Hi there, it's Jack at Dyson.
I'm not sure from your question which aspect of your Dyson DC40 you want to take apart. However, please be aware that dismantling your machine any further than is shown in the User guide can void your Dyson guarantee, so we strongly advise against this.
If you're having difficulty with your DC40, you should be able to resolve this quickly and easily following the simple troubleshooting checks shown in our Support pages. Just select the menu option that's relevant to your issue:
http://www.dyson.co.uk/support/dc40/dc40-multi-floor
If you would like some further help or advice from our experts, you're welcome to give the Dyson Customer Helpline on 0800 298 0298 (UK), 1-866-693-9766 (US), 1-877-397-6622 (CA) or 1800 239 766 (AU). If a repair or replacement part is needed, we can also confirm whether this is covered under your Dyson guarantee.
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