Hendrickson Auxiliary Axle Systems says its Composilite RO lift-axle model is designed specifically for Class 8 roll-off vehicles. The 13,500-pound-capacity RO fixed-axle model fits flat to the frame to facilitate maximum clearance from cylinder beams, attachments and sliding components; scalloped hangers aid in the clearance around roll-off cylinders.
Composilite RO springs and parallelogram components are positioned inside the frame rails, retaining a compact 23.5-inch packing space, according to the company; beams are spaced inboard one-inch for additional clearance, and air spring plates mount to the inside of the frame rail.
The parallelogram design helps keep lift-axle beams parallel to facilitate proper wheel tracking and enhance tire life, while lift plates remain parallel to help extend air spring life. The stabilizer features a cover to help protect the stabilizing rod from dirt and debris throughout travel.
The Composilite RO fixed axle delivers 13 inches of travel and 10 inches of lift, and weighs in at 905 pounds, the company says. For more information, go to www.hendrickson-intl.com.