¶ Operation Video
¶ Extruder Gear
The Extruder Gear is a key component that controls filament extrusion and retraction. It consists of the Driven Gear and Idler Arm. The Extruder Motor drives the active gear, which, together with the driven gear on the Idler Arm, grips the filament to push it downward for extrusion or pull it upward for retraction.
This guide explains how to replace the i7 Series Extruder Gear.
¶ When to Replace
The extruder gear is damaged;
Recommended by Creality After-sales.
¶ Required Tools
H2.0 Hex Wrench
Tweezers
¶ Safety Preparation
Power off the printer and unplug the Power Cable;
Before operation, ensure the Hotend and Heated Bed have cooled down to avoid accidental contact with hot components.
¶ Preparation
Perform Filament Retraction beforehand to ensure the Extruder Assembly is empty, which makes replacement easier.
¶ Remove the Old Extruder Gear
Remove the PTFE Tube from the Toolhead Manifold by pressing down the Pneumatic Fitting and pulling the tube out.
Remove the Toolhead Front Cover to expose the Toolhead Assembly and remove the Rotating Ornament.
Use tweezers to disconnect the top terminal, which is connected to the Cutter Sensor.
Open the Idler Arm and use the H2.0 Hex Wrench to remove the screws as shown in the diagram. Then remove the Idler Arm.
Continue using the H2.0 Hex Wrench to remove the screws securing the Extruder Front Cover, then remove the cover.
With the front cover removed, the black Extruder Gear is exposed and can be taken out directly.
¶ Install the New Extruder Gear
Prepare the new Extruder Gear.
Install the new gear into its original position, reinstall the Extruder Front Cover, and secure it with screws.
Install the new Idler Arm in the designated position, using screws to fix it in place.
Close the Idler Arm and reconnect the top terminal.
Reinstall the Rotating Ornament and Toolhead Front Cover, then reinsert the PTFE Tube. The printer is now ready for use.