ABS Brake System: How It Works, Warning Light and Faults
Learn how the ABS brake system works on heavy trucks, why the warning light comes on, how to diagnose sensor faults, and the correct replacement steps.
Brake System
- Articles
- 17
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- 12
Articles
Brake Chamber, Diaphragm & Hose: Faults, Replacement, Care
Learn how to spot a leaking brake chamber, measure push rod stroke, cage the power spring safely and replace the unit and hose without risk on heavy trucks.
Air Dryer Purge Valve: Faults, Replacement and Maintenance
How a truck air dryer purge valve works, spotting leak and freezing symptoms, safe step-by-step replacement and keeping the air brake system dry.
Brake Chamber: Fault Diagnosis, Replacement and Maintenance Guide
Learn what a brake chamber does, how to diagnose air leaks and stroke faults, replace it safely, and maintain it for reliable heavy-duty air brakes.
Emergency / Park-Release Valve: Faults, Replacement, Care
How the trailer park-release valve locks and releases spring brakes, why it sticks or leaks air, plus diagnosis, replacement steps and torque values.
Lift Axle Valve: Faults, Replacement and Maintenance Guide
Lift axle valve guide for trucks and trailers: how it works, fault symptoms, pressure diagnosis, step-by-step replacement and maintenance checkpoints.
EBS Modulator: Faults, Diagnosis, Replacement Guide
Technical guide to the EBS modulator on trucks and trailers: how it works, fault symptoms, diagnosis, replacement steps, torque values and maintenance tips.
Brake Dust Shield: Faults, Replacement & Maintenance Guide
On a truck, a rusted or bent brake dust shield rubbing the disc looks trivial, yet it shortens pad life and weakens wet braking: diagnosis, replacement, care.
Trailer Control Valve: Faults, Replacement & Maintenance Guide
How the trailer control valve (Anhangersteuerventil) works on heavy trucks, its failure symptoms, gauge diagnosis, replacement steps and OE maintenance tips.
Foot Brake Valve: Faults, Replacement & Maintenance Guide
Pedal free play or unbalanced braking on a heavy truck often traces to the dual-circuit foot brake valve: fault diagnosis, gauge testing and replacement.
Quick Release Valve (QRV): Faults, Replacement & Care
How a quick release valve (QRV) works on truck air brakes: fault symptoms, diagnosis, step-by-step replacement, torque values and maintenance tips.
Relay Valve & ABS Relay Valve: Faults, Replacement & Care
Heavy commercial vehicle relay valve and ABS relay valve guide: how it works, fault symptoms, diagnosis, replacement steps, torque values and maintenance tips.
