Replace the S-line Bowden tubes

The Bowden tubes guide the filament from the feeders to the print head. Over time, the inside and outside of the tubes may have become scratched. This can cause print quality issues, or the tubes are not held securely in place anymore.

It is recommended to check the surface of the Bowden tubes once a year. Replace them when necessary to retain optimal print quality and reliability.

Caution: After unloading the material(s), turn off the printer or ensure it is disabled in the Ultimaker Digital Factory to prevent new print jobs from starting remotely.

Requirements and info

Part(s) 1x 226572 - Bowden pack L705 (for Ultimaker S3)
1x 227177 - Bowden pack L850 (for Ultimaker S5)
Tool(s) None required
Time 3 - 5 minutes
Difficulty level 1 - Easy

Tip: The Bowden packs also include a new set of tube coupling collets and clamp clips. You can replace these at the same time, or keep them for later.

Disassembly

Tip: For the Pro Bundle, open the Air Manager cover during this repair procedure. Only start this repair when all materials have retracted to the Material Station.

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1. Unload materials 2. Remove feeder clamp clips

In the Configuration menu, select Unload for both materials. Take the filament out of the feeders. You can, but do not have to, remove the spools from the spool holder. Next, turn off the printer.

 

At the back of the printer, remove the clamp clip from the tube coupling collet at the top of the feeder. Do this for both feeders.
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3. Remove feeder Bowden tubes 4. Remove print head clamp clips
Press down on the tube coupling collet while pulling the Bowden tube out of the feeder. Do this for both feeders.

Place the print head in the front-right corner for easier access and remove the clamp clips from around the tube coupling collets.

 

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5. Remove print head Bowden tubes 6. Loosen cable clips

Press down on the tube coupling collet while pulling the Bowden tube out of the print head. Do this for both sides.

 

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

 

Reassembly

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1. Note the two sides 2. Insert into feeder

Take the new Bowden tube and note the two different sides. The chamfered side should be inserted into the feeder. The flat side goes into the print head.

Tip: If both sides are chamfered, the orientation does not matter.

Insert the chamfered side of the Bowden tube into the feeder. Keep the collet pressed down and push the Bowden tube all the way in. Secure the tube with the clamp clip.

Tip: If you have an Air Manager, first guide the tube through the slot in the mounting bracket.

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3. Insert into print head

4. Place cable clips

Insert the other side of the Bowden tube into the print head. Keep the collet pressed down and push the Bowden tube all the way in. Secure the tube with the clamp clip.

 

For Bowden tube 2 (right), click the header cable clips from the print head cable onto the Bowden tube. Equally divide the clips over the Bowden tube, starting at ~10 cm above the print head.

 

You can now turn on the printer again and reload your materials.

Tip: Always cut off the end of the filament in a nice, sharp tip before loading. This prevents scratching or friction inside the Bowden tubes and keeps the tubes in optimal condition.

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