Graco 243174 Piston Rod Kit

The Graco 243174 Piston Rod Kit is a genuine OEM replacement that restores smooth pump performance and pressure stability. Ideal for maintaining your Graco ST Pro and Performance Pro sprayers.

Fits ST 295, ST Pro 395, 455, 495
Also works with Performance Pro (Duron) and FieldLazer S100 models
Ensures consistent spray pressure and extended pump life

Retail Price: $88

You save: $18.83 (21.40%)

Our Price: $69.17

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Description

Compatibility & Overview for Graco 243174 Piston Rod Kit

Compatible Machines

This 243174 Piston Rod Kit is used on select legacy and ST-series Graco pumps. Always verify your parts list before ordering.

ST / ST Pro Series: ST 295, ST Pro 395, ST Pro 455, ST Pro 495
Performance Pro (Duron): Performance Pro 395, Performance Pro 495, DTX (Duron), Duron DTX
Field Marking: FieldLazer, FieldLazer S100
Nova / Super Nova: Nova Pro, Super Nova Pro
STX / SPX: STX, SPX
Zip-Spray / 1900 Family: 1900, 1900 Zip-Spray Plus, L 1900, Zip-Spray 1900 Plus
Other Listed Uses: TurfLiner, select ASM/Graco 1900 variants

Tip: Match by part number (243174 / 243-174) in your unit’s OEM parts manual to confirm fit for your exact model and serial range.

What the Graco 243174 Piston Rod Kit Does

The piston rod translates drive motion into the pump’s reciprocating action. Replacing a worn rod restores smooth operation, pressure stability, and helps extend packing and cylinder life.

At-a-Glance Specs

Part Number	243174 (also shown as 243-174)
Part Type	Piston Rod (pump drive component)
Common Series	ST / ST Pro, Performance Pro (Duron), STX / SPX, Nova / Super Nova, FieldLazer S100, 1900 / Zip-Spray variants
Package	Kit form (contents per OEM listing for the above models)
When to Replace	Visible scoring, bent rod, chronic pressure fluctuation, premature packing wear, or poor prime

Why Choose the

Restores pump efficiency and pressure consistency
Helps protect new packings and cylinder from accelerated wear
Direct fit for listed ST Pro / Performance Pro (Duron) families and others above

Installation Tips

Verify part number 243174 for your exact unit and serial range.
Inspect mating parts (piston, cylinder, packings) and replace if worn.
Clean components; lightly lubricate per OEM guidance during assembly.
Tighten to specified torques and confirm straight, smooth travel.
Pressure-test after reassembly; check for leaks and proper prime.

Frequently Asked Questions

Check your sprayer’s OEM parts manual for 243174 (or 243-174) against your exact model and serial range. If your pump breakdown lists this number, it’s the correct piston rod kit.

Scoring or discoloration on the rod, a bent rod, rapid packing wear, difficulty maintaining pressure, or poor priming after packing changes commonly indicate the rod is worn and should be replaced.

This is a piston rod kit; packing sets are typically sold separately. If your packings show wear, add the correct packing kit for your model during the same service.

Aftermarket options exist, but ensure equivalent material, finish, and dimensions. For critical uptime and longevity, many techs prefer genuine Graco components.

Inspect the piston/cylinder, packings, ball/seat, and check valves. Replace worn parts together to avoid repeat teardowns and ensure optimal pump performance.