This is a paper feed guide assembly, or we sometimes call it the small media assembly or transfer roller assembly. HP part# RG5-2643-000CN. The assembly does not include the transfer roller, it is the assembly as pictured. Fits any of the following printers: HP LaserJet 4000, 4000N, 4000TN, 4000DTN, 4050, 4050N, 4050TN, 4050DTN. This item is a common replacement part when the retaining tabs for the transfer roller break and the transfer roller no longer locks in place.

As these printers age, the plastic used in the retaining tabs that hold the transfer roller bushings in place gets brittle and easily breaks. In some cases we’ve seen these tabs break simply by removing the toner cartridge. We have a simple permanent fix for this. We insert a metal pin that is sturdier than the tab that breaks to retain the transfer roller bushings. If you buy this assembly from us we’ve installed the pins to fix this problem, if you buy it elsewhere you’re taking a chance. Our advice is that if you have a Laserjet 4000 or 4050 where the metal pins haven’t been installed don’t touch or remove the transfer roller. If the retaining tabs break you’ll either have to send the printer in to us for repair or buy another printer.
Please note replacing this piece is considered an advanced repair.. The repair is not discussed in the service manual. The printer must be completely disassembled to replace this part; if you have never done this repair you can estimate several hours labor. For folks not comfortable with that level of un-guided disassembly, we recommend you buy one of our refurbished printers of the same model.