The oil cylinder is mounted on lifter to move the scraper blade device. Connecting frames (5) and (7) are mounted guide plate that is welding on front frame. The connecting frame can be turned when remove the control pin at the left side of instrument column. There are 3 holes that pins can insert into to prevent turning. Holes (d) and (c) are used to scrape the gradient to left or to right for scraper. Hole (e) is used more frequent than other holes. The sleeve (16) is used to adjust the clearance between pin and hole to make the clearance reach to minimum value (such clearance can increase the move of scraper to top and to bottom).
In additionally, the clearance between connecting frame and the guide plate that is welding on the frame can be adjusted with shim. 5. Lift Connecting Frame (Top) 6. Shim 7. Lift Connecting Frame (Bottom) 8. Ball Hinge Joint 9. Shim 10. Adjusting Bolt 11. Guide Frame 12. Shim 13. Shim 14. Guide Frame 15. Ball Hinge Joint 16. Sleeve 17. Pin 18. Bolt 20-123