Why Are My Trailer Air Brakes Locking Up?

Why Are My Trailer Air Brakes Locking Up? The most common causes are incorrect or malfunctioning relay valves. Other causes include air leaks, air system contamination, a front-axle-limiting valve and excessive use of the trolley valve. Timing imbalance occurs when some brakes receive air faster than others. What causes trailer air brakes to lock up? … Continue reading Why Are My Trailer Air Brakes Locking Up?