Change front wheel on x300

It appears for have hidden spindles holding the wheels so would involve full disassembly. No one has documented this before

https://www.nilfisk.com/global/consumer/products/vacuum-cleaners/traditional/elite-energy-comfort-eu/c_107413385/

By the looks of it, you start with the 2 screws in the bag access bay and then keep going. This is a job that should be done by a service centre.

https://www.google.com/search?q=Nilfisk+Elite+Comfort+disassembly

The Parts Diagram shows all the relative parts and the wheels are held internally by one screw. Blow the PDF image up to 250%.

https://www.wap-nilfisk-alto-shop.de/media/pdf/83/5d/da/ET_Elite.pdf

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thank you and welcome to fixya i highly recommend changing it about every 1000 hrs of use but if you only use it for less than 30 minutes a day then it should be changed every 500 hrs or about 5 to 6 months me personally i do it every 4 months

if you have a tool like this one is easy
simply place the tool between the swive wheel and the base.
and downward pressure

by the picture of the
nilfisk a300 replacement wheels

its a pull off clip on type design
the axle should be metal

it will need some force to remove the old wheel
may even try to break the old wheel off in pieces

www.fixya.com/support/t10779019-pull_apart_nilfisk_action_plus_vacuum

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The Nilfisk X300 has a battery in the handle piece it would be worth simply replacing the battery. If that does not solve it you may need a new Nilfisk X300 Handle. It is possible that it is the receiver i teh machine but to be honest these are a pretty hard machine to work on and the circuit boards are all interconnected, this is a repair for an experienced player.

Hi There, I have made a quick video showing how to check the filters and also how to change the Nilfisk King Vacuum Bag. Take a look and you should be able to work it out.

Press the middle rectangular Nilfisk button in the top centre of the machine. The front cover will fold down. There is a greay retaining bracket which clips forward off the top of the old bag. Fold that forward, replace the bag, clip the holder back on, and then close the lid.

Not sure what a bacteria smell is perhaps you mean a mildew type smell.
If you have picked up something wet, start at the front of the vac and work your way to the exhaust.Change the front most filter first. Baking soda may help to eliminate some of the odor.
Personally as an allergy suffer, which you may be given the Brand I would remove all and let them and the tank air outside. Meanwhile install a fresh set.

Hi there SmartAlec from NelsonVacuums.com.au here. The part for your nilfisk x300 is called an accessory lid lock part number 1470184500. I am a nilfisk dealer so i can help you in getting this part. I think it is about $12. I will list it for you on my website NelsonVacuums.com.au or send me an email and i can organise an over the phone transaction. Hope this helps.
Happy Vacuuming! :)