Just added a Windows-shared printer (Win XP) on my Mac 10.9.5 using the Windows sharing protocol.
1) Go to the Dell, and double-check that the printer is "shared." I think it is already. Note the "shared name." That's the queue name, although we probably won't need to type it anywhere.
2) On the Mac, download and install Gutenprint drivers. This is necessary, because the LJ4000 uses the PCL page language on Windows, but the Mac driver defaults to postscript. Different languages means the print jobs won't go through. Gutenprint gives us a PCL driver for the LJ4000 to match what's being used by Windows.
3) On the Mac, go to Syst Prefs > Print & Scanning, and click " + " to add a printer, and select Add printer or scanner in the drop-down.
4) The Add printer dialog comes up. Probably shows you the "default" window. On the right side of the top, does "Windows" icon appear? If not, right-click or Command-click near the word "Add," and Customize the menu to have Windows as an optional icon along the top.
5) Now click on Windows to continue adding. a Selector box comes up and you select "workgroup," "server_name," and printer's "sharename." Note that workgroup is the default workgroup name for Macs and Windows. If you use something else, this step may need to change (the Mac needs to be in the same workgroup as the print server for this to work easily)
6) Select driver software - use Gutenprint LJ 4000.
7) Finish and try it.