Industrial 509GC284A FMPS Cylinder Sleeve is a Mack component designed as a replaceable inner liner for FMPS cylinder assemblies. As a cylinder sleeve, it provides the wear surface and bore support required for reliable piston travel within FMPS-equipped Mack engines. The part number 509GC284A identifies this sleeve as the correct replacement for FMPS cylinder assemblies in compatible Mack applications.
