Replacing the PTFE nozzle and tubing on extruders purchased before 2016 is a useful procedure to vary the diameter of the material exit hole to allow for faster prints with higher layer thicknesses. Here are the detailed steps to do this:

STEP 1: SET THE NOZZLE TEMPERATURE

• Turn on the printer and set the nozzle temperature to 200°C.  To do this, go to the printer’s menu and select: Menu > Control > Nozzle > Temperature > 200°C.

STEP 2: REMOVE THE EXISTING NOZZLE

• Use a 5mm wrench to unscrew the nozzle from the extruder. Be sure to protect your hands with a cloth or gloves to avoid burns.

STEP 3: REMOVE THE PTFE TUBING

• Screw a grub screw into the top of the steel barrel to push the PTFE tube up.
• Using pliers, remove the PTFE tube from the bottom of the extruder.

STEP 4: INSERT THE NEW PTFE HOSE AND NOZZLE

• Turn off the printer.
• Insert the conical part of the nozzle into the new PTFE tube.
• Remove the grub screw from the top of the steel barrel and screw the nozzle until it matches the extruder stop.
• Screw the grub screw back into the top of the steel barrel until it matches the stop to lock the PTFE tube.

STEP 5: HEAT THE NOZZLE AGAIN

• Turn on the printer and heat the nozzle to make the nozzle tighten again.

STEP 6: LEVELING THE BUILD BED

• After warming up the nozzle, proceed to level the print bed as you normally would.

NOTE: If you have nozzles without a tapered end, you may not need to replace the PTFE tubing, unless technical support has specifically recommended it.