TM  10-3930-643-34 HYDRAULIC  SYSTEM  TROUBLESHOOTING  AND  MAINTENANCE. 12-18. Oscillation Cylinder (S/N 2001 and above). (Sheet 7 of 10) ASSEMBLY 24. 25. 26. 27. 28. 29. 30. 31. Coat rod (24) and inside of barrel (13) with clean hydraulic fluid. Coat new seals (23 and 22) and new wiper (21) with clean hydraulic fluid. Install new seals (23 and 22) on gland (20) using suitable seal installer,  if  necessary. Lip  on properly installed seal (22) faces inside cylinder assembly (11). Wiper (21) will be placed, as shown. Dip gland (20) in clean hydraulic fluid. Install gland (20) on rod (24). Coat  new  preformed  packing  (17),  new seal (16), new preformed packing (19) and new strip  (18)  with  clean hydraulic  fluid. Install new preformed packing (17), new  seal  (16),  new  preformed  packing (19) and new strip (18) on piston (15), using suitable seal expander, if necessary. Dip items 15 thru 19 as an assembly in clean hydraulic fluid and install on rod (24). Go to sheet 8 12-166