introduced in 1989, was developed when cargo trailer manufacturers needed a solution that was safer and easier to operate than the traditional roll up and wing doors that were commonly... used. Our Ramp-Heister set the standard in the spring assembly industry. We never anticipated how much the Cargo Trailer Industry would grow - increasing the demand... for and success of our products. Cargo Systems became the leader by setting safe, efficient operating standards for cargo trailer door operation. It's a standard we maintain today. Today, Cargo...

, smooth operation. Cargo Systems recommends our spring assemblies only be installed, adjusted or modified by the original trailer manufacturer or an authorized dealer. Under... no circumstances should the end user attempt to modify, adjust or replace a torsion spring assembly. Cargo Systems, Inc. works closely with trailer manufacturers to insure the quality... and safety of the Ramp-Heister Spring Assembly. If there is a problem, Cargo Systems recommends that the trailer manufacturer contact us directly to make a determination...

, proper operation so spring is not over stressed. Cargo Systems is a member of the National Association of Trailer Manufacturers (NATM). InstallationSafetyWarranty ...Spring Tension Chart Spring Tension Chart InstallationSafetyWarranty This tension chart has been developed by Cargo Systems, Inc. and only applies to Cargo Systems and Ramp...-Heister spring assemblies. ASK FOR THE ORIGINAL, CONTACT CARGO SYSTEMS AT: (574) 264-1600. We will advise you on proper placement of cable anchor bracket and number of turns for safe...

Cargo Systems - Cargo Door Spring Assembly Systems Cargo Systems knows one size does not fit all. We design our systems to fit trailer manufacturer's specifications. We recommend... the right spring assembly system for safe, smooth, easy operation of your cargo door every time. We're serious about safety. Based on our knowledge and expertise, we advise you on proper spring tension for efficient and safe operation. ...