Someone had asked me about the daily air brake tests we used to do on our fire engines which use similar (Meritor) brakes. I do this prior to every trip, but found it was a lot easier to perform when I was on a level concrete surface. <br/><br/>This is a pretty good link:<br/> How To Perform An Air Brake Test | FireFighterToolBox <br/><br/>Remember to use wheel chocks! The alternative is...