What's wrong when my phaser 6360 prints grey instead of black and I just replaced the black ink and it still prints grey

Do you need to change out your black color cartridge? Check your ink levels to make sure that you have plenty of each color. Also, check the settings for your printer (perhaps under "properties") and make sure that you haven't clicked on "grey scale". I hope that this helps.

Your machine uses solid ink wax blocks. So no calibration is necessary. Does the self test print look good. I suspected not.
Check out the Xerox.com website. It could be a problem as you machine is no longer sold.
Sorry.

INK PROBLEM
Inkjet printers need to be used frequently to prevent ink drying out and blocking the print head nozzles.
If the print head cleaning maintenance routine does not clear the blockages, then print head needs replacing, but it may be expensive.
It may be more cost effective to buy a later model and better printer than replace the print head.

Looks like you need to replace the imaging unit. Unfortunately, this an expensive consumable

you have the wrong drivers installed ie monochrome i have had this in the past with other printers make sure you have the colour ones

When you print something from a website and the print box comes up, click on preferences tab, and when it comes up click on color . Then click on print in grayscale and change the setting from High Quality to Black ink only, click apply at the bottom, then OK. It should print in black ink.

I had replaced the fuser - no improvement. I removed the fuser, imaging unit & transfer roller. CAREFULLY using a vacuum cleaner I cleaned all units and the internals of the printer, rotating the roller on the imaging unit to clean all parts. (Warning Place Imaging unit on paper as toner escapes) After a few test prints the page cleared and duplicate ghosting cleared.

Safe , most likely, recommended? I don't recommend using generic supplies in anything but ink ket printers. By that I mean the liquid inks. The toner is a phaser is pretty unique, and the OEM toner is by far the best way to go.

I have had to repair a few of these. Take off the sides and back of the 6360. You'll see the hoses that feed into the laser. The black one becomes unplugged from the laser. All you have to do is plug it back in. The next step can be kinda messy. Take out the black toner cartridge, and spin the motor backwards. You'll know you're going the right way because it won't turn the other way. Cycle the gear where the toner sits for about 2 revolutions. Reassemble and you should be good to go!

This thing took me 6 days to figure out the first time. Haha!

Please vote on my solution! Thanks!

I solved this problem but probably not what the printer manufacturer would recommend! The reason you are just getting grey is that the black ink cartridge is either empty or dried out from non use and only the color cartridge is working. I had the same problem after being away for 5 months. I put the printer cartridge in a bowl of warm water to disolve the dried out ink on the print pad. I dried off the cartridge with a soft cloth and then it worked perfectly.