Graco 17H878 MaxLife Vortex Piston Rod

Genuine OEM Part – Built for durability and precision.
Features advanced MaxLife Vortex technology for extended wear life.
Designed for GMax II 7900 series sprayers.
Ensures consistent spray performance and reduced maintenance downtime.

Retail Price: $1235

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Description

Graco 17H878 MaxLife Vortex Piston Rod - What It Is & What It Fits

Compatible Machines

• Graco GMax II 7900 (Standard)
• Graco GMax II 7900 ProContractor

Tip: Always confirm your exact sprayer model & pump assembly in the parts manual before ordering.

What is the Graco 17H878 MaxLife Vortex Piston Rod?

The 17H878 is a genuine Graco pump piston rod engineered with MaxLife Vortex technology. The Vortex design rotates the rod during operation to distribute wear evenly, extending service life and helping maintain consistent spray performance. It’s the OEM replacement rod used with the Endurance / MaxLife Vortex pump architecture found on high-output Graco gas sprayers like the GMax II 7900 series.

Even wear from the Vortex rotating action for longer life between repacks
Maintains steady pressure and a uniform fan pattern
OEM fit and finish for reliable sealing and durability

Key Specs & Details

Part Number	17H878
Technology	MaxLife Vortex rotating piston rod
Pump Assembly Association	Used as the replacement rod for Graco pump assembly 17H825 (GMax II 7900 family)
Category	OEM pump piston rod for large gas airless sprayers
Compatibility Notes	Designed for GMax II 7900 series. Verify pump code & revision in your parts list before purchase.
What’s Included	Piston rod only (no seals/packings). Pair with the correct cylinder & packing kit for a full rebuild.

Fitment & Replacement Guidance

Confirm your sprayer model (e.g., GMax II 7900 Standard or ProContractor).
Check your pump assembly number (commonly 17H825 on 7900 series) in the parts manual.
Inspect cylinder & packings; replace as a set to maximize MaxLife Vortex service life.

If your pump has heavy wear or scoring, consider a full pump kit instead of rod-only replacement.

Frequently Asked Questions

Match your sprayer model (e.g., GMax II 7900) and pump assembly (e.g., 17H825) in the official parts manual. If your pump assembly matches, the rod is correct.

The Vortex rod slowly rotates during operation to distribute contact and reduce localized wear, increasing time between repacks and helping maintain a consistent fan pattern.

It’s best practice to inspect and often replace the cylinder and packing kit at the same time. Mixing new and worn parts can shorten service life.

Yes, 17H878 is a genuine Graco OEM piston rod designed for the Endurance / MaxLife Vortex pump used on GMax II 7900 series sprayers.