HP 450c Service Manual - Page 144

Removing the DriveĆRoller Gear Removal 1. Remove the spittoon ' page 8Ć20. 2. Remove the two screws that secure the driveĆroller gear to the driveĆroller shaft. Torx-10 3. Remove the driveĆroller gear from the driveĆroller shaft. The gear may be stiff. Reassembling: The worm pinion and driveĆroller gear mesh slightly during use. Don't install a new motor and an old gear, or vice versa: install the gear that comes with the motor. Apply the grease that comes with the new motor to the worm pinion and driveĆroller gear. Reassembling: Push the gear onto the shaft as far as it will go. Align the holes on the gear with the holes on the shaft. Always calibrate the XĆaxis after reassembling the motor or the gear ' page 5Ć2. 8-22 HP DesignJet 430, 450C and 455CA Printers Removal and Installation