Traction Frame and Lifter Traction frame is important equipment for supporting turning gear ring and scraper blade. When the ball joint (8) is worn, the shim (9) is used to adjust the clearance at connecting area to ensure the clearance is not too much. When rotate the guide frames (11) and (14) and make them contact with turning gear ring at (a) and (b) points. The shim (12) and (13) as well as adjusting bolt are used to adjust the clearance of connecting elements. 1. Traction Frame 2. Scraper Blade Lifting Oil Cylinder 3. Traction Frame Side Moving Oil Cylinder 4. Turning Gear Ring 20-122