TM 10-3930-643-34 HYDRAULIC  SYSTEM  TROUBLESHOOTING  AND  MAINTENANCE.  (cont) 12-17. Oscillation Cylinder (S/N 2000 and below). (Sheet 4 of 8) DISASSEMBLY  (cont) 12. 13. 14. 15. 16. 17. 18. 19. Using a 14"   adjustable  wrench,  remove nut (14). Remove items 15 thru 19 as an assembly from rod (21). Using a scribe, remove and discard bearing (16), seal (17), two rings (18) and preformed packing (19) from piston (15). Pull rod (21) through parts remaining on rod (21) to facilitate removal of retainer  bearing  (20). Remove and discard retainer bearing (20). Remove  and  discard  preformed  packing (22), ring (23), two seals (24), wiper ring (25),   ring (26) and seal (27) . Remove  retainer  (13). Using a 5/16"   socket and socket wrench  handle,   remove  two  fittings (28) from pins (10). Go to sheet 5 12-155

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