Electrolux EWF1284EDW Service Manual page 85

Insert the screwdriver, with the handle tilted towards the right.
Push the left-hand tab downwards.
When the two tabs are down.
Move the blade towards the front of the drum.
Before securing the new blade.
Insert a flat-tip screwdriver beneath the tabs and raise them a little.
Position the new blade inside the drum guides.
Push it towards the back.
Insert the flathead screwdriver at a right angle to the blade, so
as to position it at the centre of the two tabs.
Move to the left and right.
So that the tabs are moved upwards (as indicated by the arrows in
the figure) and they are insert inside the blade, securing it to the drum
(as shown in the figure).
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Technical Support - MDM 599 76 11-68 Rev. 01