Start mining machine?

[Demens]

Spoiler below!

You need to put gas in it too, but the lid on the gas can is rusted shut. Combine the gas can with the hammer to open it, then throw it into the digging machine.

Thanx for your help. I don't see a gas can, do I fetch it from somewhere?

Here ya go.

Spoiler below!

The gas can found from the storage room, same place where you found the key.
If i remember right, it's in the room that has that steam-leak in front of it