Frigidaire dishwasher won't drain

My dishwasher won’t drain. My husband attempted to fix it,but when he got to taking off the pump; he was afraid that he wouldn’t be able to put it back together. Do you have a diagram of how to take apart and put back together?:confused:

Here are your parts
Replacement parts for Frigidaire FDB1050REC1 Frigidaire/dishwasher | AppliancePartsPros.com

And here is a manual which should come in handy.
http://appliancejunk.com/forums/index.php?action=downloads;sa=view;down=244