The GRACO 258941 Kit, U-Cup Repair 25 is a replacement seal kit designed for use in GRACO Z-Series chemical pumps. It contains U-cup seals and related components, typically made from durable elastomers or engineered plastics, to restore sealing integrity and prevent leaks in high-wear areas of the pump assembly.

Key Features:

• Seal repair kit
• 25cc (for 25cc pump models)
• Elastomer/engineered plastic U-cup seals and related components
• GRACO Z-Series chemical pumps, specifically for 25cc pump models
• Designed for high-wear areas
• Restores sealing integrity
• Helps prevent leaks
• Supports reliable pump operation

Applications:
Used for maintenance and repair of GRACO Z-Series chemical pumps, particularly in applications requiring frequent seal replacement due to wear or chemical exposure.

Installation Notes:

• Using genuine GRACO parts ensures proper fit, performance, and longevity of the pump assembly.
• Replace worn or damaged parts with components from the repair kit
• Lubricate seals, o-rings, and moving parts with grease before installation
• Apply anti-seize lubricant to threads where specified
• Ensure U-cup springs face the correct direction (toward displacement rod or throat cartridge as per manual)
• Follow torque specifications for assembly (refer to manual for exact values)
• Assemble and torque after displacement rod is assembled through throat retainer
• Consult the equipment manual for detailed assembly instructions
• Use proper tools for installation
• Inspect all components for wear or damage before installation
• Follow a star pattern when tightening tie bolts to ensure even pressure