HP LaserJet Pro 300 Color MFP M375 - Manual (Page 109)

3. Grasp the handle on the old print cartridge
and then pull the cartridge straight up to
remove it.
4. Remove the new print cartridge from the
packaging.
5. Gently rock the print cartridge from front to
back to distribute the toner evenly inside the
cartridge.
ENWW Replacement instructions 93