TM 10-3930-659-10 3-7.  CHECK AND FILL TRANSMISSION OIL. a.  Cold Check of Transmission Oil Level. (1) Start engine (see paragraph 2-11). (2) Turn and remove transmission oil level gage (1),  wipe  clean  with  rag  (Item  7,  Appendix D),   and   install   into   transmission   oil   level gage fill tube (2). (3)  Remove  transmission  oil  level  gage  (1).    Oil level  must  be  at  COLD  mark.    Install  and turn transmission oil level gage into transmission oil level gage fill tube (2). b.  Add Transmission Oil. (1) Turn and remove transmission oil level gage (1).  Add transmission oil as necessary and install transmission oil level gage (see LO 10-3930- 659-12). (2) Check transmission oil level. c. Hot Check of Transmission Oil Level. (1)  Start  engine  (see  paragraph  2-11),  engage  parking  brake  (7),  hold  service  brakes  (5),  and  lower  forks  to ground. (2) Position direction selector lever (3) in F (Forward) and speed range selector lever (6) In fourth position. (3) Operate engine at fast Idle for 30 seconds.  Reduce engine speed to a slow Idle and place direction selector lever  (3)  in  N  (Neutral)  for  15  seconds.    Repeat  this  step  until  transmission  oil  reaches  normal  operating temperature. (4) Push in neutral lock button (4). 3-12