Abstract: An apparatus and method are provided for remotely inserting and feeding a sleeve within a selected tube to be serviced mounted in a tubesheet of a nuclear steam generator, so as to relieve reverse forces generated during the insertion and feeding of the sleeve and to reduce operator interaction. The device includes a tool having a frame, at least one gripper unit having gripping fingers which extend from a top plate of the tool for detachably suspending the frame from a tube in close proximity to the selected tube. The gripper unit also includes a hydraulically actuated cylinder for retracting the gripping fingers toward the top plate of the tool to forcibly position the tool against the underside of the tubesheet. An advancing assembly supported by the frame is also provided for remotely inserting and feeding the sleeve into the selected tube. This advancing assembly is vibrated by way of a vibrator mounted thereon.