Hi Leonildo To change the belt, you must loosen a nut that is at the top where the engine goes, with a 9/16 wrench, this nut is the one that adjusts or gives tension to the engine belt. Then you slightly loosen the three screws that support the transmission, and there is a screw of the three, the one that is below the solenoids, (for giving you a nearby location) this screw has a bushing between the transmission and the base of the tank of the washing machine, you must remove it because that space is that you must pass the belt so that it is well placed. In the structure of the cluch, there is an axle with a tension spring, it has a secure pin, fix it as it is placed before removing it, inside that structure the belt must pass so that it is in the correct position on the transmission pulley , you must also pass the belt over the pump pulley and logically over the motor pulley. I hope I have made myself understood, any concerns please let me know. regards