How am I supposed to inspect these brakes on the pre-trip?(pics inside)

That little oval hole in the backing plate is the inspection hole. You should be able to see the brake pad and drum clearance with a flashlight. In my day, most of those backing plates fell off.

 

Those plates don't stay on the truck too long around me. It's such a shame. You follow me?

 

We used to call those dust covers. But whatever the technical name is. Good advice on posts so far there Vinny. Suprised to see those. I purchased a new 1981 cabover in 1982 and it came from the factory without " dust covers". Don't know about new ones nowdays.

 

The hold up pretty good these days.

My truck drop has em. So far they're the only thing on the truck NOT falling apart.

 

Carry a small led flashlight in your pocket..to do your brake inspection etc. Bet examiners never saw that before. Good luck.

 

Did u go to school they give u a pre trip sheet to study use it other than that securely mounted not crack or broken no heat cracks on drums and linings are not crack or broken no dirt oil or grease and no less then 1/ 4vinch lining on the pad um look at videos on YouTube will help

 

Right onto the scrap pile...

 

Penske truck?