The GRACO 178964 is a V-piston packing, typically made from leather or similar durable material, designed to provide a reliable seal within the piston assembly of GRACO displacement pumps. Its primary function is to prevent fluid leakage and maintain pressure integrity in high-pressure spray equipment.

Key Features:

• V-piston packing
• 178964 (also referenced as 178-964, 820-390)
• Leather or similar durable material (exact material not always specified, but commonly leather in GRACO V-packings)
• Compatible with GRACO displacement pumps requiring V-piston packings; aftermarket equivalents include Bedford 49-1297
• Provides a reliable seal for piston assemblies
• Designed for durability and repeated use in high-pressure environments
• Ease of maintenance and replacement

Applications:
Used in GRACO displacement pumps for sealing piston assemblies in high-pressure spray equipment, commonly found in industrial, agricultural, and maintenance applications.

Installation Notes:

• Using genuine GRACO parts ensures optimal performance, longevity, and safety of the equipment.
• Ensure proper alignment of the piston to the packing retainer nut during installation
• Tighten the packing retaining nut against the piston valve as specified in the pump manual
• Regularly inspect and replace worn packings to maintain equipment efficiency