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Graco 164623 Packing O-Ring

Graco 164623 is a durable Packing O-Ring that seals the fluid section to maintain pressure and prevent leaks. Ideal to replace during pump rebuilds or whenever you notice pressure loss.

  • Part No.: 164623
  • Type: PTFE (Teflon) packing O-ring
  • Fits: Ultra 395/495/595, Ultra Max II 695/795, 1095 & 1595 (Contractor Series)
  • Purpose: Maintains seal integrity, reduces leakage, stabilizes spray pattern
  • Replace If: Fluid leaks, pressure drop, or irregular spray pattern
  • Verify: Confirm 164623 in your model’s OEM parts list before ordering

$52.25
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Overview & Compatibility — Graco 164623 Packing O-Ring

The Graco 164623 is a Packing O-Ring made for fluid-end sealing in select Graco airless sprayers. It helps maintain pressure and prevents leaks during operation.

Compatible Machines

  • Graco Ultra 395
  • Graco Ultra 495
  • Graco Ultra 595
  • Graco Ultra Max II 695
  • Graco Ultra Max II 795
  • Graco 1095 (Contractor Series)
  • Graco 1595 (Contractor Series)

Key Details

Part Number 164623
Description Packing, O-Ring — seals the fluid section to reduce leakage and maintain spray pressure.
Typical Material PTFE (Teflon) style O-ring used in many Graco pump seal stacks.
Where Used Fluid/pump section of compatible Graco airless sprayers listed above.
When to Replace Evidence of leaks, pressure drop, poor spray pattern, or during scheduled pump maintenance.

Helpful Notes

  • Always verify the OEM breakdown for your exact model/serial range before ordering seals.
  • Replace O-rings with clean, compatible lubricant and keep the pump internals free of debris.
  • If rebuilding the pump, consider a complete packing kit in addition to single O-rings.

Frequently Asked Questions

Check your sprayer’s OEM parts manual or pump breakdown. If your machine is one of the models listed in Compatible Machines, 164623 is commonly used, but verifying by part number in the manual is best practice.

Install with a clean, light lubricant compatible with your coating. Avoid twisting or nicking the O-ring. Inspect mating surfaces for wear, and replace other worn packings while the pump is open.

Look for fluid leakage, pressure drop, pulsation, or a poor spray pattern. Continued use can accelerate wear on pistons, cylinders, and other packings, so replace promptly.

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