Levelling Valve: Faults, Replacement & Maintenance Guide
An air-suspended truck or trailer sitting low on one side or not holding ride height points to the levelling valve lever setting: diagnosis and replacement.
Suspension
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Articles
ECAS Solenoid Valve: Faults, Replacement & Maintenance Guide
A truck sitting low on one side or a trailer that will not settle to ride height points to the ECAS solenoid valve block: diagnosis, replacement and calibration.
Heavy-Duty Air Suspension Failures: Air Springs, Leveling Valves and ECAS
Heavy-duty air suspension explained: air springs, leveling valve vs ECAS faults, leak diagnosis, and maintenance for trucks, trailers and buses.
What Is a Shock Absorber? Bushing, Failure Symptoms, and Service Life
What is a shock absorber? Heavy-duty bushing wear, failure symptoms, field tests, the pair-replacement rule, and realistic service life.
