¶ Video Guide
¶ Illustrated Guide
¶ Hotend and Silicone Sock Overview
¶ When to Replace the Hotend Kit
Consider replacing the hotend if:
- The nozzle repeatedly clogs and filament still does not extrude properly after repeated unclogging attempts, including cleaning with a nozzle cleaning needle.
- The hotend heats slowly, cannot maintain a stable temperature, stops heating, or has a temperature control fault.
- The silicone sock is torn or deformed, or the nozzle is visibly deformed or loose.
- There is significant filament leakage or dripping, indicating a possible sealing problem.
- The nozzle is severely worn, affecting print accuracy, and replacing the nozzle alone is not an option or does not resolve the issue.
¶ Tools Required
- Replacement hotend
- Replacement silicone sock
¶ Safety Precautions
IMPORTANT
- Before servicing the printer or its toolhead cables, turn off the printer and unplug the power cord to prevent short circuits, equipment damage, and electric shock.
- Allow the hotend and heated bed to cool to room temperature before maintenance or troubleshooting. Do not touch hot components with bare hands. If a separate procedure requires working on hot components, wear heat-resistant gloves to prevent burns.
- If you have any questions about this guide, submit a support ticket for assistance.
¶ Remove the Old Parts
¶ Remove the Toolhead Front Cover
Press both sides of the toolhead front cover to release it, then remove the cover. Keep your fingers clear of the hotend cooling fans on either side. The release points are shown below.
¶ Remove the Silicone Sock and Hotend
- Remove the silicone sock.
- Check whether any melted or cooled filament is stuck around the nozzle. If necessary, heat the hotend to 200 °C.
- Release the hotend retaining clip and push it upward. This exposes a gap between the hotend and the cutter.
- Pull the hotend straight down to remove it.
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¶ Install the Replacement Parts
¶ Install the Hotend
If the replacement nozzle has different specifications, update the nozzle settings on the printer before printing.
- Hold the hotend with its heatsink fins and position the nozzle in the opening at the bottom of the heating assembly.
- Push the hotend upward until the nozzle is firmly seated in the opening.
- Holding the heatsink fins, push the hotend inward toward the heating assembly until the heatbreak sits flush against it.
- Grip the hotend spring clip and lift the hotend until its filament inlet aligns with and meets the cutter opening.
- Engage the metal spring clip in the retaining slot on the cutter assembly.
- Press the spring clip down to lock the hotend in place.
Check the installation in both directions:
- Front view: The heating assembly should fully surround the nozzle at the lower end of the hotend.
- Side view: The heating assembly and heatbreak should be vertically aligned.
7. Fit the silicone sock over the hotend.
¶ Reinstall the Toolhead Front Cover
Align the tabs at the top of the front cover, then gently press the bottom of the cover into place.
¶ Check the Installation
Once reassembly is complete, turn on the printer and perform the following checks:
- Run a hotend heating test. Check that the hotend heats normally and maintains a stable temperature without unusual fluctuations.
- Load filament and run a test print. Check that extrusion is smooth and consistent, with no obvious signs of a blockage.
- Check for filament leaks, excessive dripping, or unusual smoke around the hotend.
- Check that the toolhead moves normally and that the hotend does not collide with or scrape the build plate.
If heating is abnormal, a temperature control error appears, or filament does not extrude properly, turn off and unplug the printer. Allow it to cool before checking the hotend position, retaining clip, and silicone sock.