TM 55-1510-220-10 2-96.  INFLATING TIRES. Inflate tires as follows: 1. Inflate nose wheel tires to a pressure between 55 and 60 PSI. 2. Inflate  main  wheel  tires  to  a  pressure  between 73 and 77 PSI. 2-97.  SERVICING THE ELECTRIC TOILET. The   toilet   should   be   serviced   during   routine   ground maintenance  of  the  aircraft  following  any  usage.    It  is  more efficient  and  convenient  to  remove,  clean  and  recharge  the toilet tank on a regular basis rather than to wait until the tank is filled to capacity.  Instructions for servicing are provided on a   decal   applied   to   the   front   side   of   the   removable   tank. Instructions are as follows: a. Tank Removal. 1. Open    front    access    to    the    toilet,    as applicable, to remove the toilet tank. 2. Depress  the  lock-ring  of  the  flush  hose quick-disconnect coupling located on the right side at the front of the tank top. 3. Drain  any  residue  of  flush  fluid  in  the hose   by   partially   disengaging   the   plug from the quick disconnect and manipulating the hose to assist drainage. 4. Remove  the  flush  hose  from  the  quick disconnect and place hose in the retaining clip located on the underside of the toilet mounting plate. 5. Install   the   cap   attached   to   the   quick disconnect to seal the coupling. 6. Close the knife valve at the bottom of the toilet    bowl    by    pushing    the    actuator handle until the valve is fully closed. 7. Press  the  two  fasteners  on  each  side  of the   knife   valve   actuator   to   unlock   the tank. 8. Remove the tank by pulling the recessed carrying handle on the tank top. b. Tank Cleaning. 1. Dispose  of  tank  contents  by  holding  the tank  upside-down  over  a  sewer  or  toilet and pull the knife valve actuator handle, opening  the  valve  and  allowing  the  tank to drain. 2. Rinse   the   tank   by   filling   one-half   full with  water.    Close  the  knife  valve  and shake   vigorously.      Drain   tank   as   in previous step. NOTE Commercial detergents and disinfectants   can   be   included   in   the rinse water if desired.  However, do not include   these   materials   in   the   tank precharge. 3. Rinse and drain the tank several times to insure that the tank is thoroughly clean. 4. Wipe  the  exterior  surfaces  of  the  tank using a cloth moistened with clear water and disinfectant. c. Tank Precharge. CAUTION During    freezing    temperatures,    toilet shall be serviced with antifreeze solution to prevent damage. Charge  the  tank  with  a  mixture  of  water  and  chemical according to chemical manufacturer's specification. d. Tank Installation. 1. Install  the  tank  by  inserting  the  slides located  on  each  side  of  the  knife  valve into   the   slide   plate   assembly   on   the bottom  of  the  toilet  and  slide  tank  into place. 2. Press the two fasteners to the first detent to secure the tank. 3. Remove  the  cap  in  the  flush  hose  quick disconnect and connect the hose coupling to    the    quick    disconnect.        Lock    the disconnect lock ring. 4. Pull the knife valve actuator to fully open the valve. 5. Lift  the  toilet  seat  and  shroud  assembly from the top of the toilet and wipe with 2-85