Brake Adjustment

Is there an adjustment for the brakes?  The backing plate has 2 inspection ports, but I can't see a ratchet disc for adjustment.  One drum drags a little and the other side shoes just barely touch.  I'd like to even them up while I have the wheels off for new tires.  BTW, the drums and lugs look very nearly new, like the wheels have never been off before.  I sure would like to know the history of this trailer and talk to the previous owner.      

The first time I found it difficult to understand how to adjust the brakes until after I pulled the wheels and looked at how the latching lever for the self adjusters works. Then it became clear. It’s very easy to tighten and difficult to back the brakes off, both because the latch has to be pushed aside and because the star points are designed to engage the latch not to back off the brakes. Frankly I’d prefer good old fashioned manual adjusters.

When you pull off your brake drum to do the adjusting, do you replace the seal every time?

SH, I do not. I inspect them. I have replaced mine yet and neither is leaking. I'm proficcent with tool as I have used it for many years and this past winter I did a brake inspection all is good.