Introduction
One of the biggest reasons you start to get a build up in the radix assembly in the first place is because of reduced airflow due to filter wear. For peak performance and maximum machine lifespan I would change the washable filter every couple of years.
(DYSON917819-01)
Tools
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Remove the seven torx screws which hold the top cover in place (one is located in the middle of the handle). You need a torx T15 driver for this.
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Remove the seven torx screws which hold the cyclone manifold in place. You need a torx T15 driver for this.
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Flip the assembly over and remove the three plastic tabs covering the screws, then remove the screws. When re-assembling note that the screw holes align only in one way.
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A good way to remove the tabs is to insert a small flat-head driver between the the tab and turn. (In the place marked in picture.)
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Take the the cyclone assembly apart by pulling the two pieces away from each other. Note that these parts may be stuck together so you might have to use some amount of force. You can now remove the gasket between the parts.
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When re-assembling note that you have to press the two pieces together really hard until you hear/feel a click.
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To reassemble your device, follow these instructions in reverse order.
