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Graco 25D186 Piston Repair Kit PTFE/PE (090)

Graco 25D186 Piston Repair Kit is an OEM PTFE/PE packing set for rebuilding 090-size piston assemblies in compatible Graco pump lowers.

  • Part No: 25D186
  • PTFE & UHMWPE piston packings
  • For 90cc / 090 lower pumps
  • Restores sealing & spray pressure

$204.5
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Graco 25D186 PTFE/PE Piston Repair Kit Details

Compatible Machines

This kit is used in Graco pump lowers that use the 90 size piston packing configuration.

  • Graco Xtreme™ Lower Pumps – 90cc class
  • Graco XP Proportioner Systems with 90cc fluid sections
  • Industrial Graco airless sprayer packages using compatible 90cc lowers

Key Product Information

Part Number 25D186
Kit Type Piston repair kit
Packing Material PTFE / PE (UHMWPE)
Size Class 090 piston configuration
Application Piston seal replacement during lower pump rebuild
OEM Status Genuine Graco replacement part

Product Description

The Graco 25D186 Kit, Repair, Piston, PTFE/PE (090) is an OEM seal kit designed to service and rebuild the piston assembly in compatible Graco 90-size lower pumps. The PTFE and UHMWPE packing combination provides strong chemical resistance, low friction, and long wear life in demanding spray and fluid handling applications.

Using the correct piston packing kit helps restore sealing efficiency, maintain spray pressure, and reduce leakage during operation. Always match the kit to your exact lower pump model and displacement before installation.

Service & Maintenance Notes

  • Install during scheduled lower pump rebuilds
  • Inspect piston rod and cylinder for wear before fitting new packings
  • Lubricate packings as specified in your pump service manual
  • Use only matching size kits for correct sealing performance

Frequently Asked Questions

It replaces the piston packings inside compatible 090-size Graco lower pumps to restore proper sealing and pressure performance.

Check your lower pump displacement and parts breakdown. If your unit specifies a 090 piston packing kit, this part number is the correct match.

Yes. PTFE and UHMWPE packings are commonly used for their chemical resistance and durability in demanding industrial coating and fluid transfer applications.

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