Graco 235709 Replacement Piston Rod

The Graco 235709 Replacement Piston Rod is an OEM-quality part designed to restore pressure and performance in Graco airless sprayers. Ideal for replacing a worn or damaged rod to ensure smooth pump operation.

OEM Part Number: 235709 (also known as 235-709)
Used In: 395 ST, 490 ST, 495 ST, Ultra 600 Series
Material: Hardened chrome-plated steel for long wear life
Replaces: Legacy rod 187613 in select pump assemblies

Retail Price: $188

You save: $43.62 (23.20%)

Our Price: $144.38

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Description

Compatibility & Quick Specs for Graco 235709 Replacement Piston Rod

Compatible Machines

Models commonly reported to use this rod (always confirm with your exact sprayer’s parts manual/serial range):

Graco 395 ST
Graco 490 ST
Graco 495 ST
Graco 450 ST / 455 ST
Graco 590 ST / 595 ST
Graco Ultra 600 Series (select variants)
Additional legacy/contractor models noted in some listings: Nova / Ultimate / Ultra variants, LineLazer 3000, 290 Easy (verify by serial)

What is the Graco 235709 Replacement Piston Rod?

The Graco 235709 Piston Rod is a core pump component that drives coating flow in compatible Graco airless sprayers. On the up-stroke it draws material into the pump, and on the down-stroke it pressurizes fluid toward the hose and gun. Replacing a worn or scored rod restores sealing performance, pressure stability, and finish quality.

Key Details

OEM Part	235709 (may appear as 235-709)
Component Type	Pump Piston Rod
Typical Material/Finish	Hardened/chrome-finished rod for wear resistance (spec may vary by supplier batch)
Related Pump Assembly	Often referenced with fluid pump 235699 on compatible machines
Also Referenced As	Interchange noted with legacy number 187613 / 187-613 in some catalogs

When to Replace & Practical Tips

Replace the rod if you see scoring, pitting, bending, or if packings fail prematurely due to a worn rod surface.
Pair rod replacement with new packings, seals, and bushings for a full refresh of the pump sealing stack.
Clean the pump housing thoroughly; install with proper lubrication and torque per the service manual.
Always confirm serial range and model generation (early vs. later ST/Ultra variants) before ordering.

Frequently Asked Questions

Not necessarily. Many 395 ST, 490 ST, 495 ST units use this rod, but regional variants and serial ranges can differ. Check your exact parts manual or contact us with your model and serial to confirm.

Persistent packing leaks, pressure fluctuations, rough pump movement, or visible scoring/pitting on the rod surface are common signs. If new packings fail quickly, the rod is often the root cause.

Yes. Replacing packings/seals along with the 235709 rod helps the new rod bed in properly and maximizes service life and pressure stability.

Many catalogs list 187613 (187-613) as an equivalent legacy reference for the same piston rod. Always verify against your model’s bill of materials to be certain.

Many sources reference pump assembly 235699 in connection with the 235709 rod on compatible machines.