How do I break down the wall?

Hint 1 of 13:

This process involves several steps.

Hint 2 of 13:

Get the chain.

Hint 3 of 13:

Wrap it around the rod in the wall.

Hint 4 of 13:

Since it won't hold, you'll want something that will keep it in place.

Hint 5 of 13:

Lock the chain with the padlock (from the hatch leading to the tunnel).

Hint 6 of 13:

Head on up out of the shaft.

Hint 7 of 13:

And hand the chain to the hook on the bottom of the elevator.