Product Overview & Specs
Compatible Machines
This Graco 249000 Piston Rod Repair Kit is an OEM repair kit used on select heavy-duty Graco pumps. Confirm your exact model generation before ordering.
- GMax 7900 (early / first-generation variants)
- GH 200 Convertible pump models
- LineLazer 200HS (certain configurations)
What is the Graco 249000 Piston Rod Repair Kit?
The 249000 kit (often described as “KIT, REPAIR, ROD, PISTON”) replaces a worn or damaged piston rod in the fluid section. It typically includes a new Chromex/hardened piston rod and required hardware/seals to restore pump performance and reduce leaks.
Why & When You Need It
- Excessive wear scoring on the rod or premature seal wear/leakage
- Loss of pressure, pulsation, or reduced output volume
- Corrosion from water-borne coatings or harsh jobsite conditions
- Preventive maintenance during major pump service
Key Details & Specifications
| Part Number | 249000 |
| Item Type | Piston Rod Repair Kit (OEM) |
| Rod Surface | Chromex / Hardened for wear & corrosion resistance |
| Typical Contents | Piston rod plus associated seals/hardware (varies by revision) |
| Use Case | Restores sealing, pressure stability, and pump longevity |
| Compatibility Notes | Verify model generation (e.g., GMax vs. GMax II) and serial range |
Installation & Best Practices
- Clean the fluid section thoroughly and inspect seats, balls, and packings.
- Lubricate new seals with compatible pump armor or light machine oil.
- Follow torque specs from the official Graco service manual; apply threadlocker only where specified.
- After assembly, prime with water/solvent and pressure-test for leaks before spraying.
Frequently Asked Questions
Not typically. GMax II generations may use different piston rods/kits. Confirm using your exact model year and the official parts list before ordering.
Chromex/hardened surfaces improve wear and corrosion resistance, helping seals last longer and reducing scoring that can cause leaks or pressure loss.
Persistent fluid leaks, rod scoring, inconsistent pressure, or rapid packing wear are common signs the piston rod assembly needs replacement.
It’s good practice to inspect/replace packings, balls, and seats during rod service. If your kit doesn’t include them, add the correct packing or valve kits.
Match your model name, generation (e.g., GMax vs. GMax II), and serial range to the official Graco parts breakdown. Contact support if uncertain.
