Replace the Ultimaker 3 tube coupling collet

The tube coupling collets hold the Bowden tubes in place in the print head and feeders. The collet has small metal tabs on the inside that grip the Bowden tube to keep it in place.

Over time, these tabs can wear out or bend outwards. When this happens, the collet’s grip on the Bowden tube loosens, which can negatively impact print quality. Replace the tube coupling collet if it appears damaged or worn following the instructions below.

Caution: After unloading the material(s), turn off the printer or ensure the Ultimaker 3 cannot accept new print jobs through the Digital Factory.

Requirements and info

Part(s) 1 - 4x 1069 - Tube coupling collet
Tool(s) None required
Time 1 - 5 minutes
Difficulty level 1 - Easy


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1. Unload material(s) 2. Remove clamp clip

In the Ultimaker 3 menu, go to Material/PrintCore - Material [X] - Unload. Select the material(s) for the side(s) where you want to replace the collet. You do not have to remove the spool from the spool holder.


Place the print head in the front-right corner for easier access and remove the clamp clip from around the tube coupling collet.
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3. Remove Bowden tube 4. Remove tube coupling collet

Press down on the tube coupling collet while pulling the Bowden tube out of the print head or feeder.


Place your fingernail under the edge of the tube coupling collet and pull it out of the print head or feeder.



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1. Insert tube coupling collet 2. Insert Bowden tube

Push the four legs of the new tube coupling collet slightly inwards and insert it into the hole in the print head or feeder.


Keep the collet pressed down while pushing the Bowden tube back into the print head or feeder.
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3. Place clamp clip 4. Reload material(s)
Keep the Bowden tube in position and place the clamp clip around the tube coupling collet to lock the Bowden tube in place.

In the Ultimaker 3 menu, go to Material/PrintCore - Material [X] - Load. Insert the material into the feeder and follow the instructions on the display.


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