⬢Unscrew the Festo fittings QSM-M5 from both the printer and the MMU unit. If the fittings are tight, you can use the Unikey or an 8mm wrench.
⬢Keep the PTFE tube with the fittings aside for disassembly later.
⬢We will have to disconnect the buffer from the MMU unit.
⬢Loosen all the screws on the buffer securing the PTFE tubes connected to the MMU unit. Remove all five tubes by pulling them out.
⬢Keep the buffer for a later disassembly in the next chapter.
⬢On the back of the MMU unit, slightly loosen the four screws holding the rear-PTFE holder.
⬢Remove all five PTFE tubes and dispose of them immediately. These tubes will not be used again for MMU3.
MMU3 is designed to work with differently-sized PTFE tubes. Reusing MMU2S tubes during the assembly of MMU3 will result in incorrect operation.