Air disc brakes

[REWB]

My trainers 2011 Freightliner Cascadia had a hybrid air/hydraulic disc brake system on the drives, this was back in 2015. We where out in California when the left rear axle started smoking on and off a bit, his annual inspection came up just a few days later, the shop found the whole system (after the air side) on that same axle was a mess and needed to be replaced.
I've been working on/around car's and light trucks since I was a teenager (30+ years) and even went to automotive tech school in the late 1980's but this was my first introduction to heavy truck repair. It did take 2 days just to get the part's and the final bill was well over 2K (US), it had +500K miles on it so I wasn't surprised buy the shape of the breaks and they put new pads on the rest of the drive's as well.
Improper toque and bad breaking techniques is the reason why you can get warped rotors, tighten those bolts right and at the right torque specs and if its hot outside when you come to a stop let your foot off the break and roll forward a bit to help disperse the heat.