商用與軍用飛行器、機動車配件、彈藥、甚至是樹木與植物，標準的牽引車將不能應付大型及重型的負載，每天Harlan設計與制造的牽引車工作在全球用以解決這個問題。Harlan的牽引車不是普通型的，如美國與澳洲的飛機場適用Harlan牽引車來推動飛行器與拖拉行李拖車，如通用、福特與克萊斯勒汽車制造制造商適用Harlan牽引車來運輸配件，美國政府適用數百輛Harlan的牽引車，軍隊可以將其用來運送物資及牽引戰機出飛機庫，美國國家航空和宇宙航行局也有適用，埃及空軍擁有250輛Harlan牽引車，并且其國家軍隊近期采購了18輛用于運送物資與彈藥。Harlan牽引車可以裝載柴油、電動與汽油發動機，及按照顧客的選擇進行裝載如安全帶、轉彎指示燈，甚至是空調駕駛室等設備。

Commercial and military aircraft, automobile parts, ammunition, even trees and plants. When it comes to moving the biggest and heaviest commercial loads, standard tractors just don't make the grade. Airplanes. Ammunition. Auto parts. They all have to be hauled somewhere. And every day, across the world, tractors designed and built at Harlan Corp. in Kansas City, Kan., are getting the job done. These are no ordinary tractors. Airlines such as American and Qantas use Harlan tractors to push aircraft and pull baggage trailers. Auto manufacturers such as General Motors, Ford and Chrysler use Harlan tractors to transport parts. A Las Vegas casino recently ordered a Harlan tractor to move large trees and plants in an atrium. The U.S. government uses hundreds of Harlan tractors. The military uses them to move supplies and nudge fighter planes out of their hangars and NASA uses them in its work, too. The Egyptian air force has 250 Harlan tractors, and the country's army recently purchased 18 for supplies and munitions. Harlan tractors can be fitted with diesel, electric or gasoline engines and fitted with other options ordered by customers - including seat belts, turn signals, even air-conditioned cabs.