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Graco 510475 Packing Cup

The Graco 510475 Packing Cup is a genuine replacement part used in select Graco pump assemblies to maintain a proper seal and consistent fluid pressure.

  • Designed to seal the pump piston and prevent fluid leakage
  • Helps maintain stable pressure and efficient pump performance
  • Commonly replaced during routine pump maintenance or rebuilds
  • Compatible with specific Graco air-powered and airless spray pumps

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Compatible Machines

The Graco 510475 Packing Cup is designed for use in specific Graco pump assemblies found in professional and industrial spray systems.

  • Graco air-powered piston pumps (select models)
  • Graco heavy-duty airless spray rigs
  • Graco displacement pump assemblies used in industrial coating systems
  • Graco contractor-grade spray equipment with compatible pump designs

What Is the Graco 510475 Packing Cup?

The Graco 510475 Packing Cup is a genuine Graco replacement component used within the fluid pump assembly. It plays a critical role in sealing around the piston or rod, helping maintain proper pressure while preventing fluid leakage during operation.

This packing cup is considered a normal wear item and is commonly replaced during routine maintenance or pump rebuilds to restore performance and extend equipment life.

Key Features

Part Number 510475
Product Type Packing Cup
Function Seals fluid pump piston to prevent leaks
Application Air-powered and airless spray pump assemblies
Manufacturer Graco

Maintenance & Replacement

Replacing worn packing cups helps maintain consistent pressure, reduces material waste, and protects other pump components from premature wear. Always confirm compatibility with your specific Graco pump model before installation.

Frequently Asked Questions

A packing cup creates a tight seal around the pump piston or rod, allowing the pump to build pressure while preventing fluid from leaking internally or externally.

Yes, packing cups are wear components and should be inspected regularly. Replacement is recommended during pump servicing or when leaks and pressure loss occur.

No, the Graco 510475 Packing Cup fits only specific pump assemblies. Always verify your machine’s parts manual or model compatibility before ordering.

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