How to adjust 8-3/4" axle bearing preload?

to check the end play, you basically first hammer the axle in as far as you can on the right (adjuster) side. Hook up your dial indicator so its reading the "in and out" movement of the axle shaft. Then pull the axle toward you lightly and read the measurement. that is your end play. Keep tightening it up after that until you get within spec. once your done, install the lock.