The GRACO 556429 is a 90-degree Zerk fitting with 1/8 NPTF threads, typically constructed from durable metal for reliable grease or lubricant delivery. It is designed for use in automatic lubrication systems, specifically as a leak-proof grease nipple for modular divider valves and end blocks in GRACO equipment.

Key Features:

• Zerk fitting (grease nipple)
• 1/8 NPTF, 90°
• Compatible with GRACO Trabon® MSP and Manzel® MHH modular divider valves and end blocks; also referenced for use with GL-1 series grease injectors
• Leak-proof design for reliable lubrication
• 90-degree angle for flexible installation in tight spaces
• Durable construction for long service life
• Easy to install and maintain

Applications:
Used in automatic lubrication systems for on-road vehicles, off-road equipment, and compressor equipment. Specifically designed for use with GRACO Trabon® MSP and Manzel® MHH modular divider valves and end blocks.

Installation Notes:

• Using genuine GRACO parts ensures proper fit, leak-proof operation, and compatibility with GRACO lubrication systems, reducing downtime and maintenance costs.
• Ensure threads are clean and free of debris before installation
• Apply appropriate thread sealant if recommended by the equipment manual
• Tighten securely but avoid over-torquing to prevent damage
• Inspect regularly for leaks or wear and replace as needed
• Regularly check for leaks or blockages
• Replace fittings if signs of wear or damage are present
• Use only compatible lubricants as specified by GRACO