Replaces Graco 240919 Piston Rod – GMAX 7900, GH 200 & Ultra Max II 1895

Replaces Graco 240919 Piston Rod – GMAX 7900, GH 200 & Ultra Max II 1895

Restore the fluid section on your Graco airless paint sprayer with this aftermarket piston rod that replaces Graco Part #240919 / 240-919.

The piston rod is a critical working component inside the displacement pump. A worn, scored, pitted, or damaged rod can cause packing leakage, premature packing failure, pressure loss, and poor pump performance.

This quality aftermarket piston rod is designed for several high-output Graco professional airless sprayers, including the GMAX 7900, GMAX II 7900, GH 200, and Ultra Max II 1895.

Part Information:

• Replaces Graco Part Number: 240919 / 240-919
• Product: Displacement Pump Piston Rod
• Type: Aftermarket
• Application: Airless Paint Sprayer Fluid Section / Displacement Pump
• Brand Compatibility: Graco

Fits Graco Airless Paint Sprayers:

• GMAX 7900
• GMAX II 7900
• GMx 7900
• GH 200
• Ultra Max II 1895

It may fit additional Graco displacement pumps that specify Part #240919. Always verify the original piston rod part number before ordering.

Features:

• Replaces Graco 240919 / 240-919
• Displacement pump piston rod
• Precision working surface for the fluid pump packings
• Fits Graco GMAX 7900 and GMAX II 7900 sprayers
• Fits Graco GH 200
• Fits Graco Ultra Max II 1895
• Quality aftermarket component
• Ideal for fluid pump rebuilding and repair
• Helps prevent premature failure of new pump packings
• Economical alternative to replacing the complete displacement pump
• Helps keep older professional Graco equipment in service

What the Piston Rod Does

The piston rod travels continuously through the pump packings as the displacement pump cycles. The rod and packings work together to create the seal necessary for the pump to develop the high fluid pressures required for airless spraying.

Because the packings ride directly against the piston rod, the condition of the rod's working surface is extremely important.

Abrasive coatings, contamination, dried material, corrosion, and normal operating wear can eventually cause the rod to become scored, grooved, pitted, or worn. Once the surface is damaged, installing new packings alone may result in another premature packing failure.

Common Signs of a Worn Piston Rod:

• Fluid leaking from the upper packings
• Visible scoring or grooves on the rod
• Pitting or corrosion
• New packings begin leaking prematurely
• Difficulty maintaining spray pressure
• Excessive packing adjustment
• Reduced or inconsistent pump performance
• Fluid section requires frequent rebuilding

Rebuilding Your Graco Fluid Pump

When rebuilding the displacement pump, inspect the piston rod carefully before installing new packings.

A quick practical check is to run your fingernail across the working surface. If you can feel grooves, scoring, pitting, or other damage, the new packings will be running across those imperfections every time the pump cycles.

While the fluid section is apart, inspect the:

• Piston rod
• Cylinder or sleeve
• Upper and lower packings
• Packing glands
• Inlet and outlet balls
• Ball seats
• O-rings and seals

Replacing worn hard parts during a pump rebuild can greatly improve the chances of getting a long-lasting repair.

Keeping Older Graco Sprayers Working

The GMAX 7900, GH 200, and Ultra Max II 1895 are serious professional machines, and a worn fluid section doesn't necessarily mean the entire sprayer needs to be replaced.

Rebuilding the displacement pump and replacing worn hard parts such as the piston rod can often keep an older machine productive for years.

That's why we include the original Graco part number and compatible sprayer models whenever possible—making it easier to identify the correct repair parts before ordering.

Important:

This listing is for one aftermarket piston rod that replaces Graco Part #240919 / 240-919.

This is an aftermarket component and is not manufactured by Graco.

Because different generations and series of similar Graco sprayers may use different displacement pump components, always verify the original 240919 part number for the pump currently installed on your machine before ordering.

Need help identifying pump parts for your Graco airless sprayer? Contact us with your sprayer model, series, or original part number—we'll help you find the correct parts to keep your equipment working.