Doug,
Look at [http://neilcrockett.com/mixer.htm|this guy's website] where he takes it all apart with just a phillips head screwdriver. He has it quite far apart changing a gear, but if you look at one of the photos, you can see where there are four screws that hold the top part on. If you remove that I think you will have access to the lift handle.
Otherwise, I found another [http://www.ehow.com/how_5912005_tighten-lever-kitchenaid-mixer.html|solution] here.
Regards,
Frank