TM   9-2320-363-10 1.   M915A2   FRONT   AXLE   WHEEL BEARINGS. Daily, check that level of gear  lubricating  oil  is  visible  in  sight glass. If oil is not visible, remove rub- ber plug and add GO until level is even with  plug  opening.  Install  rubber  plug. 2.   POWER   STEERING   RESER- VOIR.  Daily, with engine running and fluid  at  operating  temperature,  remove dipstick  from  reservoir  and  check  level of lubricating oil on dipstick. Add OE/ HDO  to  bring  level  above  the  ADD mark  on  dipstick. 3.   FIFTH   WHEEL   (ALL   EXCEPT M917A1 AND M917A1 W/MCS). Dry cleaning solvent, P-D-680, is toxic and flammable. Always wear   protective   goggles   and gloves,  and  use  only  in  a well-ventilated  area.  Avoid  con- tact   with   skin,   eyes,   and clothes,  and  DO  NOT  breathe vapors.  DO  NOT  use  near  open flame  or  excessive  heat.  The solvent’s flash point is 100°F-138°F (38°C-59°C). If you become   dizzy   while   using cleaning   solvent,   immediately get fresh air and medical help. If solvent contacts eyes, imme- diately wash your eyes and get medical  aid. Weekly or on-condition, apply GAA to top  plate,  latch  mechanism,  slider  rails, locking  plungers,  and  all  lubrication  fit- tings.   Clean   and   lubricate   moving parts  on  underside  with  dry  cleaning solvent  and  OE/HDO. 4.   RADIATOR. Let  radiator  cool  before  remov- ing   cap.   Remove   cap   in   two steps.   First   place   thick   cloth over  cap  and  slowly  turn  cap left to its first stop; pause, and allow pressure to escape from cooling system. Then turn cap further   left   until   you   can remove it. Failure to follow this procedure  can  result  In  serious burns. Daily, with engine cool, remove radia- tor cap. Check level of coolant in radia- tor.  Coolant  must  be  within  2  1/2  in. (6.4  cm)  below  filler  neck.  Add  coolant to  correct  level.  Install  radiator  cap. 5.   ENGINE   CRANKCASE.   Daily, check level of lubricating oil. Wait 10 minutes after shutting down engine to allow oil to drain back into crankcase. To ensure an accurate reading, vehi- cle  must  be  parked  on  level  ground. Safe operating level is between ADD and  FULL  marks  on  dipstick.  As required,  add  OE/HDO  through  filler opening.  DO  NOT  overfill. 6.   TRANSMISSION. COLD   OIL   CHECK   (COLD   RUN BAND). Run engine for one minute at 1000  rpm  to  charge  the  system.  Idle engine   until   transmission   reaches 60°-120°F   (16°-49°C).   With   engine idling and transmission in Neutral (N), remove dipstick from oil filler tube and check  oil  level.  Oil  registering  in  the COLD RUN band indicates a sufficient quantity  of  oil  to  safely  operate  the transmission   until   temperature reaches   160°-200°F   (71°-93°C).   When temperature   reaches   160°-200°F (71°-93°C),  a  hot  oil  check  must  be performed. F-16