Just borrowed our daughter's Hoover Aquamaster but there are no instructions. Can I download any please?

Sorry they don'nt have a manual for f5858-910 but if you go to this link below and click on a machine that looks like your's you can download the manual for that model , it mite give you some ideas,,
http://hoover.com/search/?q=spin+scrub&x=9&y=7

If you go to www.Hoover.com, , on the lower left you will find a link to download manuals. Put in your model as instructed.

Go to www.hoover.com then, towards bottom left of the screen, click on "Download Manuals". This opens a search window, in which you can enter your model number and then download a copy of the manual.
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Please reference this User Manual. Otherwise, please post the model number, from the data label. It should be something like F58XX-XXX

http://www.hoover.com/pdfs/manuals/F5807.pdf

Please reference the following manual:
http://www.hoover.com/pdfs/manuals/F5810.pdf

Operating instructions can be downloaded free from the Hoover website

The Directions can be downloaded from the hoover web site.

I’m happy to assist further over the phone at https://www.6ya.com/expert/robert_b96ba3f038cf317c

have you tried the manufacturers website. sometimes you can download the manual for your appliance

sounds like you need to attach the air hose

with reservoir in place you clip on the lid with tubes attached, one of them goes down to the floor cleaning nozzle, the other tube should be about 20cm long with an end piece,

this is the air hose and it fits into a small hole under the reservoir on the motor housing (the heavy mains powered part that clips onto the big recovery drum that sits on floor)

it's mentioned briefly in the manual, here it is in pdf form http://www.box.net/shared/rnh39ffjcq