Hi James, it was quite easy for me to get the pump off. On the pump there are 2 small screws and two larger bolts. The bolds attach the pump to the car and the screws hold the cover on to the pump. Removing the screws lets you manipulate the cover off the pump which will give you enough clearance to get the pump past the flange. This is a good video of how to do it.
https://www.youtube.com/watch?v=uZNC06Z7imQ