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Graco 166164 Female Gland Packing

The Graco 166164 Female Gland Packing ensures a secure seal within pump gland assemblies to prevent fluid leakage and maintain system pressure. Ideal for servicing Graco sprayers and pump units where wear or leakage occurs.

  • OEM Genuine Graco part
  • Prevents leakage around moving shafts
  • Durable and wear-resistant seal
  • Restores pump performance and pressure stability

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Graco 166164 Female Gland Packing

Compatibility & Fitment

Part Details & Function

Part Number 166164
Part Name Female Gland Packing (FEMA)
Category Seal / Packing for pump gland assemblies
Purpose Controls leakage around moving rods/shafts within Graco pump/gland assemblies to maintain pressure and performance.
OEM Genuine Graco replacement component

What It Does

This female gland packing sits within the gland assembly of select Graco pumps to provide a wear-resistant dynamic seal. Replacing worn packing restores sealing efficiency, reduces fluid loss, stabilizes pressure, and helps extend overall pump life.

When to Replace

  • Visible fluid seepage from the gland area
  • Pressure instability or frequent re-priming
  • Scheduled pump overhaul or packing service interval
  • Rod scoring or packing wear noted during inspection

Installation Notes

  • Depressurize and flush per Graco safety procedures before service.
  • Clean the gland bore; inspect the rod/piston surface for damage.
  • Install packing in the correct orientation as shown in your parts manual.
  • After assembly, pressure-test with compatible fluid and check for leaks.

Frequently Asked Questions

Match the part number in your unit’s parts manual or exploded diagram to 166164. If your manual specifies a different packing number, do not substitute without an official cross-reference.

Yes. It is a genuine Graco part designed to meet original specifications for fit, materials, and performance.

Many technicians replace adjacent wear items (other packings, seals, glands) during a service to ensure consistent sealing and minimize downtime. Check your model’s service kit and diagram.

Symptoms include leakage at the gland, pressure fluctuations, loss of prime, and premature wear of the rod due to insufficient sealing contact.

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