When there is a lot of material residue and debris inside the filaments hub, which increases the resistance of feeding and returning filaments, it is recommended to disassemble the filaments hub for internal cleaning.
Please refer to Replace AMS filaments hub to remove the filaments hub from the AMS and separate the motor.
Unlock the 4 claws and remove the button.
Remove 4 screws with an H1.5 hex key, and then remove the protective cover and the driving gear unit.
Remove 6 screws with an H1.5 hex key, separate the upper and lower shells of the filaments hub. Be careful that there may be tube fittings loose when disassembling.
Remove material residue and dust with the cleaning tools from the gears, tube fittings, passages and some clearances.
Make sure that the 4 magnets are facing the correct direction. If you find that the direction is wrong, please refer to Remove and install the magnets in filaments hub to reinstall the magnet in the wrong direction after completing step 10 on this page.
After the cleaning is complete, install the 5 tube fittings.
The upper and lower shells of the filaments hub can be initially fixed by the 6 claws, and then lock in 6 screws.
Install the driving gear unit of the filaments hub and its protective cover, and lock in 4 screws.
Install the button of the filaments hub, and press the button to confirm that the action is smooth.
Please refer to Replace AMS filaments hub to install the motor on the filaments hub and assemble the AMS.
Connect the AMS to the printer and turn the power ON. Load filaments to all slots of the AMS and click "Load" on the screen to start loading the filament.
After the filament in slot 1 loads, choose AMS slot 2 to load the filament in slot 2, and then load the filament in slot 3 & slot 4.
If all the loading process functions are OK, the installation is complete and successful.
Otherwise, check the connections of all the cables and PTFE tubes. If no errors are found and the malfunction continues, contact the Bambu Lab service team for further assistance.