Analyzer maintenance

A maintenance tool for removal of a valve sleeve assembly from a valve cavity in a flow through cell of a blood gas analysis system or the like, comprising

• stepped sleeve structure having a cylindrical lead portion adapted to provide support for toroidal seal members carried by said valve sleeve, a cylindrical support portion of cross sectional dimension greater than said cylindrical lead portion and corresponding to the inner cross sectional dimension of said valve sleeve assembly for aligning engagement with the inner surface of said valve sleeve, and a limit shoulder for engaging an end of said valve sleeve, said stepped sleeve structure including a bore that is eccentric with respect to the cylindrical surfaces of said lead and support portions,
• a shaft disposed in said bore,
• gripping structure carried by said stepped sleeve structure including a cam member at the end of said stepped sleeve structure opposite said limit shoulder portion that is movable between a retracted position and an extended position, said cam member in said extended position having a portion that extends radially beyond said cylindrical lead portion at the end of said stepped sleeve structure, and
• handle structure for rotating said shaft to move said cam member between said retracted and extended positions, said stepped sleeve structure being adapted to be inserted into a valve sleeve assembly in a valve cavity with said cam member in said retracted position so that said cylindrical support portion is piloted on the inner surface of said valve sleeve assembly and then said handle structure is operated to place said cam member in said extended position so that subsequent withdrawal of said stepped sleeve structure supports and removes said valve sleeve from said valve cavity while concurrently providing support for said toroidal seal members.