How to inspect air disc brakes on a daily basis?

When you google it click on this its a PDF file.

 

The only thing I can add to this thread is that the pads run with a small amount of clearance
between them and the rotor. It varies by manufacturer but most are close to .020" to .050".
So if the brakes are properly adjusting then with the park brake released you should be able
to pry the caliper back and forth on the pins .020" to .050". If you can move the caliper more
than .060" then the brake is out of adjustment.

 

From the NSC

COMMERCIAL VEHICLE MAINTENANCE STANDARD and Electric Brakes
13. Disc Brake System Components
Note: Best practice is to measure and document brake pad friction material thickness and rotor thickness at
every comprehensive brake inspection.
a) The disc brake system components shall operate as intended and be free of defects and be inspected and
maintained as described in manufacturer service instructions.
b) When any inspection reveals evidence of a defect or abnormal condition, wheel disassembly is required to
determine the defect and to effect repairs, (i.e.: abnormal appearance, excess corrosion, damage, distortion,
glazing or shifting out of place of any brake component, abnormal wear of brake rotor or friction material,
signs of overheating, discoloration or contamination of brake friction material).
c) Every major brake inspection requires the brake friction material thickness and rotor thickness to be
measured and these measurements should be recorded on a record/report of inspection and be retained
(See Section 3 of PMVI standard to learn how these inspections and records can be used to avoid wheel
disassembly at every inspection).
d) No Mechanical or structural part shall be binding, broken, cracked, disconnected,loose,misaligned, missing,
seized, worn beyond OEM or industry standard.
e) No required brake component shall be inoperative or missing.
f) No disc (rotor) shall have a section that is broken or missing.
g) No disc (rotor) shall have any crack extending from the friction surface to the cooling vent, any surface crack
extending to an outer edge, groove or pitted area in rotor that reduces rotor thickness below OEM allowable
limit on the friction surface or have the friction surface contaminated by brake fluid, grease or oil.
h) No disc (rotor) shall have a thickness at any point across the friction surface that is less than the minimum
indicated on the brake rotor,OEM or industry standard, and no combination of machining orwearto
the disc(rotor) shallresultin a dimension that is less than the dimension stamped on the discorthe
manufacturer’s specification.
i) Nocaliper,pad retainer,slide pin/slider,orpadslider shallbeabnormallyworn, bent,binding,broken,
damaged,insecure,leaking, missing,mounted incorrectly or be seized. No boot or bellows shall be cracked,
damaged or missing.
j) No anchor plate or anchor plate fastener shall be loose or missing.
k) No pad shall be abnormally worn, broken, cracked, damaged, installed incorrectly, loose or have the friction
material contaminated by brake fluid, oil or grease.
l) Nopad(friction material) thickness measured at the thinnest point shall be less than manufacture
specification or industry standard or if limit not available for bonded friction material less than 3 mm and
for riveted friction material less than 5 mm.
m)The clearance between pads and rotor(caliper adjustment) shall meet manufacturer specifications.
n) All disc brakes components shall be adjusted within OEM standard,(e.g. torque values)