You can find parts drawings and parts list for all Sears products at WWW.PARTSDIRECT.COM. That is the Sears parts store. All genuine Sears Parts send directly to your house....
You will need the model number from the plate on the vacuum....as you said--- 116.59429990
It will show you a blowup drawing of your power nozzle, you can then see what parts are missing in or broken in your unit....
VACFIXER
June 2007