Greetings,
first off, let me say this..its not intended to be used as a garbage disposal.. it has a strainer(screen) and a blade that grinds up food , but not like you would use in your sink disposal. its for small amounts of foodstuffs that failed to come off after you have rinsed off your dishes.
the lower spray arm by un-screwing the center cap clockwise (yes this is the opposite of normal threading direction, the plug will go down and out the back of the spinner).
5) Both the fine filter (round 8") and the water conduit leading back and up to the top will need to be removed.
6) The water conduit has to be removed. It might be possible to take it apart, but the more direct approach is to release the back (here) clip, and the top clip.
7) A similar clip must be released at the top:
8) With the water conduit released from the clips, the whole assemble must be rotated thirty degrees clockwise about the central pump outlet. This will release this plastic item from its bayonet mount there so it can be removed.
9) Remove this thing.
10) Remove first of three torqx screws to release the filter. The screws are at ten o'clock, eight o'clock and 4'clock. This is the eight o'clock screw.
11) Remove the second of three torqx screws to release the filter. This is the ten o'clock screw.
12) Remove the third of three torqx screws to release the filter. This is the four o'clock screw.
13) Remove the filter and base.