The GRACO 556640 is a brass male tube elbow fitting designed to connect 5/16 inch (7.94 mm) tubing to a 1/4 inch (6.35 mm) NPTF threaded port. It is intended for use with oil and grease in pneumatic grease jockey systems, primarily for on-road vehicle applications.

Key Features:

• Elbow
• 5/16 in. (7.94 mm) tube x 1/4 in. (6.35 mm) NPTF
• Brass
• Oil, grease; on-road vehicles
• Durable brass construction for longevity and corrosion resistance
• Male threaded (NPTF) connection for secure attachment
• Elbow design for flexible routing in tight spaces
• Reliable performance in pneumatic grease systems

Applications:
Used in pneumatic grease jockey systems for on-road vehicle lubrication and maintenance.

Installation Notes:

• Using genuine GRACO parts ensures compatibility, reliability, and optimal performance within GRACO systems.
• Ensure tubing is cut cleanly and deburred before insertion
• Hand-tighten the fitting, then use a wrench to secure, but avoid over-tightening to prevent damage
• Check for leaks after installation and during routine maintenance
• Use appropriate thread sealant for NPTF connections if required
• Regularly inspect fittings for signs of wear or leakage
• Replace fittings if damaged or if leaks are detected
• Keep fittings clean and free from debris