Look at the existing door hinges and see if there is a little clip rivetted to the hinge. If so removal is easy. Open the door to 45 degrees and engage the little clips in the hook on the long top part that slides in and out the oven when you move the door. When the clips have engaged you can now lift the oven door and withdraw from the oven. Replacing the hinges is the reverse of that procedure but if the new hinge hasn't got the little clips on then you will have a bit of a struggle fitting the door and a bigger struggle if you ever have to take it off again. What I did with mine was to mark the shape of the old sliding arm onto the new arm on the new hinge and then with an angle grinder I carefully shaped the new arm to recreate the hook. The hook shape is missing on the new hinge. Once you've done that you can do a temp fitting of the little clips just to fit the new door. Use something very strong to put through the rivet hole on the clip and the hinge. Once the door is fitted, remove the clips and keep in a safe place for future use. When fitting the door make sure the notches on the bottom part of the hinge locate properly in the oven. Take great care as the hinge is under great tension from the spring when extended ready to fit to the oven.
RM, August 2008