Graco 16X420 Endurance Pump

Below are the key highlights and essential information professionals should know before purchasing or replacing this Graco pump model:

Genuine OEM Replacement: Manufactured by Graco to deliver factory-grade reliability, smooth operation, and long-term performance in demanding spraying environments.
Durable Build: Features a hardened cylinder and Chromex®-treated piston rod for superior wear resistance, ensuring reduced downtime and extended lifespan.
Wide Compatibility: Fits Ultra Max II 1095/1595, GMax II 5900, and Ultimate MX II 1095/1595 models across ProContractor and IronMan series.
Professional-Grade Performance: Maintains consistent paint flow, pressure stability, and finish quality even during high-volume, daily use.
Service-Friendly Design: Equipped with replaceable packings and valves for quick maintenance and long-term savings.

Ideal for contractors seeking dependable pump performance that keeps projects running on schedule and finishes flawless.

Retail Price: $1775

You save: $284 (16.00%)

Our Price: $1491

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Description

Overview & Compatibility for the Graco 16X420 Endurance Pump

Compatible Machines

This 16X420 Endurance Pump (fluid section / displacement pump) fits the following professional Graco airless sprayers (model families):

Ultra Max II 1095 – ProContractor
Ultra Max II 1095 – IronMan
Ultra Max II 1595 – ProContractor
Ultra Max II 1595 – IronMan
Ultimate MX II 1095 – ProContractor
Ultimate MX II 1095 – IronMan
Ultimate MX II 1595 – ProContractor
Ultimate MX II 1595 – IronMan
GMAX II 5900 – ProContractor
GMAX II 5900 – IronMan
Hi-Boy / Lo-Boy configurations where specified by Graco

Tip: Always match the exact sprayer series/version (e.g., IronMan vs. ProContractor) and refer to your unit’s parts manual before ordering.

What Is the Graco 16X420 Endurance Pump?

The Graco 16X420 Endurance Pump is a heavy-duty fluid section designed for high-output airless paint sprayers. It’s engineered for durability and consistent priming, helping maintain pressure and flow with reduced downtime. If your sprayer is losing pressure, surging, or showing excessive wear in the lower, replacing the fluid section with the 16X420 restores performance to factory standards.

Key Benefits

Built for long life in demanding, daily-use spraying.
Factory-matched fit for the Ultra/Ultimate MX II 1095/1595 and GMAX II 5900 families (select versions).
Smoother priming and pressure stability for consistent finish quality.
OEM component for straightforward install and proven performance.

Technical Details

Part Number	16X420 (Endurance Pump / Fluid Section)
Component Type	Displacement pump (lower) for Graco airless sprayers
Compatible Families	Ultra Max II 1095/1595, Ultimate MX II 1095/1595, GMAX II 5900 (IronMan & ProContractor where specified)
Installation	Direct replacement; follow sprayer service manual for torque and sealing procedures
Notes	Verify your sprayer’s exact model/series and serial range for correct fit before purchase

Maintenance Tips

Flush with recommended solvent after each use to extend pump life.
Inspect packings and check balls during routine service intervals.
Replace worn or leaking lowers promptly to protect the drive system.

Frequently Asked Questions

It fits many Ultra Max II / Ultimate MX II 1095 & 1595 and GMAX II 5900 models (IronMan & ProContractor variants). Confirm your exact series/version and serial range in the parts manual to be sure before ordering.

Difficulty priming, pressure drop/surging, persistent leaks, or poor spray pattern often point to a worn lower. Replacing with the 16X420 restores pressure and consistency.

Use standard mechanic’s tools and follow Graco’s torque/sealing guidance in your service manual. Always depressurize, lock out power, and wear appropriate PPE during service.

Yes. This is a genuine Graco OEM Endurance pump (fluid section) for the listed model families.

If you’re unsure, share your sprayer’s exact model and serial details—we’ll double-check 16X420 compatibility for you.