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Agree Gregory. Double flared brass fittings are readily available to screw a hydraulic pressure guage to the convertable's hydraulic pump for a 5 second test looking for 300 p.s.i. output when 12v is jumped to the pump. ( Of course cap the line removed from the pump for this test!) We have found the deck and top hydraulic pistons , both deck solonoids and the top solonoid are full of trash. We just finished flushing 2 dozen pistons. Unbelievable , the chunks of black trash that came out of them. We cut open one solonoid to discover the innards were rusted and would not open to let fluid pressure pass to the deck pistons. Of course all this stuff and indeed all parts of the top mechanism should be cleaned , repaired/replaced and bench checked during a decent restoration .
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