The system was not at first particularly successful, as the injection piles of the day were difficult to place by vibration. Initially, vibration thus remained a sideline activity. The few vibrators in operation were built by a variety of companies under license.
The launch of hydraulic driving changed fortunes at the end of the Sixties. With the improvement in electric drive technology and the introduction of a hydraulic drive on the MS-12 vibrator in 1967, business picked up noticeably. Production was brought back to the company in 1970 and the first hydraulic vibrators with an adjustable first moment of area were developed. With modifications, these are still in successful use today in the HHF series. The revival of business was also significantly boosted when the services of Krupp Stahlhandel as a marketing partner were obtained in 1972. MÜLLER driving and extracting equipment was now marketed throughout Germany.