If your brakes are new and the system has been bled, your next step is to see if you have a leak in any of your brake lines and also check your brake master cylinder to see if it's working or not.
They do. Every time you back up and step on the brake, it activates the self adjuster. It has it's limitations. If you don't know how to manually adjust your drum brakes, have your mechanic do it for you. If you feel your brake pedal is mushy or you have to push it almost to the floor, it may mean your rear drums need adjusting.
Caliper slides frozen? Rear drum brakes? May need to be adjusted
You either got the wrong master cylinder or you haven't actually bled all the air out of the system.
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No
you either need to bleed your brakes, add fluid or get a master cylinder darrellshandyman@live.com
It isn't almost always on the 4th floor.
try pumping up the brakes and see if that will give you a harder or higher pedal. sounds to me like you need to have the brakes bled properly to remove air from the system