Well I turned it on and it nearly ran me over
the brush was set too low so dug into the carpet, the vacuum version of this must be a nice machine on open areas as the pile lifting ability of the brush is very impressive.
Can't work out how it puts down the solution, it looks like it blows air into the tank to create a foam, filled it with just water and nothing happened, the tank was bubbling but none was being ejected onto the brush.
Might try and find a manual on the web.
The brush is good, even if the main machine is a dud I can adapt the brush as a stand alone tool