1.Adjust tail platen to the end , it should be in the largest distance with the second platen ;

2.Lift the two tie bars to change the iron sheet and the hose

change iron sheet1
change iron sheet2

3. Three steps to fit

1)Fix the two screws as below

change iron sheet3

2)  tensing iron sheet as hard as you can

change iron sheet4

3) fix the last two screws

change iron sheet5