Whilst this is a photo copy, and some of the pages are a little askew, it was all readable and intact. A real bonus finding an old manual for a classic piece of kit that no other site had.
Thanks to Owner-Manuals.com! This manual was exactly what I needed. As Amana was purchased by Maytag and later by Whirlpool, there was no way to receive it from their websites. I was lucky to find this resource.
Text excerpt from page 29 (click to view)
Cleaning the Filter
The filters should be checked and cleaned regularly. Dirty filters will give poor wash results. 0 1. Open the door, remove the lower basket. 2. The dishwasher filter system comprises a coarse/fine filter, microfilter and a flat filter. Unlock the filter system using the handle on the microfilter, and remove. 3. Turn the handle about Â¼ a turn anticlockwise and remove. 4. Take hold of the coarse/fine filter (1/2) by the handle with the hole and remove from the microfilter (3) 5. Clean all filters thoroughly under running water. 6. Remove the flat filter (4) from the base of the washing compartment and clean both faces thoroughly
7. Put the flat filter back in the base of the washing compartment 8. Place the coarse/fine filter in the microfilter and press together. 9. Put the filter combination in place and lock by turning the handle clockwise to the stop. During this process ensure that the flat filter does not protrude above the base of the washing compartment.
The dishwasher must not be used without filters under any circumstances.