HP LaserJet 4, 4 Plus, and 5 Printers Families - Replacing User-Replaceable Parts in a User Maintenance Kit

	User-replaceable parts
	Tray 1 paper pickup roller and separation pad
	Tray 2 pickup roller
	Transfer roller
	Fusing assembly
	Optional Tray 3 pickup roller
	Contact HP?

During the printer warranty period, HP recommends that only HP-authorized service technicians service the printer. After the warranty period, some worn parts can be replaced by the owner.

WARNING: Switch the printer off and unplug before replacing parts. Failure to do so may result in personal injury or damage to the printer. Allow the printer to cool for 30 minutes before replacing any parts.

Unless specifically noted, the replacement process is the reverse of the removal process. Always carefully observe the position and alignment of the part being removed; this is the best guide to replacement.

User-replaceable parts

 

Part Name	Part Number	Remarks
110V Maintenance Kit for LJ 4 Printers	C2037-37910	Kit includes commonly used parts to maintain 110V LaserJet 4/4 Plus printers: Tray 1 Pickup Roller, Tray 1 Separation Roller, Tray 2 Pickup roller, Transfer roller, 110V Fuser Assembly.
220V Maintenance Kit for LJ 4 Printers	C2037-37911	Kit includes commonly used parts to maintain 220V LaserJet 4/4 Plus printers: Tray 1 Pickup Roller, Tray 1 Separation Roller, Tray 2 Pickup roller, Transfer roller, 220V Fuser Assembly.
110V Maintenance Kit for LJ 5 Printers	C3916-69001	Kit includes commonly used parts to maintain 110V LaserJet 5/5M printers: Tray 1 Pickup Roller, Tray 1 Separation Roller, Tray 2 Pickup roller, Transfer roller, 110V Fuser Assembly.
220V Maintenance Kit for LJ 5 Printers	C3916-69002	Kit includes commonly used parts to maintain 220V LaserJet 5/5M printers: Tray 1 Pickup Roller, Tray 1 Separation Roller, Tray 2 Pickup roller, Transfer roller, 220V Fuser Assembly.
New Fusing Assembly	C2037-69001 RG5-0880-130CN	100-127 Volts. 220-240 Volts.
Rebuilt Fusing Assembly	C2037-69001 C2037-69002	100-127 Volts 220-240 Volts
Optional Tray 3 Pickup Roller	RB1-7983-000CN	See the user's manual, Chapter 7 for replacement conditions.
Transfer Roller	RF5-0349-000CN	See the user's manual, Chapter 7 for replacement conditions.
Transfer Roller Tool (hook)	RB1-7895-000CN	See the user's manual, Chapter 7 for replacement conditions.
Tray 1 Pickup Roller	RB1-2205-000CN	Replace the Tray 1 Pickup Roller and the Tray 1 Separation Pad at the same time.
Tray 1 Separation Pad	RF5-0343-000CN
Tray 2 Pickup Roller 4, 4 Plus Printer Pickup Roller 5, 5M Printer Pickup Roller	RB1-2126-000CN RB1-7911-000CN	See the user's manual, Chapter 7 for replacement conditions.

NOTE: Some of the part numbers for user replaceable parts as listed in the HP LaserJet 5, 5M and 5N User Manuals are incorrect. The correct part numbers are listed in the above table.

Tray 1 paper pickup roller and separation pad

Before beginning these steps, turn the printer off and unplug the power cord.

1. Open Tray 1 by pulling down on the top center of the front door.
2. Remove the envelope feeder access cover by grasping each side of the tab and pulling downward and out.
3. To release the Pickup Roller, pinch the retaining clip on the right end of the roller with the right hand while sliding the roller to the right with the left hand.
4. To remove the Pickup Roller, push in on the small plastic tab with the right hand while sliding the roller off the shaft with the left hand.
5. To remove the Separation Pad insert a flat-blade screwdriver into the indentation at the front of the pad. Carefully rotate the screwdriver to loosen the pad. When loose, gently lift out the pad.

Figure 1: Removing the Separation Pad

6. To install a new separation pad, place it over the opening and press it down firmly with the forefinger to seat it. Be sure the metal edge is toward the front of the printer.
7. To install a new Pickup Roller, slide it over the shaft and rotate it so that the flat side of the roller is aligned with the flat side of the shaft. Slide the roller to the left until it clicks into place.
8. Reinstall the envelope feeder access cover and discard the used roller and pad.

Tray 2 pickup roller

Before beginning these steps, turn the printer off and unplug the power cord.

1. Open the top cover and remove the toner cartridge.
2. Remove Tray 2.
3. Gently rotate the printer onto its left side so that the bottom of the printer is easily accessible.
4. To remove the Pickup Roller, pinch the retaining clip on top of the roller with the right hand while sliding the roller up off the shaft with the left hand.

Figure 2: Removing the Pickup Roller

5. To install a new Pickup Roller, slide it over the shaft and rotate it until properly aligned. Slide the roller down until it clicks into place.
6. Place the printer upright. Replace the toner cartridge and Tray 2. Plug in the power cord. Switch the printer on. Discard the used roller.

Transfer roller

Before beginning these steps, turn the printer off and unplug the power cord.

1. Open the top cover and remove the toner cartridge.
2. Remove the transfer roller hook tool, located near the left end of the inside front panel.
3. Lift up on the chrome shaft using the hook tool.

Figure 3: Lifting the chrome shaft with the hook tool

4. Lift the roller up and out of its retaining slots. Discard the used roller.

CAUTION: Be careful not to touch the black sponge-rubber on the new transfer roller. Finger oils on the roller can cause print quality problems.

5. Slide the right end of the new roller (the end without the gear) into the right slot. Press the gear end into the left slot until it clicks into place.
6. Replace the transfer roller hook tool and toner cartridge. Close the top cover. Plug in the power cord and switch the printer on.

Fusing assembly

Before beginning these steps, turn the printer off and unplug the power cord.

WARNING: The fusing area is hot. After unplugging the power cord, allow the printer to cool for at least 30 minutes before continuing.

1. After the printer is cool, open the rear cover.
2. Remove the 2 screws that hold the fusing assembly to the printer.

Figure 4: Removing the fusing assembly

3. See the Caution below, then gently lift the fusing assembly up and pull it straight out from the printer body.

CAUTION: Pull the fusing assembly straight out from the printer. Otherwise, the sensor lever, located on the right rear of the fusing assembly, may catch on the inside of the printer.

4. Slide the new fusing assembly firmly into the printer until the screw holes align, then replace the screws, tightening until snug.

NOTE: If the message 50 FUSER ERROR, CYCLE POWER appears in the display, switch the printer off and wait 15 minutes. If the problem continues, check the fuser installation again. If the problem still continues, contact an authorized HP dealer.

Optional Tray 3 pickup roller

Before beginning these steps, switch the printer off and unplug the power cord.

1. Remove both Tray 2 and Tray 3 from the printer.

CAUTION: The printer is heavy. Use two people to lift it.

2. Lift the printer from the Tray 3 Assembly.
3. Pinch the retaining clip on the right end of the roller with the right hand while sliding the roller off the shaft with the left hand (discard the used roller).

Figure 5: Removing the roller

4. Slip the new roller onto the shaft and rotate it until properly aligned. Slide the roller to the left until it clicks into place.

NOTE: If the roller is not installed correctly, it will make a grinding noise during printer warm up. If this happens, reinstall the roller.

5. Align the printer over the pins and connector on the Tray 3 Assembly, and set the printer on the assembly.
6. Replace Tray 2 and Tray 3.
7. Plug in the power cord and switch the printer on. If there are problems, check the installation instructions that came with the Tray 3 Assembly.