⬢Turn the printer so that the LCD is facing towards you.
⬢Move the Y-carriage all the way from you and cut two zip ties on the Y-rod-holders with the needle-nose pliers.
⬢Release four screws holding the Y-rod-holders. Do not throw away the screws, you will need them in the following step.
⬢Lift the smooth rod up, 1-2 cm (0.39 - 0.79 inch). If you feel resistance, stop lifting! Otherwise, you can damage the Y-rod-holder on the other end of the rod.
⬢Remove one Y-rod-holder from the printer.
⬢Push the new Y-rod-holder on the rod. Align the front surface of the plastic part with the flat surface of the rod.
⬢Check the correct position of the Y-rod-holder. The screw hole must be facing up and on the "inner" side of the Y-carriage (see the picture).
⬢Repeat these steps for the second Y-rod-holder.