Adjusting Huck brakes can be a frustrating chore. Each shoe has its own adjustment, so you're going to repeat the process 8 times before you're done. I believe the procedure is to tighten the shoe firmly against the drum, and then back off until the wheel turns freely, but don't overdo it. A low or no pedal situation when there's not any air in the system means that the full stroke of the master cylinder is being used up just to get the shoes into contact with the drums. As long as even one shoe has room to move, none of the otherws will apply any force to the drums. The closer you can get the shoes toi the drums without creating a constant drag situation, the more pedal height you'll have. It's a constant balancing act between pedal travel and not making the brakes drag. Huck brakes also have to "wear-in" until there's full contact between the linings and the drums, so you might have to do repeated adjustments after getting the brakes relined.
Jerry

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