Hi. First turn the mains power off.
remove all cooker knobs and timer buttons. then remove the face place lifting bottom out and up carefully whils sliding keft to remove.
then you will see two screws holding hib top down also two on back. do not remove the two rear screws with plastic cup washers on as these secure elements to hob.
gently lift hob up and back making sure not to pull any wires off.
now you will see rear of timer shell. two press lugs on left and right will allow you to withdraw timer forward now. make a note of the wires lication in board for refitting.
shark1e
October 2011