Brakes are the system most likely to put your truck out of service — and it's almost always slow wear, not a sudden failure. Air brake maintenance software built around the Bendix and WABCO systems on your fleet catches the defect at inspection, turns it into a work order, and keeps the repair on record. Fewer roadside surprises, a cleaner CSA trail.
Your brakes are the #1 reason trucks get parked at the scale house
Track Bendix and WABCO air brake inspections, catch mechanical and ABS defects early, schedule PM before adjustment slips, and document every repair.
You know the feeling — a truck passed its last PM, then gets flagged for brakes out of adjustment at a random roadside check, and now a load is sitting while you scramble for a repair. Brake-out-of-adjustment under 49 CFR 393.47 is one of the most-cited vehicle violations in FMCSA data, and the FMCSA Large Truck Crash Causation Study coded brake problems as a factor in roughly 29% of large-truck crashes. The gap is almost never a mystery — it's wear that nobody tracked between PM cycles. That's what usage-based preventive maintenance closes, and you can book a demo to see it set up for your Bendix and WABCO trucks.
Where air brakes actually failtwo sides of the same system — mechanical wear and electronic faults
A modern air brake system fails in two very different ways, and they need two different kinds of tracking. The foundation side wears mechanically; the Bendix or WABCO ABS side throws electronic faults. Lump them together and you'll keep missing one. Here's how each breaks — and what the warning sign means.
Foundation & air system
- Pushrod stroke too longOut of adjustment — the single most common roadside brake citation under 393.47
- Audible air leak at chamber or valveCracked diaphragm, worn valve or loose fitting — an OOS trigger
- Thin or contaminated liningsNormal wear, or oil/grease contamination on the friction surface
- Auto-slack not compensatingFailing automatic adjuster — a violation under 393.53(b)
ABS & electronic control
- ABS lamp on, stored faultWheel-speed sensor wiring corrosion — the most common ABS fault on Bendix EC/EB-80
- Intermittent ABS at low speedTone-ring damage or a sensor gap throwing C0036 / C0041 / C0046 codes
- Harsh or sticking ABS actionSticking modulator valve, common on higher-mileage controllers
- ECU no-communicationPower, ground or harness fault at the Bendix/WABCO control unit
Track foundation and ABS defects as two histories in connected maintenance management and the repeat wheel-ends and recurring DTCs surface fast — so you fix the corroded sensor harness once instead of clearing the same code every month. Book a demo to see brake defect history per wheel end
This is what a brake violation actually coststhe enforcement reality behind air brake maintenance
Brake Safety Week makes the stakes concrete. These are the numbers that should drive your air brake maintenance program — not as trivia, but as the cost of letting wear go untracked.
A truck pulled out of service for brakes isn't just a fine — it's a stranded load, a tow, and a CSA hit in the Vehicle Maintenance BASIC that follows your carrier. You can start free and log your first brake defect today to see where your violations cluster.
What the inspector measures, the software tracksturn the CVSA checklist into a standing digital record
A CVSA-certified inspector works through a fixed list — pushrod stroke, linings, air loss, the ABS lamp. The problem with paper is that you only find out you failed when they do. Here's the same list, mapped to what your digital brake inspection captures and keeps.
When the measurement lives in the system instead of on a clipboard, you catch the wheel end drifting toward the limit weeks before it's a violation. Book a demo to see pushrod stroke trended per wheel end
From caught to provenhow one brake defect moves through the maintenance software
Flagged at inspection
Long pushrod stroke, an air leak, an ABS lamp — marked with a photo on the digital inspection, not a lost paper slip.
Auto work order
The defect becomes a work order instantly — assigned, prioritized, with the wheel end's history attached.
Right part pulled
Chamber, lining kit or sensor comes from parts inventory; the fix is logged and stock updates.
Documented proof
The closed work order becomes a timestamped record — your CSA and audit trail, in analytics and reporting.
That's the difference between a fleet that keeps re-clearing the same ABS code and one that closes the loop for good. Book a demo to walk a real brake defect through it
The air brake PM checklistthe recurring check that keeps trucks off the OOS list
Build this once as a preventive maintenance template, trigger it by meter or calendar, and it auto-assigns to every truck — each failed line becoming a trackable defect. For the full procedure, see the heavy vehicle brake inspection guide.
On paper, this is only as good as the last person who filed it. In HVI, every failed line becomes a tracked defect, a work order and a documented repair — automatically.
Build This Checklist Free in HVIFrom a maintenance manager who stopped re-clearing the same code
Our brake adjustment write-ups were killing our CSA score, and we had two trucks that kept throwing the same wheel-speed sensor code. The shop would clear it, it'd come back, nobody connected the dots because it was all on separate paper tickets.
Once every brake defect was a work order tied to the wheel end, the pattern was obvious — corroded sensor harnesses we kept resetting instead of replacing. We fixed the root cause on both trucks and our brake OOS rate dropped off a cliff the next quarter.
Frequently asked questions
What does air brake maintenance software actually do?
It lets technicians and drivers flag mechanical and ABS brake defects during digital inspections, turns each into a work order automatically, and schedules preventive maintenance by meter or calendar. The result is fewer out-of-service orders and a documented repair record per wheel end.
Does it work with Bendix and WABCO brake systems?
Yes. HVI tracks inspections, defects and repairs for the Bendix and WABCO air brake and ABS systems most fleets run, including recurring ECU fault codes and wheel-speed sensor issues, so you can see repeat faults by unit.
How does it help with brake-out-of-adjustment violations?
Pushrod stroke and lining wear are logged per wheel end and trended between inspections, so the system flags a wheel end drifting toward the limit before it becomes a 393.47 citation. PM is triggered on schedule, not after a roadside find.
How does the software help with CSA scores and audits?
Every closed work order becomes a timestamped, signed repair record tied to the truck. When a CSA review or audit comes, you have proof each brake defect was caught and repaired, instead of scattered paper tickets.
How long does it take to get set up in HVI?
Most fleets are live across their trucks in under two weeks, with no new hardware. You build the air brake inspection and PM checklist once, and it auto-assigns to every unit on schedule.
