Replace the Bowden tubes

The Bowden tubes guide the filament from the feeders to the print head.

Forwarding improperly cut or ground down filament through the Bowden tube could scratch or damage the inside of the tube. If this happens, the filament can no longer be forwarded to the print head smoothly. This can lead to under extrusion or other print quality issues.

After removing a Bowden tube multiple times, the tube coupling collet can wear out. If this happens, the tube coupling collet will no longer have a firm hold on the Bowden tube. In this case, the Bowden tube will move up and down during prints which can negatively impact print quality.

If the Bowden tubes are permanently damaged, they need to be replaced. To maintain optimal print quality it is recommended to replace the Bowden tubes every year.

Parts required:

  • 1 or 2x 1266 Bowden tube

Tools required:

  • None

Time:

  • 5 minutes

Disassembly

1. Remove the filament

On the Ultimaker 3, navigate to "Material/PrintCore > Material [x] > Unload."

Remove the filament from the feeder and turn off the printer.

2. Remove the clamp clips

  • Place the print head in the front-right corner.
  • Use your fingernail to remove the clamp clips from the tube coupling collets at the print head and feeder.

D01_Unload-material
D02_Remove-clamp-clip

3. Loosen the Bowden tube from the printer

  • Press down on the white tube coupling collet.
  • At the same time, pull the Bowden tube upwards, out of the print head.
  • Repeat these steps for the feeder.

4. Remove the cable clips

  • When removing the Bowden tube from Extruder 2 (right), loosen the four cable clips from the Bowden tube to remove it completely.

D03_Remove-Bowden-tube
D04_Remove-cable-clips

Reassembly

1. Note the orientation of the Bowden tube

  • Take the new Bowden tube and note the two different sides.
  • The side which is drilled should be inserted into the feeder. This allows easier access of the filament into the Bowden tube.
  • The flat side should be inserted into the print head.

2. Insert the Bowden tube into the feeder

  • Press down on the tube coupling collet in the feeder.
  • Push the Bowden tube all the way in.
  • Secure the tube with the clamp clip.

3. Insert the Bowden tube into the print head

  • Press down on the tube coupling collet in the print head.
  • Push the Bowden tube all the way in.
  • Secure the tube with the clamp clip.

R01_Orientation-Bowden-tube
R02_Insert-Bowden-tube-feeder

4. Divide the cable clips

  • When replacing the Bowden tube from Extruder 2 (right), click the header cable clips onto the Bowden tube.
  • Equally divide the clips over the Bowden tube.

R04_Divide-cable-clips

Download this information as a PDF

Index
Support