Abstract: A hydraulic puller for removing an element from an axle, including a hydraulic pipe, a pawl assembly mounted on the hydraulic pipe and controlled to catch the element to be removed from an axle, a movable rod movable fastened to the hydraulic pipe, and an oil tank assembly connected to the hydraulic pipe by a connecting pipe. The oil tank assembly comprising an air permeable oil container filled with a hydraulic oil and covered by a casing, and the casing having two air holes at two opposite locations. The hydraulic puller further having a hand lever, a piston rod moved by the hand lever to force the hydraulic oil out of the oil container late the hydraulic pipe to move the movable rod out of the hydraulic pipe, and spring means fastened to the hydraulic pipe to automatically move the movable rod back to its former position.

Abstract: For removing a bearing or axle bushing from an axle, a hydraulic puller comprising a pawl assembly mounted on a hydraulic pipe, an oil container attached to the hydraulic pipe at the top, a movable rod movable fastened in the hydraulic pipe at the bottom, a piston rod controlled by a hand lever to squeeze a hydraulic oil out of the oil container for moving the movable rod, and a spring to automatically push the movable rod back to its original position. Repeatedly rotating the hand lever back and forth causes the movable rod to extend out of the hydraulic pipe, and therefore, the pawl assembly is forced to pull a bearing or axle bushing out of an axle.