Removing the brass pipe
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2006 Volvo S80, 2005 Volvo S80, 2004 Volvo S80, 2003 Volvo S80, and 2002 Volvo S80. However, it is still accessible from the selected car via links, so may be relevant.
Remove the bevel gear. See:
Pull out the brass pipe using cutting nippers.
Tap in the nipple using a rubber mallet.
Install the filter on the nipple.