Good evening ReneUrbaez. The hex nut locks counterclockwise. [/B] If that model has a single plastic gear on top of the pulley of the transmission case, it is impossible for the spinning drum to move in that direction of rotation unless the unidirectional bearing is damaged and allows its rotation in a forced manner. In addition, the brake band should immobilize the spinning drum unless someone got to modify the steely motor drain wire, shortening its distance. Comment on this. Thanks and regards. [b] ------------------------ Edited on 08-08-2017 for the first time. Approach I: ** .- 3 hours ago From: ReneUrbaez Good morning Victor, Thank you for your attention, the washer is double gear and the transmission is damaged and if I am loosening the nut counterclockwise - [b] Observations: Greetings ReneUrbaez. Disengage the steely motor drain wire from the end of the clutch arm so that the brake band immobilizes the spinning drum. Before unhooking try to take a picture so that you know how to replace it when the new transmission box is installed. Do not forget the very special washer located between the base of the centrifugal drum (the plateau or star) and the top of the transmission box. One of its faces has a rubber attached to it. That special washer should not be missing. Thanks and regards. ----------------------- Edited on 08-28-2017 for the second time. Approach II: **.-20 minutes ago From: ReneUrbaez Now disconnect the cable from the motor drain, but continue to turn the drum, it will be that the transmission is completely broken inside and that is why the drum moves by turning the nut ???? Created in 4 hours -. ** Observations: Regards Rene: One possibility is that the brake band fails to slow down the transmission case housing. Have you loosened and removed the bolt that holds the brake band by the end where the window is open in that box? http://i.imgur.com/xTMk5VK.png The screw to which I make reference you will locate where the red line is shown with the legend of "Banda del Freno". What you can do is have someone hold the centrifuge drum firmly while you try to loosen the hex nut. Comment on this. Thanks and regards.