How To Remove Shower Pan
If this is the case you should attempt to move it further away from the wall using the pry bar.
How to remove shower pan. Be aware however that removing a shower pan requires a certain level of bathroom remodeling commitment. Check floor with a 4 foot level. The pan may be resistant at first.
Attach the strainer to the drain hole in shower pan. When the pan has been moved sufficiently you should hear a tearing or cracking. Install shims to create level surface.
Vacuum the subfloor clean of all dust and debris. In that case removing it may prove to be your only viable option. Removing a fiberglass shower pan is not as difficult as you migh.
If necessary use hammer and cold chisel to chop out any tile that extends under the pan.