Graco 17J556 Express Pump Lower Kit

Graco 17J556 Express Pump Lower Kit is a genuine OEM replacement designed for quick, easy swap-outs of your sprayer’s worn fluid section, restoring pressure and spray performance efficiently.

Fits Graco 390, 395, 490, 495, and 595 series (2003–2014 models)
Complete pre-assembled pump lower – ready to install
Minimizes downtime with quick field replacement
Includes packings, valves, and cylinder
Ideal for restoring prime and consistent spray pressure

Retail Price: $245

You save: $30.62 (12.50%)

Our Price: $214.38

Based on 0 reviews

Description

Compatibility & Overview

Compatible Machines

The Graco 17J556 Express Pump Lower Kit fits the following earlier-generation Graco electric airless sprayers (verify by model/serial):

Graco 390 — Stand (253958), Hi-Boy (262019)
Graco Ultra 395 — Stand (233960), Hi-Boy (233962)
Graco Ultra Max II 490 — Lo-Boy (249913), Hi-Boy (249914)
Graco Ultra Max II 495 — Stand (249915), Lo-Boy (249916), Hi-Boy (249917)
Graco Ultra Max II 595 — Lo-Boy (249918), Hi-Boy (249919)

Tip: Some newer variants may require a different lower (e.g., 17J552 or an Endurance pump). Match by exact model/serial before ordering.

What is the 17J556 Express Pump Lower Kit?

A genuine OEM replacement fluid section (pump lower) designed for quick change-outs to reduce downtime. It refreshes the worn lower assembly—cylinder, rod, valves, and packings—so your sprayer restores prime, pressure, and finish quality without replacing the entire machine.

Key Details

Kit Type	Express Pump lower (complete fluid section)
Purpose	Direct replacement for a worn/damaged lower; restores pumping performance and pressure control
Typical Components	Pre-assembled lower: cylinder, piston/rod, inlet & outlet check valves, packings/seals, fasteners (contents may vary by batch)
Notable Benefits	Faster field swap vs. full rebuild, minimized downtime, OEM fit for listed sprayers
Fit Guidance	For earlier 390/395/490/495/595 units. Later series may use 17J552 or Endurance pump variants—confirm by model & serial.

What’s Included & When to Choose It

Pre-built pump lower ready to install (no cylinder press-work needed)
Factory-set valves & packings for reliable sealing and suction
Installation hardware where applicable

Choose the 17J556 when your sprayer still has a healthy drive/motor but shows symptoms like poor priming, pressure fluctuation, or persistent leaks from the lower.

Installation Notes

Relieve pressure, unplug, and follow Graco safety procedures.
Remove the old lower; clean the drive yoke area and inspect the clutch/yoke pin.
Install the new 17J556 lower, align to the yoke, and torque per spec.
Prime with water/appropriate solvent, check for leaks, then test spray.

Always refer to your model’s service manual for torque values and sealant guidelines.

Frequently Asked Questions

Match the exact sprayer model and, if possible, the serial range with Graco’s parts list. If your unit is a newer generation, it may require 17J552 or an Endurance pump (e.g., 17C718) instead of 17J556.

Hard or failed priming, loss of pressure, surging, material bypass past packings, or repeated lower-end leaks after rebuilds typically point to a worn fluid section.

It’s an OEM Express Pump replacement designed for quick swaps. It is not positioned as a performance upgrade over Endurance models; choose the version specified for your sprayer for best results.

Only basic hand tools are typically required. Follow the service manual for torque specs and thread sealant use. Always perform pressure relief before any service.

Yes—17J556 is supplied as a pre-assembled lower including packings and valves so you can install, prime, and return to spraying quickly.