatings, chemicals, or aggressive fluids
- Systems requiring long-term reliability in valve performance
Installation & Service Instructions
To install the 15A056 bushing effectively, take care to prepare the air-valve assembly properly and handle internal parts with precision.
- Disassemble the air-valve and clean all components thoroughly to remove old debris or residue.
- Inspect the bushing bore and surrounding surfaces for any signs of damage.
- Install the new bushing flush and aligned within the valve body.
- Reassemble valve components with correct torque and alignment.
- Cycle the pump slowly after installation to check for proper valve operation and absence of air leakage.
When to Replace the Bushing
- Poor or erratic cycling of the pump
- Elevated air consumption or reduced pump efficiency
- Visible wear or scoring inside the bushing bore
- Delayed or inconsistent switching of the air valve
- Degraded performance despite healthy fluid-section components
Technical Specifications
| Specification | Detail |
| Part Number | 15A056 |
| Component Type | Air Valve Bushing |
| Material | High-strength alloy engineered for valve wear resistance |
| Function | Aligns and supports moving air-valve internals |
| Application | Graco diaphragm / AODD pumps |
Advantages of the OEM 15A056 Bushing
Using the genuine Graco 15A056 Air Valve Bushing is beneficial for maintaining valve precision and extending the operational life of your pump’s air section.
- Ensures stable, accurate alignment of air‑valve components
- Minimizes internal wear for longer valve life
- Reduces risk of air leaks, improving efficiency
- Restores original manufacturer tolerances after rebuild
- Makes maintenance quicker and more reliable with exact-fit parts
Frequently Asked Questions
It supports and guides the internal air-valve components, ensuring smooth, efficient cycling and reducing wear inside the air valve.
Replace it if the pump exhibits erratic cycling, increased air consumption, or if the old bushing shows scoring or wear.
Skipping it is possible, but using a fresh, OEM-grade bushing helps restore optimal valve performance and longevity.
Not always — ensure your pump’s parts diagram specifies part number 15A056 before using it for a rebuild.
