Hi, it's Jeremy from Crucial Vacuum.
To attach the upper handle to your Hoover Steam Vac remove the clean solution tank (upper tank) from the deep cleaner. Then, attach the upper handle to the lower handle by pushing the upper handle down onto lower one. Use the provided bolts to secure the handles. Push the bolts into the accompanying holes on the front of handle. If the bolts do not go through the holes easily, your handle is not pushed completely down. When the handle sections are completely together, squeeze the trigger on the upper handle to snap the trigger rod into place.
If you require further help with your assembly, you can find a step-by-step manual at: http://www.searspartsdirect.com/partsdirect/user-manuals/f5865900-hoover-parts-steam+vac-manual
You can also purchase all of your Hoover Steam Vac replacement parts from Crucial Vacuum with free shipping and an exclusive 10% coupon for Fixya.com readers, use code: FIXYA10
I hope this was helpful. If you would like further assistance, please feel free to give us a call at 877.750.9239. We have helpful and friendly customer care representatives on the line ready to assist you.
Crucial Vacuum Customer Care