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
