The GRACO 104938 Packing O-Ring is a sealing component made from elastomeric material, designed to fit at the bottom of the spray gun handle just above the trigger guard retainer. Its primary function is to seal the gun swivel to the gun handle, preventing leaks and ensuring reliable operation of GRACO spray equipment.

Key Features:

• O-Ring
• Compatible with various GRACO spray gun models (e.g., 390 ST, 455 ST, 490 ST)
• Reliable sealing performance
• Easy to replace
• Essential for leak prevention

Applications:
Used in GRACO spray guns to maintain a secure seal between the gun swivel and handle, ensuring leak-free operation during painting or coating applications.

Installation Notes:

• Using a genuine GRACO O-Ring ensures proper fit, sealing, and longevity of the spray gun.
• Ensure the spray gun is depressurized before disassembly.
• Clean the seating area before installing the new O-Ring.
• Inspect the O-Ring for damage or wear during routine maintenance.
• Replace the O-Ring if leaks are detected or as part of regular maintenance.