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HP Laserjet 4000/4050 Maintenance Kit Installation

Fuser Unit

WARNING! Let the Fuser Assembly cool before disassembly.
1 Remove the Rear Cover/Rear Output Bin

Removing the Left and Right Duplex Connector Covers (above diag)
2 If a Duplexer is installed, remove it. If a Duplexer is not installed,
remove the Left and Right Duplex Access Covers from the rear of
the printer by pulling each from the bottom.

Loosening the captive screws in the Fuser Assembly (above diag)
3 Loosen the two captive screws on the Fuser Assembly.
4 Pull the Fuser Assembly straight out of the printer.

Transfer Roller

Removing the Transfer Roller (above diag)
1 Open the Top Cover and remove the Toner Cartridge. The
Transfer Roller is underneath the Toner Cartridge.
CAUTION Do not touch the black rubber part of the roller. Skin oils on the roller
can cause problems with print quality.
2 Using a flat-blade screwdriver, pry the right end of the metal shaft
out of place, then the left end.
Hint When you replace the Transfer Roller, make sure the black collar is
oriented properly, with the open end down.

Tray 1 Pickup Roller

Removing the Pickup Roller (shown with Envelope Entrance Cover
removed - above diag)
1 Open Tray 1. The Tray 1 Pickup Roller is in the center of the
Tray 1 Pickup Assembly.
2 Grasp the Envelope Entrance Cover and pull it straight away from
the printer.
3 Pry open the blue latch on the roller.
4 Lift the roller out.
Hint To replace the roller, make sure the pin in the roller lines up with the
hole in the shaft.

Paper Feed Rollers

The following procedure is the same for all HP LaserJet 4000 and
4050 series printers; there are 2 Feed Rollers for the HP LaserJet
4000 T/4000 TN and 4050 T/4050 TN and one Feed Roller for the
HP LaserJet 4000/4000 N and 4050/4050 N printers.

Removing the Paper Feed Rollers (HP LaserJet 4000 T/4000 TN and
4050 T/4050 TN shown - above diag)
1 Remove the tray(s) from the Feeder. The Paper Feed Rollers are
inside the Feeder.
2 Pinch the release at the left side of the Roller and slide it off the
shaft.

Separation Rollers

Removing the Separation Rollers (above diag)
The Separation Rollers are inside the paper trays.
1 Release the latch and lift the cover inside the tray.
2 Pinch the release at the left side of the Roller and slide it off the
shaft.

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