An uncoupling device for railroad cars especially suited for hydraulically cushioned cars including those of the long travel cushioning type having the couplers mounted for cushion travels in response to buff and draft forces of up to about thirty inches of travel, in which the uncoupling device comprises a lever assembly including a handle member secured to the car body for providing the necessary pivotal movement to operate the coupler lock lifter, a coupler lock lifter member operably engaged with the coupler lock lifter, and a floating rectilinear housing telescopingly receiving rectilinear portions of each of said handle and lock lifter members. The lever assembly is shaped to be disposed below the path of movement of the interlock structure of type F couplers in the event of a passed coupler impact and yet be balanced against rocking tendencies due to train action without requiring mechanical restraint. The lever assembly also accommodates the maximum buff, draft and side swinging of the coupler without going solid.