Whose walkthru did you read?? Try this one - it has great maps!
http://www.volberding.com/WHints/index.html
From where you are you would have to go down the western trolley to locate the missing lever for the east trolley. I believe if you do NOT switch the switch that you might find down the west trolley, when you go down the right trolley you should come out in the area that you find the dragon ore.
Once you have that you can begin switching the switches west and east side to get to different locations including Raskallion if you happen to be on the assassin's quest.
Good Luck!
Wyv