Graco 255532 Kit, Throat, L500Cm/L500Sm

The Graco 255532 Kit, Throat, L500CM/L500SM is a genuine repair kit designed to service the throat section of compatible Graco Check-Mate® lower pumps. It includes the essential packings, seals, wipers, spacers, and O-rings required to restore sealing performance, reduce material leakage, and help extend pump service life.

Compatible Machines

This throat repair kit is compatible with the following Graco lower pump models:

• L500CM – 500cc Carbon Steel MaxLife Lower Pump
• L500SM – 500cc Stainless Steel MaxLife Lower Pump

Any Graco system equipped with an L500CM or L500SM lower pump can utilize this kit, including industrial coating, adhesive, sealant, extrusion, and material transfer systems that use these lower assemblies.

Kit Features

Typical Components Included

The kit contains the wear components commonly required during throat section maintenance, including:

• O-rings
• U-cup packing
• Wet cup cover seal
• Wet cup cover wiper
• U-cup spacers
• Bearing spacer

Replacing worn throat seals and packings helps maintain proper pump pressure, reduces leakage, and supports reliable operation in demanding industrial applications.

Benefits of Replacing the Throat Kit

• Helps prevent material leakage around the displacement rod.
• Maintains proper sealing performance.
• Reduces downtime caused by worn packings and seals.
• Supports longer pump service life.
• Helps maintain consistent pumping efficiency.

Frequently Asked Questions