Your question could be asking several things:
A copy of the manual can be found here at Sears (
) if you are just looking for something that points to different parts of the vacuum and says what is where. A better copy is here (
Dyson DC18 Setup Guide
) (Trying to avoid places where you have to add some downloader bloatware to view the pdf).
If you're saying that the product is broken down, you'll need to be more specific. The manual covers general clearing of clogs and emptying. The most common aggravating situation I've seen in there for Dyson is that the upright units pretty much all shut off the brush head and suction when the vacuum is in the full upright position. This is the 'use the accessory tube' position where the suction is channeled up the handle. If you don't know that, and that there is either a button or hand-switch (For the DC18, a switch next to the main power button) that turns the brush on and off), then you can have lots of mystery working/not working behavior depending on whether the system is upright and whether the brush clutch is engaged.