商用与军用飞行器、机动车配件、弹药、甚至是树木与植物，标准的牵引车将不能应付大型及重型的负载，每天Harlan设计与制造的牵引车工作在全球用以解决这个问题。Harlan的牵引车不是普通型的，如美国与澳洲的飞机场适用Harlan牵引车来推动飞行器与拖拉行李拖车，如通用、福特与克莱斯勒汽车制造制造商适用Harlan牵引车来运输配件，美国政府适用数百辆Harlan的牵引车，军队可以将其用来运送物资及牵引战机出飞机库，美国国家航空和宇宙航行局也有适用，埃及空军拥有250辆Harlan牵引车，并且其国家军队近期采购了18辆用于运送物资与弹药。Harlan牵引车可以装载柴油、电动与汽油发动机，及按照顾客的选择进行装载如安全带、转弯指示灯，甚至是空调驾驶室等设备。

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.