Graco 15A050 Pump Cylinder – Detailed Description
The Graco 15A050 Pump Cylinder is a critical OEM component crafted to house the internal fluid‑section elements of your Graco pump. Designed with precision machining and robust materials, this cylinder ensures optimal alignment for the internal piston, diaphragm, seal, and shaft assemblies — delivering reliable, long-term performance in high-demand environments.
Key Features
- Authentic OEM part built to Graco’s factory specifications
- Heavy-duty metal construction for durability and longevity
- Precisely machined bore to maintain correct alignment
- Supports frequent cycling in high-pressure pump systems
- Simplifies full rebuilds by offering a direct‑fit replacement
Common Applications
- Graco industrial diaphragm pumps
- Fluid delivery systems requiring consistent pressure
- Pumps used in chemical transfer, coatings, or solvent applications
- Maintenance cycles where a full or partial rebuild is performed
Installation & Maintenance Guidelines
Replacing the cylinder requires careful handling and assembly practices to protect internal components and ensure optimal performance.
- During disassembly, mark and document internal component placement for proper reassembly.
- Clean the new cylinder bore and mating parts to eliminate any debris.
- Inspect and, if necessary, replace related components such as piston shafts, O‑rings, and seals.
- Lubricate surfaces lightly with compatible lubricant before installation.
- Reassemble with even torque on fasteners and test the pump at low pressure before resuming full operation.
Signs It’s Time to Replace the Cylinder
- Scoring, pitting, or corrosion inside the cylinder bore
- Reduced pump performance or fluid output
- Internal leaks or inconsistent diaphragm behavior
- Frequent rebuilds showing wear on sealing surfaces
- Visible damage or deformation of the original cylinder
Technical Specifications
| Parameter |
Details |
| Part Number |
15A050 |
| Component Type |
Pump Cylinder (Fluid Section) |
| Material |
High-strength alloy / industrial-grade metal |
| Function |
Housing for piston, diaphragm, shaft, and seals |
| Use Case |
High-cycle, high-pressure Graco pumps |
Benefits of Using the OEM Cylinder
Opting for the genuine Graco 15A050 cylinder ensures that your pump operates as originally designed, delivering optimal alignment and longevity for critical internal parts.
- Maintains factory-built tolerances for perfect part alignment
- Reduces wear on internal components by preserving precise geometry
- Minimizes downtime by providing a drop-in OEM replacement
- Helps avoid leaks or performance loss due to cylinder imperfections
- Supports long-term reliability when combined with other OEM rebuild parts
Frequently Asked Questions
It acts as the primary enclosure for the fluid‑section internals, providing structure and alignment for the piston, shaft, diaphragm, and sealing components.
Reusing a worn cylinder is not recommended—any scoring or wear inside the bore can compromise pump performance and shorten the life of internal parts.
Replace it during a major rebuild, especially if you observe wear, leaking, or reduced performance in the pump fluid section.
It often helps, but for best results, inspect and replace other related parts like seals, pistons, and shafts to ensure a truly reliable rebuild.
