USING SHOP AIR FOR BRAKE INSPECTION?

Yes it is, The only difference would be your not doing a leak down test on the air system for the truck. On second thought you can even do that if attach a gauge to it to check for air loss on the system.

 

If you are doing a DOT inspection, No.

 

Depends on what shop air is.
If it's like 160 or some crazy PSI like I have, not good, you'll break something.

 

It's cheating. Put that airhose down lolz.

You really don't know what sort of monster shop machine is feeding it. You would break something somewhere me thinks. I remember shops capable of moving enough PSI to turn over steam engines.

 

No it would cause #### to blow up.

 

Possibly.
When you dig it out of the 6 inches of asphalt it was blown into,
measure it, and compare the results against length of a new one.

 

This is the correct answer and anybody that says otherwise is confused. IMO.

 

For measuring brake chamber stroke? Shop air shouldn’t be more than 120 psi (you can verify your shop’s air pressure with even a simple tire pressure gauge, but you might have to rig up a fittting to make it work.
I can see where it would be useful for checking brake stroke for something which isn’t a DOT inspection, but I’d go through the quick release or relay valve (whichever one it uses), rather than directly to the chamber. You take a simple trigger actuated air blower and make it work.