TM 9-2520-272-34&P 4-15 INSTALL OIL FILL TUBE ASSEMBLY (SHEET 10 OF 11) 5    Coat o-ring (13) with transmission oil. 6    Install  new  o-ring  (13)  on  elbow  (11).    Install  o- ring  (13)  until  it  seats  on  back  up  washer  on elbow (11). 7    Using your hands, in the direction of the bend in the  elbow  (11),  back  off  lock-nut  (17),  on  the elbow (11), as far as possible. 8    Inspect back up washer and o-ring (13) to insure the  back  up  washer  is  not  loose  and  the  o-ring (13)  and  back  up  washer  are  pushed  up,  in  the direction of the bend in the elbow (11) as far as possible. 9    Using  your  hands,  screw  elbow  (11)  and  o-ring (13)   into   the   adapter   (14)   until   the   back   up washer   makes   contact   with   the   adapter   (14). Light   wrenching   may   be   necessary   to   obtain seating of the backup washer. If necessary use a 1-1/16 wrench for this purpose. CAUTION: For   alignment   of   oil   level   tube   assembly   and elbow, elbow is to be unscrewed by the required amount.  Do not align by turning elbow in a 10 To  align  the  elbow  (11)  with  the  oil  level  tube assembly     (2),     unscrew     elbow     (11)     by     the required  amount,  but  not  by  more  than  one  full turn.      Light   wrenching   may   be   necessary   to obtain    seating    of    the    backup    washer.        If necessary use a 1-1/16 wrench for this purpose. NOTE: Should  repair  not  include  installation  of  oil  level fill   tube,   position   the   elbow   pointing   towards center  of  the  LH  Output  Shaft.    Using  a  1-1/16 wrench  to  hold  elbow  and  a  1-1/4  crowfoot  and torque  wrench,  torque  nut  on  elbow  to  79  87  lb ft( 107118 N•m). 11    Using hands, install oil level fill tube (2) on elbow (11). 12    Using a 1-1/16 wrench to hold elbow (11) and a 1-1/4 crowfoot and torque wrench, torque nut on elbow to 79 87 lb ft(107 118 N•m). Go to Sheet 3. Para.  4-15, Task 4 Change 2 4-63.2