Early Fuel Pump

[1962fj40]

I decided to post a seperate thread because I'm eventually wanting to rebuild my existing pump, but needed clarification on the intrrnal workings. I see 2 diaphragms, 1 rubber boot and two check valves pressed in the body. I'm guessing the check valves keep fuel from going back the wrong direction during the pump actions? Is there anyway to test these valves? Do they need replaced normally?

Here are some pics if mine disassembled.

 

[1962fj40]

More pics

 

[Splangy]

In my experience, the check valves get gummed up with debris and varnish, making them less effective. A good cleaning will normally get them working well. Sometimes this is all it takes to get one of these pumps working like new again.