[TR] Fuel pump check valves

[Andy]

I'm on the digest, and apologize if this has come up lately.
I bought a fuel pump rebuild kit, but when I disassembled the fuel pump, it
did not have the retainer and two screw. Apparently the check valves were
pressed into the pump.
The check valves with the kit are loose and do not stay in place. Has anyone
run up against this, and what was your solution solution?
TIA Andy