This innovative product is a mechanical twin gearbox system operating entirely from the ground, at the bottom corner of the rail car. The assembly of this system includes robust and durable components and is a remarkably efficient and easy to operate product. This system is highly appreciated by its users. It quickly became the most popular system, with no equivalent on the market. Your tarp will have never been so easy to operate Elcargo. Specific designed parts are a must for the ease and safety of operation.

Mechanized Twin Gearbox System 421


Like all ElCargo’s mechanical tarp systems, the 521-EM can be fitted to almost any flatbed. It offers the same benefits as all of ElCargo’s systems: water tightness, the toughness of their anchoring hooks, easy and quick to operate. Versatile, they can handle any type of bulk transportation including sand, grain, hazmat, etc. ElCargo systems protect your cargo from bad weather, while also protecting the environment.


  • Twin Gearbox System
  • Stainless steel robust lock mechanism
  • Innovative central mechanism assembly
  • External tensionner in the front
  • Internal tensionner at the rear
  • Aluminum winding, center and anchoring tube
  • Steel bulkhead available in heights from 10′ to 16′
  • Steel central and rear robust steel bow
  • Waterproof
  • Easy anchoring, no need for straps
  • Adaptable system
  • Weatherproof cargo protection
  • Freedom and autonomy of loading cargo
  • Fuel saving by as much as 14.93%
  • 3-year warranty against all manufacturing defects
  • 21-ounce vinyl tarp and built-in reinforcement at contact point increase life
  • Complete color line

tarp colors
REF 1050
REF 1052
REF 1055
REF 1059
REF 1063
REF 1065
REF 1066
REF 1072
REF 1075
REF 8284