|Lever of the Axe|
|Lever of the Jewel|
|Lever of the Moon|
|Lever of the Sun|
'Finally! It's working.... I think.
'I'm going to have to stay here to care for this machine. You go open the vault! It's quite a distance away -- on the other side of Thorin's Hall -- here, to the north and up the stairs. The chains and cables run all through the walls -- a real work of art!
'Make sure you get the order of the levers right, or you'll have to come back here so I can reset the gears. Perhaps those clues you found in the boxes will help with the order.'
Now that you have assembled all the gears, it is time to open the vault.
You found these clues:
The axe bites deep before first light of the sun.
The sun rises after the moon has set.
A jewel may be found in the light of the sun.
Jewels are only found after much hard work.
Before all else, the silvery light of the moon can be seen.
Pull the first lever, which is the Lever of the Moon.
The vault is across Thorin's Hall to the north and up the stairs. Pull the vault levers in the right sequence. If you make a mistake, go back to Bavor Redstone to reset the gears.
Pull the second lever, which is the Lever of the Axe.
Pull the third lever, which is the Lever of the Sun.
Pull the fourth lever, which is the Lever of the Jewel.
Opening the puzzle-vault will grant you with the Crown of the Mountain. Bring the contents back to Bavor.
The levers are in the main hall. Go north past the statue to get into the long hall, go up the first set of stairs to the right, the levers are basically right in front of you, and the vault is the bottom of the column right next to the levers. You get something that looks like an old rock, but that is the item.
To reiterate, the order is Moon, Axe, Sun, Jewel. That's 1, 3, 4, 2