reference numeral 50 on the lower end thereof when downward movement of the pipe 22 and point 50 encounters a resistance to penetration of a subsurface formation which cannot be overcome by the weight of the device vibratory movement and forces will be automatically imparted to the pipe 22 and point 50 mounted thereon to introduce an additional downward vibratory force without requiring a heavy counteracting weight to move the mounting pipe and point downwardly in the subsurface formation to a desired depth the lower end of the tower 12 includes a vertically disposed supporting frame 52 which includes a bracket structure 54 supporting the lower end of the guide tube 20 with the bracket structure 54 being adjustable to compensate for wear between the guide tube 20 and the pipe 22 positioned between a bottom frame member 56 and a top frame member 58 of the frame 52 is a pair of rubber latticework supports 60 which supports a housing structure 62 supporting the pinion gear 46 and hydraulic motor assembly 44 and the vibratory exciter 48 as illustrated in fig2 and 3 the vibratory exciter 48 includes a housing 64 with a pair of rotating eccentrically weighted members 66 therein which may be similar to the structure disclosed in u s pat no 4 819 740 issued apr 11 1989 or u s pat no 4 553 443 issued nov 19 1985 the housing 64 of the vibratory exciter is rigidly affixed to the housing 62 for rack gear 46 such as by welding or the like and both of.