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ZF Sachs Automotive of America yaw dampers provide long-lasting hunting control to allow increased operating speeds on freight cars and locomotives. The damping characteristic can be customized for any truck. The hydraulic design provides a clearly defined, consistent and long-lasting damping force compared to hunting control devices relying on mechanical friction, the company says. All dampers are equipped with multi-lip seals, super-finished piston-rods and low-friction guides, thus preventing leakage. Flexible internal gas chambers ensure immediate damper response and replace an external dome in most applications, the company says.