Before disassembly, please turn off the printer and disconnect the power supply to ensure safe operation.
Return the filaments inside the print head to ACE Pro, then pull out the four teflon tubes.
Use an S1.5 Allen key to unscrew the two screws holding the print head cable in place, then remove the print head cable.
Use an S2.5 Allen key to unscrew the four screws holding the print head module in place, then remove them from the bracket.
Replace the new print head module, align it with the holes in the support, and tighten the four screws holding the print head module using an S2.5 Allen key.
Insert the print head cable back into the print head module, then use the S1.5 Allen key to tighten the two screws holding the print head cable.
Press the black pneumatic joint and install each of the four teflon tubes back into the four-in-one-out assembly.