Self-adjusting Drum Brakes

I'm not sure what your question is. If you are thinking of attempting to put Dexter brakes on Lippert axles, don't do it. The two are almost identical in design, but my guess is that mixing the two won't even work. Are you planning to replace everything, such as the backing plate and hub assemblies? I just dealt with Lippert on my Lippert axles and brakes and did all the work myself, so I learned a lot in the process. If not replacing the hub assemblies make sure you thoroughly clean and repack the bearings and replace the grease seals while you are in there.