remove plastic clamp from front rubber/cabinet.now push your fingers down hard into door gasket at 6 o clock position where it meets the grey outer tub and then pull towards you hard.fitting it back is an art form that i can not describe as it would make no sense.lots of people give up after several hours trying to fit them back on.
ck, July 2008
edit
I can answer this question...
Changing door door bellow on Zanusi Washer IZ 161 W?