Need to change the cylinder on a security screen door?
note: you will need a working key for your existing cylinder to perform this task.
Firstly, for a Whitco MK II Tasman lock the lock needs to be in the locked position.
To do this, when door is open you will need to press the deadlatching pin which sits above the main latch
Next, you will need to undo the cylinder retaining screw
Then insert and turn key to lock position.
Cylinder will then pull out
Now follow steps in reverse with replacement cylinder.