The GRACO 557359 is an upper seal designed for the Trabon® MJ Divider Valve cross port kit. It is a replacement part intended to maintain the integrity and performance of the divider valve assembly within GRACO lubrication systems. The material is not specified in available documentation, but typical divider valve seals are made from durable elastomers or synthetic rubber for reliable sealing under pressure.

Key Features:

• Upper Seal for Cross Port Kit
• Compatible with Trabon® MJ Divider Valve cross port kits
• Designed for reliable sealing in high-pressure lubrication systems
• Replacement part for maintenance and repair
• Supports system integrity and leak prevention

Applications:
Used in lubrication systems requiring precise metering and distribution of oil or grease, such as industrial machinery, mining equipment, and agricultural machinery.

Installation Notes:

• Using genuine GRACO parts ensures optimal performance, compatibility, and longevity of the lubrication system.
• Ensure the system is depressurized before installation
• Clean the sealing surfaces thoroughly before fitting the new seal
• Follow the manufacturer’s recommended torque settings for assembly
• Inspect for leaks after installation and during routine maintenance
• Regularly inspect seals for wear or damage
• Replace seals as part of preventive maintenance to avoid system failure
• Use only compatible lubricants as specified by GRACO