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Automatic Lift Axle Control

Posted: February 18, 2015

Meritor WABCO’s SmartTrac portfolio of stability control systems has expanded with the addition of a new cost-saving technology to monitor suspension load and manage lift axles for trailers.

The SmartTrac automatic trailer lift-axle control system automatically raises or lowers the axle based on cargo weight. It helps reduce fuel costs, tire wear, vehicle downtime, and labor and maintenance costs while also increasing wheel-end and brake life, the company says.

The new product integrates with Meritor WABCO’s trailer roll stability support (RSS) and anti-lock braking systems (ABS), resulting in a more cost-effective solution compared to stand-alone lift axles requiring separate electronic control units, the company says. The system is fully automated, which means drivers no longer need to adjust the axle position manually. The system, which can control multiple trailer lift axles, is especially useful for fleets that frequently reduce load during multiple deliveries.

It’s also compatible with any air ride-equipped lift-axle suspension on a trailer and can be configured in several ways. Axles can be lowered automatically when the trailer is parked. A switch can be added to give drivers the ability to lower an axle manually. Pressure limits are user-defined to comply with local road laws.

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