Maytag Dishwasher Fill/Drain Hose

The fill/drain hose coupling will not stay attached under pressure. I have ensured that the faucet aerator is correct and allows for enough room for the coupling quick-disconnect.

The white gasket? inside the coupling came out, but I was able to reinsert it. It does look as if a piece is missing though.

So, my question is: can I replace just the coupling or do I have to replace the whole hose assembly?

If I must replace the hose assembly, where can I find instructions for accessing the hose hookups on the dishwasher?

Also, are there any cheaper options that I have not considered?

Thank you,
CBernard

Here are your parts
Replacement parts for MAYTAG MDC4650AWW0 PORTABLE DISHWASHER | AppliancePartsPros.com

Looks like you have to replace the entire hose/hookup (Item 3 in Section 7).
Click on it’s picture for more views/info.

The following should help with the install.
http://appliancedigest.com/index.php?/files/go/d07bb534c74f6c50bf1c08f2c22d7149/16026945-maytag-convertible-tall-tub-dishwasher-service-manual
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.