Detergent Cup Shaft and Lever

Completely remove the door from the dishwasher - It's easier to work on this way.

First the spring tension is NOT that critical - the spring just needs to not be mangled and really out of shape. Unless someone has taken a pair of pliers to it, it should be o-k
to use. I even mangled up the slot in the lever with a pair of pliers to try and jeery-rig it and it still works fine - you MUST at least have some resemblance of a groove here for the spring to
catch.
1) hook the hook on the inside of the lever where the slanted groove is on the cam. (see your great diagram)

Put all the pieces together at this point, shaft,spring and lever

2) There are two sets of grooves that correspond to matching notches in both the lever and the dispenser shaft. Make sure these match up to one another.
3) Using a pair of hemostats or tiny pliers pull the other side of the spring clockwise - gently - until you can hook it on the stop that is on the inside door. There will be some
tension of the spring around the shaft to cause the hook to engage to the slot in the plastic lever.

[*]This is where MOST of my problems were at:

4) Test the dispenser door to make sure when you close it, it springs back up. It WILL NOT hold when the door is off.
[*][I was trying to get the dispenser door to stay shut while the door was removed from the washer - this will NOT happen]
5) If number four is happening above, attach the door to the dishwasher.

Very Important: The door will only stay closed when the dishwasher is in the OFF position. Otherwise it will spring open when you try to shut it, because it is suppose to because at this time
in the cycle the detergent would be dispensing - hence the door being OPEN and the door not latching.

Replaced all ordered parts.

I ordered parts before opening. My theory was to have the parts so that the dishwasher was not apart for longer than necessary, in the hope of avoiding the wrath of momma bear who just wants a new one... Once I opened up the door I realized the spring for the main lever arm had broken its mount. I drilled a new hole and reattached the spring. I did not need any parts. However, the original parts corresponding to the three parts I ordered were all beat up and brittle, so I was happy to replace anyway. I did not even explain, she is happy the cup looks new and is happy with the dishwasher. It even says Cascade on it, almost like an upgrade :). If your cup does not latch I would order the three parts I did and also order the lever spring. It was very corroded after 30 years, so I would have replaced if I purchased it. Next time.. :)

pretty easy, take off 7 screws from inside door

only hard part was getting arm to click into lever through the door. if you practice with the parts outside the door they lock together really well :)