Here is a manual
Whirlpool Dishwasher KD-5 PowerClean Filter Module Service Manual - ApplianceDigest.com
You have to join the site to download the manual but it is free and this is a very good site for manuals and other info for the appliance repair DIYer.
Your unit is actually a Whirlpool and should be close to the above.
The site also has a KD-10 and a KD-11 which may have additional info.