Quick Overview & Compatibility
Compatible Machines
- GMAX II 7900 Standard Lo-Boy
- GMAX II 7900 ProContractor Hi-Boy
Graco 17H867 Pump Cylinder – OEM Replacement
Graco 17H867 Pump Cylinder is the genuine OEM cylinder used on the 17H825 Endurance MaxLife Piston Pump for select GMAX II 7900 sprayers. Choosing the original cylinder restores sealing surface integrity, helps maintain prime, and supports long service life with Graco’s proven wear surface design.
Product Details
| OEM Brand | Graco |
| Part Number | 17H867 (Pump Cylinder) |
| Fits Pump Assembly | 17H825 Endurance MaxLife Piston Pump |
| Intended Sprayer Series | GMAX II 7900 (models listed above) |
| GTIN / UPC | 755652850977 |
| What’s Included | 1 × 17H867 Pump Cylinder (no rods, packings, or seals) |
When Should You Replace the Cylinder?
- Persistent scoring, pitting, or wear on the cylinder bore.
- Repeated packing failures or loss of prime despite correct assembly.
- Pump output pulsation or poor pressure stability after routine maintenance.
Installation Notes
- Fully depressurize and flush the sprayer before disassembly; follow the owner’s manual.
- Use new OEM packings/seals during reassembly for best results.
- Lightly lubricate packings; tighten fasteners to the torque values specified by Graco.
- After install, pressure-test with water or compatible solvent before returning to service.
Frequently Asked Questions
It fits GMAX II 7900 Standard Lo-Boy and GMAX II 7900 ProContractor Hi-Boy configurations that use the 17H825 pump. Always verify your exact pump assembly in the owner’s manual or current parts list before ordering.
The cylinder renews the wear surface for the piston/packings. A complete pump (e.g., 17H825) includes rod, packings, valves, and housing—best when multiple components are worn or time is critical.
Yes. Always install new OEM packings and inspect the rod for wear to prevent premature leaks and extend service life.
Match your pump assembly (17H825) and model series (GMAX II 7900) in the parts manual. You can also cross-check by GTIN 755652850977 or contact support with your sprayer’s serial number.
