Now that the tumbler is apart, you can see how the brass pins stick out and prevent the lock from turning unless the key is just right. With the key inserted, some of the pins were still sticking out a little bit. Having multiple keys or items hanging off the keyring can accelerate wear.


The pins just slide out along with the springs. I cleaned the parts very well with biodiesel and then brake parts cleaner.


Make sure you keep the pins in order! I filed each pin until it was lower than the housing so it will take a very long time before they wear out and start grabbing again. I only lubricated the inside of the main housing, but not the pins or the pin housing. I think that as far as pins are concerned, cleanliness is more important than lubrication as they are a loose fit and any stickiness will cause issues. That's probably why locksmiths use WD-40 in locks--they are more concerned with cleaning out gunk than in lubricating the lock.


What's nice is the key turns smoothly and I've tried other W116 keys, and they won't unlock it, so it is secure. The key also won't just fall out as it would if I had just removed the pins entirely. In theory, I should be able to do the same thing with my door locks so I can use the ignition key on every lock on the car. At some point both front door handles were replaced, and neither of them match the ignition key, though I have a separate key that opens one of them.

__________________
Stop paying for animal enslavement, cruelty, and slaughter. Save your health and the planet. Go vegan! I did 18 years ago. https://challenge22.com/

DON'T MESS WITH MY MERCEDES!


1967 W110 Universal Wagon, Euro, Turbo Diesel, Tail Fins, 4 Speed Manual Column Shift, A/C
1980 W116 300SD Turbo Diesel, DB479 Walnut Brown, Sunroof, Highly Optioned, 350,000+ Miles