Abstract: A mechanism is disclosed for use in permitting inspection and/or replacement of a seal chamber bushing of a centrifugal or axial flow pump at a point of pump installation and without necessitating disassembly of the pump rotating assembly. The mechanism includes a bushing holder, which is removably fitted within a pump shaft access or receiving opening extending through a pump backplate or stuffing box cover; and a gland or seal chamber housing, which is removably mounted on the backplate and releasably coupled to the bushing holder in a manner facilitating removal of the latter from within the pump shaft access opening.