Whiting Corporation’s portable 25 ton specially modified portable electric jacks are based on the company’s MA locomotive jacks, which are used to hoist rail freight and passenger cars for building, maintenance and overhaul. The customized low-maintenance transportable jacks, each weighing about 3000lb, feature an effective lifting height of six feet with built-in safety and versatility features, including modified lifting brackets to suit the particular lift, front bearing pad extensions to enhance stability, connecting pins to interface with customer-supplied lifting components and upper over-travel limit switches.