You should be able to "lock" the hinge to enable you to refit it easily :- put door on table and press down on long part of hinge (top arm) till it is fully compressed then move the little "T" shaped tab forward to catch the arm and hold it in locked position, do same with other hinge arm. Then enter top arms in oven housing they will fit easily if you have locked it correctly, then enter lower arms in housing until they drop down slightly, they have a little slot that fits over the socket edge. Then when these have located open the door and the locking tabs for the top arms will automatically release- job done Cheers
Kenjo
July 2012