I would like instructions for my 402/ A-1. It was given to me and the brush doesn't work.

Sounds like the belt is broken or stretched, tip it over and remove the screws holding the brush in position and the cover and belt should come off.

this link is for the manual
http://www.eureka.com/FileLibrary/f3193922a9de44d6b4ee8db926c621d3/70878B.pdfhttp://www.eureka.com/FileLibrary/f3193922a9de44d6b4ee8db926c621d3/70878B.pdf

IT COULD BE STICKING TRY WD 4O OIL EACH SIDE OF ROLLER

see this causes and fix it. God bless you
If the vacuum cleaner brush is not spinning, the brushroll bearing might be jammed. Try removing the brushroll assembly and cleaning all hair, string, lint, etc. from the brushroll bearing. If that doesn't solve the problem the brushroll may need to be replaced.
If the vacuum cleaner brush is not spinning, the brushroll assembly itself might be jammed. Try removing the brushroll assembly and cleaning all hair, string, lint, etc. from the brushroll bearings. If that doesn't solve the problem the brushroll may need to be replaced.
If the vacuum cleaner brush is not spinning, the brushroll itself might be jammed. Try removing the brushroll and cleaning all hair, string, lint, etc. from the brushroll bearings. If that doesn't solve the problem the brushroll may need to be replaced.
If the vacuum cleaner brush is not spinning the cogged belt might be broken, stretched out too much, or might have fallen off. Check the belt and replace as needed.
If the vacuum cleaner brush is not spinning the drive belt might be broken, stretched out too much, or might have fallen off. Check the belt and replace as needed.
If the vacuum cleaner brush is not spinning the belt might be broken, stretched out too much, or might have fallen off. Check the belt and replace as needed.

Hi there,
I am sorry to hear you are having difficulty with your DC17. If the brush bar is not spinning it may be obstructed.
Please visit http://www.dyson.com/support/help.asp?article=956&product=DC17-ANIMAL for step by step instructions on how to inspect your brush bar and clear any obstructions that may be present.
Once you have carried out these steps you may need to reset your brush bar. To do this please plug your machine in, recline it as if you are preparing to vacuum a carpeted surface, turn your machine on and if the brush bar is not spinning push the silver button next to your power button one time. This should reset the brush and it should begin spinning immediately.
If you are still having difficulty with your machine please contact the Dyson US Helpline at 1-866-693-9766 or the Dyson UK Helpline at 0800 298 0298 so we can provide further assistance.
Best wishes,
Jessica

Check to see if the brush is turning when you have the vac on and the handel down 'of course keep your hands from that area when doing this ,you might have to lean the vac ,to see the resaults.

Remove the beater brush assy & remove the
shaft & brgs that go through it 7 clean out the
hair,fuss ect,so it will turn

You need to take your vacuum apart once a year or more
to clean things so they continue to work

Something is jammed in it or the belt is bad.Turn it upside down.You will see 4-6 screws.Remove the screws and the plate they are holding.Now the brush is exposed.The belt hooks on to the brush and a small wheel on the other end.Remove the brush and belt.Make sure the area is free of debris.While you have it off,replace the belt.

Please use the following link.
http://www.hoover.com/pdfs/manuals/U5180900.pdf

your roomba is thinking that you need to clean the brushes. if too much load it put on your brush motor--the unit will think that something is wrapped around the brush and slowing down the motor. if you have cleaned your brush and are sure that is not the problem; you need to look for anything else that could be slowing down the brush/motor. If this is inconclusive you need to put your roomba into diagnostic mode by following the procedures in the link below http://swiftracer.com/index.php?myPage=RoombaDiagnosticMode.php