Note: This page uses the H2D machine as an example. The replacement Steps are exactly the same for the H2C.
Important Reminder
The fan connectors on the H2D feature this compact connector design. When removing the connector, please hold the base of the connector with your hand and lift straight up, perpendicular to the PCB surface, to unlock it. Never apply force in the horizontal direction to avoid damaging the connector.
The part cooling fan
The part cooling fan is installed on the back of the tool head. It is used to rapidly cool the extruded filament together with the part cooling fan duct. The details of the part cooling fan and accessories are as follows:
Part cooling fan * 1
BT2.6x8 - Used to secure the part cooling fan * 2
BT3x20 - Used to secure the part cooling fan * 2 (thread length 8mm)
When to replace
Abnormal noise from the part cooling fan
Malfunctioning of the part cooling fan
Tools and materials needed
H2.0 Allen key
A new part cooling fan
Safety Warning
IMPORTANT!
It's crucial to power off the printer before performing any maintenance work on the printer and its electronics, including toolhead wires, because leaving the printer on while conducting such tasks can cause a short circuit, which can lead to additional electrical damage and safety hazards.
When you perform maintenance or troubleshooting on the printer, you may be required to disassemble some parts, including the hotend. This process can expose wires and electrical components that could potentially short circuit if they come into contact with each other or with other metal or electrical components while the printer is still on. This can damage the electronics of the printer and cause further damage.
Therefore, it's essential to power off the printer and disconnect it from the power source before doing any maintenance work. This will prevent any short circuits or damage to the printer's electronics. By doing so, you can avoid potential damage to the printer's electronic components and ensure that the maintenance work is performed safely and effectively.
Если у вас есть вопросы или сомнения по поводу следования этому руководству, пожалуйста, обратитесь в техподдержку.
Video Guide
Disassembly Guide
The disassembly steps in this wiki are excerpted from the comprehensive tool head disassembly guide. In fact, when replacing the part cooling fan, there is no need to remove the PTFE tube, tool head front cover, and left and right hotends. Please disassemble and assemble as needed.
Step 1: Remove the part cooling fan duct
Use a H2.0 hex key to remove the four fixed screws (BT3x8).
Hold the rear end of the part cooling fan duct and pull it downwards to remove the duct carefully.
Step 2: Remove the part cooling fan
Use a H2.0 hex key to remove the four fixed screws.(BT3x20 marked with a square symbol, BT2.6x8 marked with a circle symbol)
Tear off the acetate tape of the plug, then unplug the plug. You can leave the removed tape on the circuit board for easier installation later on.
Please note that this type of plug should be carefully pushed upward along the plane where the plug is located, rather than pulled out along the direction of the cable. Please follow the operation in the video to avoid damaging the plug.
Assembly Guide
Step 1: Install the part cooling fan
With the metal side facing up, align the interface, then press down the part cooling fan plug and stick back the acetate tape.
Align the screw holes, cover back the part cooling fan, and tighten the 4 fixing screws.(BT3x20 marked with a square symbol, BT2.6x8 marked with a circle symbol)
Step 2: Install the part cooling fan duct
The left hotend heating assembly cable needs to be installed in the cable management slot. Before installing the duct, make sure to press the hotend heating assembly cable into the cable management slot to prevent the duct from pressing on the cable.
First, install the front 1/4 of the duct to make it easier to tilt the rear half of the duct, avoiding interference with the nozzle camera. Then, grasp the rear half of the duct and push it upwards.
After pushing it in, gently bend the sides of the duct outward, slotting them onto the tool head on each side, and then firmly press the duct upwards to secure it in place.
Next, push the top of the front section of the duct forward to ensure a snug, gap-free fit.
Use an H2.0 hex key to tighten the four fixing screws (BT3x8).
How to verify completion/success
Connect the power supply and turn on the printer. On the screen, turn on the part cooling fan and check if it can spin properly. If the part cooling fan can spin smoothly without any abnormal sounds, the replacement is successful.
If it fails to start properly, please check if the cables are connected correctly.
Если проблема сохраняется, обратитесь в команду поддержки Bambu Lab для получения дальнейшей помощи.