CUP KIT (Mitsubishi MB0973984)

A worn cup kit can allow fluid bypass, reducing system pressure and causing sluggish operation. The aftermarket replacement part references Mitsubishi as the OE maker and cross-references part number MB0973984. This cup kit functions as a sealing assembly within a fluid-handling component. Its primary mechanical role is to contain pressurized fluid and prevent leakage between moving surfaces. A common failure consequence is gradual loss of force transmission, leading to incomplete actuation. During routine service, a cup kit may show cracking or hardening from thermal cycling. Verify the serial number or application, then call (562) 693-7748.

Part number variants: MB0973984, mb0973984