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ASF-Keystone's new AAR-approved Spring Control Long Travel CCSB is heat and wear resistant for greater stability, less maintenance and longer life, the company says. The Spring Control CCSB is designed to improve the ride quality, curve negotiation and overall stability of rail cars, resulting in fuel savings and less wear. The spring control is designed to retain its preload longer than elastomeric bearings, resulting in less replacement or adjustment, the company says. Three models feature preloads of 5,600, 4,500 and 3,800 pounds.