Here's a Silverball Mania shop guide...
http://www.jeff-z.com/pinball/sbm/repair/repair.html
I'm not any sort of expert, but I was in the mood to take a lot of pictures and write down every little thing I did.
I also have a picture page...
http://www.jeff-z.com/pinball/sbm/pics/pics.html
...and a rules page...