fuel pump problem.. won't prime for some reason, Dr 914/George could you verify markings on China pumps please Options

[tod914]

Put in a nos bosch 3 port pump in my car after changing all the fuel lines. There is gas in both the feed and return line from the firewall to the pump.. no kinked lines there. I checked and checked my fuel line configuration. All seems good..
fat line from fire wall to step hose to filter to S / top of the pump. D line to feed into engine bay. R has the 2 return lines and the bottom of the pump. Now the pump has the correct bosch numbers on it, but does not have the S D R on it. I would think it's the same as my old pump even though it's not marked like that. fuel routing in the engine bay is fine. been over that several times. the pump turns on fine when I turn the key 1/2 way. I tried that like 30 times to try to get pressure to build up. nadda.. even tried pulling feed line in the engine bay to see if that helped. Even ran it directly from the battery for like 10 seconds like the instructions said.
Any suggestions on how to get this pump to prime/push fuel?

[avidfanjpl]

I have 2 3 port pumps - 1 Bosch in the car and a spare I got here. Thought I blew the Bosch, but I did not. Tested both last week. Both work fine.

BOSCH - it is hooked up as you show in your pic and it works.

Center hose goes back into the tank. S(upply) hose comes from tank with a filter inline pointing flow at the pump.

Hose from the engine does that triple t thing and hits the pump on the aluminum tip covered side opposite the S tip.

Think I got that right the second and third time I redid the hoses this spring.

Someone told me that the pumps do get stuck with that gate open but mine ran when on the test bench.

Hey, hit it with the right ball peen hammer, well, at least it sounds like a good idea.

Back in the 70's Fred Apgar told me that all it takes is the right hammer.

30 years later I still remember his smile, and I know he was right.

Someone here also told me these things can be taken apart and made to work again, but a NOS rebuild kit is hard to come by. I never saw one yet for sale anywhere.

J