The GRACO 556943 is a spring and plunger assembly designed for use in the Model 100 Pump. Its primary function is to facilitate the reciprocating action within the pump, ensuring reliable operation for lubrication or fluid transfer applications. The material is not explicitly specified, but typical GRACO pump springs are made from high-grade steel for durability and consistent performance.

Key Features:

• Spring, Plunger
• Model 100 Pump
• GRACO Model 100 Pump
• Facilitates reciprocating action for reliable pump operation
• Designed for durability and consistent performance
• Ease of maintenance (as part of standard pump service)

Applications:
Used in lubrication systems and fluid transfer applications, particularly where positive displacement and reliable operation are required. Commonly found in industrial, mining, and agricultural equipment maintenance.

Installation Notes:

• Using genuine GRACO parts ensures optimal performance, longevity, and safety of the pump system.
• Always refer to the GRACO Model 100 Pump manual for specific installation instructions
• Ensure the pump is depressurized and isolated before replacing the spring and plunger
• Inspect the pump chamber for wear or debris before installing the new part
• Follow all safety guidelines and use appropriate tools for installation