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The hydraulic puller is a new ideal tool to replace the traditional puller. It has the characteristics of compact structure, flexible use, convenient carrying and operation, less labour-saving, and less restricted by the site. It is suitable for various maintenance sites.1. Tighten the oil return valve stem in a clockwise direction before use2. Adjust the jaw seat to the jaw hook to grab the object being pulled.3. Tilt the piston starting rod back and forth to move forward steadily, and the jaw hooks back accordingly to pull out the pulled object.4. If the extension distance of the piston starting rod is required to be greater than the effective distance of the hydraulic puller piston starting rod during use, you need to stop when the extension distance is connected to the maximum effective distance, loosen the oil return valve rod, and allow the piston starting rod to retract and adjust After finishing, repeat steps 1-3 again until it is pulled out.5. To loosen the oil return valve stem, just slightly loosen the oil return valve counterclockwise. The piston starting rod gradually retracts under the action of the spring.