While railroads are generally considered durable, the problem is that any repair typically requires powerful repair equipment. The railroad jack made it possible to raise a loaded boxcar and repair a broken spring or wheel bearing on the road. Typically carried in the locomotive and the caboose, the railroad jack was considered a valued item to the crew.

The railroad jack became of particular fancy to persons in the house-moving and barn-repair businesses. The jacks were able to lift a house off of its foundation and hold it suspended while a trailer was backed underneath it. The jacks were also strong and powerful enough to raise sagging barns by lifting the main beams up and allowing concrete foundations to be poured underneath them. For extreme duty, there were special models of the jack that were hydraulically operated and could lift incredible amounts of weight.

The power of the jack makes it useful for derailments and accident scenes. The jack is able to raise objects that are very close to the ground by utilizing its toe. Often, the jack is laid on its side and rested against a strong object while a chain is looped around the toe of the jack. The jack is then pumped horizontally and used to pull bends out of steel beams and chassis off broken rail cars. When placed at an angle behind a railroad car and wedged against a rail tie, the jack could be used to move a car away from another or used to push two cars together for coupling them.