HP LaserJet P2055dn -- Fuser Replacement

Fuser P/N is RM1-6405. The removal procedure for this fuser is a bit more intricate than for most fusers, but it's quite straightforward. Proceed as follows:

1) Cartridge

2) Tray 2

3) Left Side Cover
- Front door open.
- Pry at front lip and at centre of top lip to free the cover.
- NOTE: The small claw at the centre of the top lip is liable to break. No real harm is done by that.

4) Right Side Cover
- Open the upper back door (green handle).
- Pry at top and bottom of rear lip.
- Pry at top lip near 'Ready' indicator.

5) Rear Cover w/Duplexer Platform
- Lower the duplexer platform (press on the green tab to the left of the Tray 2 pickup roller).
- Close the upper back door.
- Open the lower back door.
- Five M3x8mm washerhead screws.
- One small claw at the extreme lower right.
- Slide the assembly out the back.

6) Reverse Sensor Assembly (The prominent sensor at the rear.)
- One M4x10mm bright pan head threading screw.
- One three-conductor cable connection.

7) 'In-The-Way' Cabling
- The cabling that runs under the reverse sensor has nothing to do with the fuser's connections, but it must be freed and moved aside.
- Six cable connections. 'Best to disconnect them in sequence from your right to your left. Reconnect them in the reverse sequence.

8) Media Feed Guide
- One M3x6mm black washerhead screw at centre.
- Slide the item to your right to free it.
- NOTE how the item hooks a two-conductor blue cable.

9) Fuser Cabling
- One red/blue/green fuser exit sensor cable.
- One two-conductor blue thermistor cable.
- One white wire at the extreme left.
- One two-conductor power connector at the extreme right. (Press its latch tab forward.)

10) Three Gears
- NOTE: The front door must be closed for this step.
- At the right side, there are three gears accessible for removal.
- Frontmost, largest gear -- one claw.
- Upper, smallest gear -- one claw.
- Rearmost gear with 'handle' -- one claw. You may have to nudge it CW a bit to get it out. NOTE that there's a timing relationship associated with this gear. The flange on its inboard end is notched to preclude getting it back in place out-of-time with the sector gear below it. A protrusion on the top of the gear aligns with a notch in the gear above it.

11) Fuser
- Three^[1] M3x8mm washerhead screws.
- NOTE that the two lower screw holes are for the rear cover.
- Slide the fuser out the back.

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Note:

[1] The new OEM replacement fuser had holes for only two upper fastening screws. The hole for the third fuser fastening screw had been deleted.

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