Graco 255531 Kit, Throat, L500Cs/L500Ss

The Graco 255531 Kit, Throat, L500CS/L500SS is a genuine replacement throat packing kit designed to restore sealing performance in compatible 500 cc Check-Mate® lower pumps. Replacing worn throat packings helps prevent material leakage, maintain consistent pump operation, and extend the service life of the pump assembly.

Compatible Machines

This throat repair kit is designed for the following Graco lower pump assemblies:

• L500CS – 500 cc Severe Duty Carbon Steel Lower Pump
• L500SS – 500 cc Severe Duty Stainless Steel Lower Pump

These lower pumps are commonly installed in:

• Check-Mate® bulk transfer pump systems
• Adhesive and sealant dispensing systems
• High-viscosity material transfer equipment
• Industrial extrusion systems
• Supply and feed pumping systems

Kit Components

Key Features

• Genuine Graco 255531 replacement throat seal kit.
• Designed specifically for L500CS and L500SS lower pumps.
• Helps reduce fluid leakage caused by worn throat packings.
• Restores proper sealing and pumping efficiency.
• Supports preventive maintenance and pump rebuilding programs.
• Manufactured to meet original equipment specifications.

Applications

The kit is suitable for maintenance and repair of industrial pumping systems handling adhesives, sealants, coatings, lubricants, and other high-viscosity materials where L500CS or L500SS lower pumps are used.

Additional Compatibility Information

Frequently Asked Questions