Brake Dust Washers

[50Trucking]

I am rebuilding the brakes on my 31 coupe and have removed the brake adjusting wedge and cleaned the threads with a tap and reinstalled the wedge' Now I need to re-install the dust washer that covers the adjusting wedge. Does anyone know of an easy way to open up the area where the dust cap inserts into the wedge housing? It has to be opened up, install the dust washer and then re crimped to hold it in.