The GRACO 556937 is a spring designed for the plunger mechanism in high-pressure (HP) pumps. It is a critical component that ensures proper plunger return and consistent pump operation within GRACO lubrication and pumping equipment. The material is not specified in available documentation, but it is engineered for durability and reliability in demanding industrial environments.

Key Features:

• Spring, Plunger
• Compatible with GRACO HP series high-pressure pumps, such as the HP50 High Pressure Lubricator
• Engineered for reliable plunger return
• Designed for use in high-pressure pump assemblies
• Supports consistent pump operation and longevity

Applications:
Used in GRACO high-pressure lubrication systems, including industrial lubrication and maintenance applications where reliable pump operation is essential.

Installation Notes:

• Using genuine GRACO parts ensures optimal performance, safety, and longevity of the equipment. Non-genuine parts may compromise system reliability and void warranties.
• Always refer to the specific GRACO equipment manual for installation instructions
• Ensure the pump is depressurized and isolated before replacing the spring
• Inspect the plunger and surrounding components for wear or damage during installation
• Use appropriate tools and follow safety protocols