There is a medel flap that attaches directly around that lever held in by a roll pin 95% of the time that flap is broke off or missing all together. Look at the release valves on top of the pump there is two little numbson top one on each valve. If they are pushed down flush with the valve they are stuck. Try using a good penetrating oil and squirt the heck out of them for a.week or so. If they don't pop up then I would start look into a replacement or if you know somebody close by with good working valves just swap them out and see how that works
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