Graco 15A051 Cylinder Cover – Detailed Description
The Graco 15A051 Cylinder Cover is a high‑precision OEM component designed to seal the internal side of the pump’s fluid cylinder. Built to Graco’s original factory specifications, this cover helps preserve alignment, protect internal components, and maintain reliable fluid containment during operation.
Core Features
- Genuine Graco OEM part ensures perfect compatibility
- Rugged metal construction for long-term durability
- Seals against contamination and helps prevent internal leaks
- Maintains correct alignment and positioning of piston, shaft, and diaphragm
- Enables stable, reliable operation in high-pressure, cyclical pump environments
Typical Use Cases
- In diaphragm pump maintenance and rebuilds
- When restoring pump internals to factory condition
- In systems handling coatings, solvents, or harsh fluids
- Industrial applications where high pressure and frequent cycling occur
Installation & Replacement Advice
To install or replace the 15A051 Cylinder Cover properly, follow best practices to protect your pump’s internal fluid chamber and extend the service life of all components.
- When disassembling, note the position of internal parts to ensure proper reassembly.
- Clean mating surfaces thoroughly to avoid introducing debris.
- Inspect the existing cover and surrounding components for wear or damage.
- Install the new cover with even torque on fasteners to avoid warping.
- After reassembly, run the pump at reduced pressure to test for proper sealing and alignment.
Warning Signs That It Should Be Replaced
- Visible corrosion or pitting on the cover’s surface
- Warping or deformation that prevents proper sealing
- Fluid leaks from inside the cylinder
- Unstable or misaligned pistons during operation
- Poor performance or increased cycling noise after long use
Technical Details
| Specification |
Detail |
| Part Number |
15A051 |
| Component Type |
Pump Cylinder Cover (Internal) |
| Material |
Hardened metal / alloy compatible with pump internals |
| Primary Function |
Seal and protect the fluid cylinder internals |
| Application |
Industrial and high-pressure Graco diaphragm pumps |
Why Use the OEM 15A051 Cover?
Opting for the genuine Graco 15A051 Cylinder Cover ensures that your pump maintains its original design integrity, helping to deliver consistent performance, safe operation, and long-term dependability.
- Preserves factory-aligned geometry for optimal performance
- Reduces risk of contamination and internal wear
- Ensures leak-tight sealing even under pressure
- Makes rebuilds smoother by matching original parts exactly
- Helps maximize the lifespan of your Graco pump
Frequently Asked Questions
It seals and protects the internal section of the pump cylinder, ensuring alignment and preventing fluid leakage or contamination.
Yes — replacing it during a rebuild is recommended to ensure sealing integrity and optimal alignment of internal components.
While alternatives may exist, using a non‑OEM cover can risk poor fitment, misalignment, and reduced lifespan of internal parts.
Inspect the cover during every major rebuild or when you disassemble the fluid section, especially if there are signs of leaking or internal wear.
