Been awhile since I have played with the brakes on my old truck, but did quite a bit years back. The only adjustments were on the brake lever (cab) side. There was a metal rod/yoke type deal that was threaded that attached to the lever (under the cab). That goes to a bar that has 2 ears on it that goes to the cables that goes to the rear end. You could take slack up there to so the lever system inside the drum "just" touches the shoes. Same idea as adjusting the pads to the drums. This is how I did mine. If you've already used up all the threads on the rod you could try clamping the cable to the rod with vice grips or something of the sort to see if your travel is good.
Last edited by subsporter; 06/18/2017 12:38 AM.