FIELD: maintenance of rail track. SUBSTANCE: machine has frame resting on rail wheel track, and movable in height compacting unit connected with frame. By means of vibrators, compacting unit is imparted with vibrations performed in horizontal plane lateral to machine axis. Machine travels along rails on flanged rollers. Distance between rollers in direction perpendicular to longitudinal axis of machine can be changed by means of extension device consisting of two double-action power cylinders with single-side rods located along one axis. Each cylinder rod is pivotally connected with adjacent axle of one of flanged rollers. EFFECT: high efficiency. 4 cl, 6 dwg
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