TM 10-3930-659-20 17-31.    HYDRAULIC OIL RETURN FILTER ASSEMBLY REPLACEMENT (Con't). b. FILTER HEAD REMOVAL NOTE All   hoses   should   be   tagged   before   removal.      Refer   to   paragraph   2-18   for   tagging instructions. 1. Remove hydraulic oil return filter element (see subparagraph a). 2. Remove hose (15) and preformed packing (14) from adapter (13).  Discard preformed packing. 3. Remove  adapter  (13)  and  preformed  packing  (12)  from  hydraulic  oil  return  filter  head  (2).   Discard  preformed packing. 4. Remove hose (9) and preformed packing (8) from adapter (7).  Discard preformed packing. 5. Remove  adapter  (7)  and  preformed  packing  (6)  from  hydraulic  oil  return  filter  head  (2).    Discard  preformed packing. TA707677 17-94