The GRACO 166986 is a helical compression spring designed for use in high-pressure fluid regulators. It is typically made from high-grade steel and is engineered to provide reliable force and durability within GRACO equipment, specifically for pressure regulation in fluid handling systems.

Key Features:

• Helical compression spring
• 166986 (standard spring, ref. no. 9)
• High-grade steel (assumed, not explicitly stated)
• Recommended for 2000–3000 psi (135–207 bar); can function at 1000–2000 psi (70–135 bar) but with reduced optimal performance
• Compatible with GRACO high-pressure fluid regulators, such as Model 206661 and others using standard spring 166986
• Engineered for high-pressure applications
• Reliable force and durability
• Standardized for easy replacement and maintenance

Applications:
Used in GRACO high-pressure fluid regulators to maintain and regulate fluid pressure in industrial lubrication, painting, and fluid transfer systems.

Installation Notes:

• Using genuine GRACO parts ensures optimal performance, safety, and longevity of equipment. Non-genuine parts may compromise system integrity and void warranties.
• Always use genuine GRACO springs and accessories for best results.
• Follow manufacturer’s instructions for installation and maintenance.
• Ensure the regulator is depressurized before replacing the spring.
• Regularly inspect the spring for wear or deformation.
• Inspect the spring during routine maintenance checks.
• Replace the spring if signs of fatigue or damage are present.
• Keep the regulator clean and free from debris.