Description
Hendrickson Model: SCST139‑XC
The SCST139‑XC is a Hendrickson COMPOSILITE® SC Steerable Auxiliary Lift Axle suspension, part of the SCST (Steerable Composilite Trailer/Truck) series. It is commonly used as a steerable lift axle on trucks and vocational applications to increase load capacity, improve maneuverability, and reduce tire wear when the axle is down.
General Specifications (SCST13 family)
Rated capacity: 13,000 lb
Type: Steerable auxiliary lift axle suspension
Suspension design: COMPOSILITE® composite beams with air springs
Axle position: Typically tag or pusher (depending on truck layout)
Steering: Self‑steering with mechanical stops and optional lock‑straight
Lift system: Air‑operated (manual or automatic controls available)
Applications: Dump trucks, mixers, refuse, vocational and on‑highway trucks
Common Components & Service Info
Air springs & upper air spring plates
Composite suspension beams
Steering knuckles & kingpins
Tie rods with toe adjustment
Mechanical steering stops
Lift springs & pivot bolt/bushing kits
Hendrickson provides detailed installation, preventive maintenance, torque specs, and replacement procedures in their COMPOSILITE® SC service literature.
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