Multiquip EM98127 Yellow Piston Cup Kit - OEM Replacement Part

This yellow piston cup kit maintains hydraulic sealing in the material cylinders of Multiquip concrete pumps, preventing concrete slurry bypass and maintaining consistent pump output. The piston cups create the critical seal that forces concrete through the manifold and discharge line during the pumping cycle.

Worn or damaged piston cups are a common cause of diminished pump output and the "volcano effect" in the hopper, where material accumulates in the manifold rather than discharging properly. According to Multiquip service procedures, material cylinder piston cups should be inspected regularly and replaced when squealing occurs during operation, which indicates wear beyond serviceable limits. The troubleshooting manual specifically identifies damaged or worn material cylinders and piston cups as primary causes of reduced pumping performance.

This kit is designed for the pumping piston assemblies that work in conjunction with the cam roller, crankshaft, and T-manifold system. Proper lubrication with 30-weight motor oil is essential for piston cup longevity and quiet operation.

Compatible models:

• C30HDGA

Genuine Multiquip OEM part, sold by an authorized dealer.