Graco 17A578 Repair Packing Kit (Ceramic Ball)
$134.75
$196.00
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- Graco 17A578 Repair Packing Kit (Ceramic Ball) — OEM seal kit with leather/PE packings and a ceramic check ball.
- Fits: GMax II 7900 (Standard/ProContractor/IronMan) and TexSpray Mark X; pumps 16X425, 16X427, 17H831, 17H837.
- Purpose: Restores prime/pressure, stops bypass leaks, improves spray consistency.
- Includes: Upper & lower packings, seals, O-rings, and a ceramic ball.
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Graco 17A578 Repair Packing Kit (Ceramic Ball)
Compatible Machines
- Graco GMax II 7900 (Standard / ProContractor / IronMan; Lo-Boy & Hi-Boy frames)
- Graco TexSpray Mark X (Standard)
- Compatible Graco pump assemblies: 16X425, 16X427, 17H831, 17H837
Product Overview
Graco 17A578 Repair Packing Kit is a complete pump seal kit for select high-output airless sprayers. It includes upper/lower packings, seals, and a ceramic ball check element engineered for superior wear resistance in demanding coatings. Replacing worn packings restores prime, pressure, and spray quality.
Key Specifications
| Part Number | 17A578 |
|---|---|
| Kit Type | Pump Repair / Packing Kit (upper & lower) |
| Check Ball Material | Ceramic (high wear resistance) |
| Packing Materials | Leather & Polyethylene blend |
| Compatible Pumps | GMax II 7900 & TexSpray Mark X fluid sections; pumps 16X425, 16X427, 17H831, 17H837 |
| Typical Use | Restore sealing, prime retention, and spraying performance; reduce bypass/leaks |
| Includes | Upper & lower packings, ceramic ball, seals, O-rings, and related small parts |
Why Choose This Kit
- Durability: Ceramic ball resists abrasion in heavy-bodied or filled coatings.
- Seal Integrity: Leather/PE packings balance solvent tolerance, lubrication, and longevity.
- OEM Fit: Sized for the listed Graco pumps & sprayer models.
- Performance: Restores prime, pressure stability, and uniform spray pattern.
Installation Tips
- Depressurize and flush sprayer per Graco safety procedure.
- Remove fluid section and disassemble per model service manual.
- Inspect rod & cylinder; replace if pitted or scored to prevent premature seal wear.
- Lightly oil leather packings during assembly; observe correct orientation of each packing.
- Torque components to spec; test for leaks and proper prime/pressure.
Tip: A worn piston rod can shorten packing life. Replace rod if surface damage is visible.
Frequently Asked Questions
Upper & lower packings, seals, O-rings, and a ceramic ball check element—everything needed to reseal the listed pump assemblies.
Verify your model is a GMax II 7900 (any trim) or TexSpray Mark X, or your pump is one of: 16X425, 16X427, 17H831, 17H837. If unsure, check the pump tag or manual.
Ceramic offers excellent hardness and wear resistance, improving check-valve life when spraying abrasive or high-solids materials.
Replace when you notice pressure fluctuation, loss of prime, fluid bypass, or leakage at the packings. Heavy use or abrasive coatings will shorten service intervals.
Notes & Cross-Reference
- Use only genuine Graco parts for best fit and service life.
- Confirm pump assembly number if your sprayer was retrofitted or rebuilt.
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