TM 10-3930-643-34 STEERING TROUBLESHOOTING  AND  MAINTENANCE. 9-7. Steering Circuit Relief Valve. (Sheet 6 of 7) INSTALLATION 20. Using 15/16" socket, socket wrench handle and torque wrench, install items 19 thru 2 as an assembly and new  preformed  packing  (1)  in  steering control valve. Tighten items 19 thru 2 to 75 lb-ft. ADJUSTMENT 21. 22. 23. 24. 25. Using a 5/8" socket and socket wrench handle,  remove  plug  (20)  and preformed  packing  (21). Discard preformed  packing  (21). Install pressure gage. Operate and observe at what pressure valve releases. Valve should open at 3500 psi. Using an 11/16" socket and socket wrench handle, remove nut (2) and new preformed  packing  (3),  if  necessary. Using an 11/16"   open end wrench and flat tip screwdriver, loosen nut (4) while holding screw (6). Go to sheet  7 9-57