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
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
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