Neptune 4 Plus & 4 Max Extruder Gear Replacement Tutorial
Tools and materials needed
●H2.0 Allen wrench
●H2.5 Allen wrench
●Philips screwdriver
●Gear assembly
Reference video
Precautions and Machine state before starting operation
Before performing the operation, please turn off the machine and wait for the print head to cool down completely.
Extrusion Adapter Board Wiring Diagram
Operation steps
1-Remove the print head
1. Power off the printer, unplug the port cable of the fan assembly located directly behind the print head, use an H2.5 Allen wrench to loosen the four fixing screws of the "rear fan assembly", and remove the rear fan assembly.
2. Use an H2.0 Allen wrench to loosen the two fixing screws of the "cable fastener" and the one fixing screw of the whole print head assembly.
3. Press the "horn terminal" on both sides with your hands, the print head cable will pop up automatically, and then remove the print head cable.
4. Use an H2.0 Allen wrench to loosen the two fixing screws of the "print head front cover" and remove the whole print head assembly.
2-Replace the extruder gear
1. Separate the front cover of the print head assembly, and use a Phillips screwdriver to loosen the four fixing screws on the left and right sides of the "fan bracket".
2. Unplug the cables connected to the print head adapter board, remove the "fan bracket" assembly downwards, and unplug the extruder motor cable on the print head adapter board.
3. Use an H2.0 Allen wrench to loosen the two fixing screws of the "extruder motor" and remove the extruder motor.
4. Use an H2.0 Allen wrench to loosen a fixing screw of the "gearbox cover" and separate the "gearbox cover".
5. Take out the "Extruder Drive Gear", then take out the "Tensioning Gear", and finally take out the "compression spring assembly". (You can use a wrench or other tools to assist in lifting out the tensioning gear, and avoid automatic spring automatically popping up and loss throughout the process).
6. Take out the new gear assembly and install the "tensioning gear" first (align the dowel pin and insert it).
7. Then install the "compression spring assembly" (align the dowel pin to insert, and press down to install it in place).
8. Finally install the "extruder drive gear" (align the dowel pin and insert it, you can turn the gear left and right to check whether the gear is installed in place).
9. Install the "gearbox cover", observe the surroundings of the gearbox, and check whether the gearbox cover fits completely (If it does not fit, it means that the internal gear assembly is not installed in place).
10. Use an H2.0 Allen wrench to tighten a fixing screw of the "gearbox cover".
11. Align the extruder motor with the bearing hole, place it in the mounting position, and use an H2.0 Allen wrench to tighten the two fixing screws of the "extruder motor".
12. Insert the cable of the extruder motor into the "E0" port of the extruder controller board.
13. Place the "fan bracket" assembly in the installation position (align the screw holes on both sides for easier installation), and use a Phillips screwdriver to tighten the four fixing screws of the "fan bracket".
14. Insert the model cooling fan cables into the "FAN2" port of the extruder controller board (The two FAN2 ports on the extruder controller board are compatible with each other and do not need to be distinguished).
15. Insert the nozzle light cable into the "LED" port of the extruder controller board.
16. Insert the cable of the throat pipe cooling fan into the "FAN1" port of the extruder controller board.
17. Insert the proximity switch cable into the "PS" port of the extruder controller board.
3-Install the print head
1. Install the front cover of the whole print head assembly (It has a groove design and can be installed by sliding it in).
2. Place the whole print head assembly in the mounting position in front of the print head, and use a 2.0mm Allen wrench to tighten the two fixing screws of the "print head front cover".
3. Press the "horn self-locking terminal" to both sides with your hands to open the port, and then insert the print head cable into the port (note that the cable passes under the top profile).
4. Use a 2.0mm Allen wrench to tighten the two fixing screws of the "cable fastener" and the one fixing screw of the print head.
5. Align the fan assembly with the screw holes, use a 2.5mm Allen wrench to tighten the four fixing screws of the rear fan assembly (install with the air outlet facing downward), and insert the fan assembly into the cable port.
6. Power on the printer, click [Prepare-Temperature] on the touch screen, and then set the nozzle temperature to 210°C in the temperature control interface.
7. Press the extruder handle to feed the filament into the extruder. Click "Extruder" on the touch screen. After setting the length of the extruded filament, click "Load".
8.After observing that the nozzle extrudes filament normally, re-level the printer and it can be used normally.
