I checked my diecast pumps and found they had the same end play too so I figured that was the case. I'll be interested to see what keeps the gear from floating around when it's installed.
I got the E100 pump body apart. It took some soaking and heat but I am pleased that the other side doesn’t look too bad. I had a couple of surprises when I cleaned up the rotors with some Scotchbrite. The first one was how nice they cleaned up. They look better than some of the others. And unfortunately I didn’t notice this until I had the rotors cleaned but none of them have punch marks! So I have lost how they were oriented in the body.
I have everything apart on all three pumps except I haven’t been able to get the check valves out of two of them. Hopefully with more soaking and some heat they will come loose. I did get the seals out though. My method is to remove the rubber part and drill a 1/16” diameter hold on each side of the remaining seal housing. Not through, just enough to get something to hook on.
Then I have an old center punch that I ground a little flat on one side. I put the shaft in the pump and push the point of the center punch in the hole and taking care not to touch the mating surfaces, I gently lift the body and tap it on the bench so the end of the shaft hits the center punch. A couple of taps is all it took. Two of the seals came out without moving to the other side. The whole process took me less than fifteen minutes.
I cleaned everything up and even the bores on the E100 body look good. I checked the rotor clearances and all three were in spec. The gear shaft on E100 is badly pitted and some of the covers have some good gouges but everything else looks pretty good. If I can get the check valve out of one of the other bases I think I can come up with two decent pumps.