The way to adjust drums is to adjust them up until you can NOT turn the wheel. This "seats" the shoes in place. Then back off and count the "clicks." When the drum is "just scraping" it's probably about right. Try to do the other wheels the same way, then test drive, jack it back up and see if they still "scrape" when spun. If not, tighten em up a couple/ three clicks.
You should NOT have to pump drum brakes, to get a good solid pedal.
