These photos are of my lock unit removed from the case. (This is the opposite case from the unit shown in the photo above).
First remove the light grey lever case opening return spring.
The light grey latch lever is obstructing access to the lock barrel release latch.
Insert key and rotate fully anti clockwise. Open light grey lever. Without the spring fitted it will stay open.
Insert a thin screwdriver as shown and depress the barrel retaining lever.
The barrel with key can now be pulled out. The screwdriver is pointing at the barrel retaining lever which protrudes slightly.
When the correct lock levers and springs are fitted, they will be flush with the outside diameter of the barrel as shown here.
To refit the barrel, the case catches are closed and the locking catch that the lock barrel rotates is rotated completely clockwise with a flat blade screwdriver.
The lock barrel and key are inserted with the retaining lever facing outwards as shown. It should click into place.
Hi all. Let me first thank everybody in this thread for the conversation as this led me to victory ;-)
I have bought second hand Sport Panniers for my K1300S but it had the key of the former owner. Of course I wanted to be able to use my own ignition key for this. After examing the insight of the case and reading this thread I tried the following with success. While there was suggested in this thread to remove the whole mechanism from the insight of the case first I did not want to do that (and did not believe this was neccessary). I also wanted to share some pictures with you but not sure how to attach them.
Removed the middle screw in the insight of the case. The middle one of the 3 in triangle most outside of the case and almost inline with the lock. Took an electrical wire and stripped it for about 5 cm bending it for a couple of millimeters at the end of the wire. Now pushed the electrical wire in the whole for about 5 cm's (the one were I removed the screw offcourse) and tried to find the end of the lock were you have to press on the end pin for the lock to come out. After some tries succeeded with both cases. Programming both locks et voila!
PS: I think Tom is entering the cilinder back upside down and therefore you can't get to the pin anymore in the way I describe because than the pin ends up on the bottum side of the case and you can't get to it anymore through the whole.