Graco 240518 Piston Rod

The Graco 240518 Piston Rod is a vital drive component connecting the sprayer’s motor and pump for smooth paint delivery. Designed for heavy-duty professional sprayers, it ensures consistent flow and long service life.

OEM-quality replacement for Ultra Max II 695, 795, 1095
Compatible with GMax 3900 and LineLazer 3900 series
Durable construction minimizes wear and pulsation
Ideal for maintaining peak spray performance

Retail Price: $494

You save: $129.43 (26.20%)

Our Price: $364.57

Based on 0 reviews

Description

Compatibility at a Glance

Use the list below to quickly confirm whether the Graco 240518 Piston Rod fits your sprayer. Always verify against your parts manual or serial number.

Graco Ultra Max II 695
Graco Ultra Max II 795
Graco Ultra Max II 1095
Graco Ultra Max 695 / Ultra Max 795 (select versions)
Graco GMax 3900 (select versions)
Graco Ultimate MX II 695 / Ultimate MX II 795
Graco LineLazer 3900 (II / III / IV series; select models)
Graco EuroPro 1095 (select versions)
Graco Zip-Spray 3400G (select versions)
Graco RentalPro 360G (select versions)

What is the Graco 240518 Piston Rod?

The Graco 240518 Piston Rod (also referenced as 240-518) is a genuine OEM drive rod that links the sprayer’s motor/gearbox to the fluid piston. It converts the drive motion into the linear stroke that loads and discharges coating on each cycle—critical for smooth, consistent spray output.

Key Details & Cross-Reference

Part Number	240518 (aka 240-518)
Category	Pump / Drive Components — Piston / Drive Rod
Compatibility Notes	Model/series variations exist. Confirm by model, series, and serial range in the parts manual.
Typical Symptoms of Wear	Pulsation, reduced output, uneven pattern, unusual noise, or visible rod scoring/bending.
What’s Included	Piston rod only (installation hardware/seals sold separately unless noted by your kit).

When to Replace

Rod shows scoring, corrosion, or plating wear.
Bent rod or excessive play felt in the drive link.
Chronic pulsation or output drop after seal/packings are verified.

Installation Tips

Disconnect power and relieve pressure; follow the model-specific service manual.
Inspect packings, seats, and bearings; replace worn items while the pump is open.
Tighten to spec; after reassembly, prime with compatible fluid and check for leaks and smooth stroke.

Frequently Asked Questions

Match model, series (e.g., Ultra Max II vs. Ultra Max), and serial range in your Graco parts manual. If your sprayer has mid-series updates, internal components can differ even with the same model badge.

Not always. Check inlet/outlet valves, packings, and spray tip first. If those are healthy, inspect the 240518 piston rod for scoring, bend, or wear and evaluate the drive link/bearings.

Typically rod only. Seals/packings and seats are separate items or included in a specific repair kit for your pump family. Check your model’s bill of materials.

Yes, some Ultra Max, Ultra Max II, GMax, and LineLazer models have changes by year or series. Always check the serial number lookup section of your parts manual to avoid ordering the wrong rod.

Inspect and consider replacing packings, ball/seat valves, rod bearings/bushings, and any seals showing wear. This prevents repeat tear-downs and restores pump performance.