TM 10-3930-659-34 4-56.  STEERING CYLINDER REPAIR (Con’t). 7. new seal (17), new  wear  ring  (18),  new  seal  (19),  new  backup  ring  (16),  new  preformed  packing  (15),  and  new seal (14) into guide (3). 8. a light coat of lubricating oil to guide (3) and slide guide on piston rod (4). 9. Install new expander seal (9) in seal groove of piston (8). 10. Install two new backup rings (10) with curved portion toward expander seal (9) and new cap seal (11) on piston (8). 11. Install new wear ring (12) on piston (8). 4-212