First lock.... exciting!!
You're doing it good by cleaning it up. Most of the locks
I've ever purchased used were overdue for a cleaning.
Many were excessively greased. A common mistake.
In case you haven't found it, S&G has a "Mechanical Safe Lock Guide"
in pdf 2nd to last page
has recommended lubrication points. The very last page
contains an exploded parts view that may help you with the assembly
As far as mounting it, THIS
video was quite helpful with my
MartinHewitt wrote:.....I do not have a combination change key. From the look of the lock I would have expected it to be just a square rod with a rounded tip and a rounded part where the case cover opening is, but the key has a nose and looks differently. Is the nose to limit possible rotation? What I should I make it like?.....
It's never recommended to use anything other than the proper key for the lock.
HOWEVER, if you're not using this lock on a safe, but simply mounting it on a
board for practice... then there's certainly no harm in using something homemade.
The rounded tip you're wondering about; after passing through all the wheels, the
tip nests in a small hole in the bottom of the lock case. This helps maintain perfect
alignment of the key during the changing process. The rotational limits for the key
are created at the key hole in the lock cover. Take a look on the underside of the
cover and you'll see the couple raised areas around the key hole for this purpose.
But again, if you're just after a practice lock with no need for absolute exactness,
you might be ok foregoing some of the elements that a factory key normally has.
At its' core (minus all the precision) your goal is to simply disengage the inner hub
from the outer ring on all 3 wheels... dial in a new combination... then re-engage
so the inner and outer portions mate and become one unit again.
The pdf I referred you to also has combination change instructions.
Reading through that should also help you in making your key.