The GRACO 191779 is a bearing made from acetal, designed for use in GRACO air-operated diaphragm pumps. It serves as a critical component within the air valve assembly, ensuring smooth operation and reducing friction between moving parts.

Key Features:

• Bearing
• 191779
• Acetal
• GRACO air-operated diaphragm pumps (e.g., Husky 715 series)
• Press-fit installation for secure placement
• Designed for durability and smooth operation
• Low friction material for reduced wear
• Included in GRACO Air Valve Kit 239–952

Applications:
Used in GRACO air-operated diaphragm pumps, particularly within the air valve assembly to support and guide moving components.

Installation Notes:

• Using genuine GRACO parts ensures optimal performance, longevity, and compatibility with GRACO equipment.
• Grease o-rings and install them in the bearings before pressing the bearings into place.
• Press-fit the bearings so they are flush with the surface of the housing.
• Apply grease to bearings and pilot pins as specified in the manual.
• Torque screws to 5–7 in-lb (0.6–0.8 N.m) when securing valve plate.
• Regularly inspect bearings for wear and replace as needed.
• Use only recommended lubricants and genuine replacement parts.
• Follow GRACO’s maintenance schedule for air-operated diaphragm pumps.