I had a cracked fuel pump input. I bought a new fuel pump, and like a Numbnuts I tried to just swap the input and fuel filter. Unfortunately, i took all the screws out and lost that pain in the butt little spring. DO NOT TAKE THE PUMP APART.
I think the takeaway from this is to know what you are taking apart. Don't just jump willy nilly into it. A lot of those pumps get rebuilt just need to be aware of what's in it. Google has many parts breakdowns for those pumps.
909, I lost the old one too. I was having extreme problems holding everything together. I thought I had a hold on an extremely angry cat. It didn't scratch though
Easiest way to build those pumps, is put 2 screws in a vice long enough to go through the unthreaded part. Build the pump on those 2 screws and stack it like a sandwich.
Folks, I just posted the original for a warning. I didn't mean to start a verbal war. Anyway, that fuel pump (Repop) has more layers than a birthday cake.