Here are your parts
Replacement parts for WHIRLPOOL KUDS01FLSS6 UNDERCOUNTER DISHWASHER | AppliancePartsPros.com
Click on the picture of the part and a new page will open with Q&A help.
The following should also help.
KitchenAid KD-01 Stainless Steel Dishwasher 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.