5-15 tons track jack 1.working methods:manual operation 2.weight : ... widely use 5-15tons track jack1. model max lifting max hooking jack-up height jack-up feet high hook QD5 5tons ... axle railway bridge installation, and vehicles, equipment, heavy lifting with, the structure is simple, easy to use, safe and ... and down swinging the claw, with the tooth claw, promote the linkage with rack up or down, and ...