TM 5-6115-593-12 TO 35C2-3-463-1 Section XXI.  MAINTENANCE OF FUEL TANK ASSEMBLY 4-54. GENERAL.    The  fuel  tank  assembly  (figure  4- 33)  is  located  at  the  rear  end  of  the  base  assembly, under  the  control  cubicle.    It  is  equipped  with  two  fuel level switches and one liquid level transmitter. a. Inspection of Fittings.  Inspect elbow fittings (1, 2, and 3) for leaks or obvious damage. b. Replacement  of  Fittings.    Remove  fittings (1, 2, and 3) and install new fittings using sealing compound (MIL-S-7916C). 4-55. FUEL LEVEL SWITCH. a. Test.  (See figures 4-33 and 4-34.) (1) Inspect   the   wires   to   the   switch   for secure connection. (2) Inspect   for   loose   terminals   or   other signs of damage. (3) Remove   connector   from   switch   (4, figure  4-33)  and  remove  switch  from fuel tank. (4) Connect ohmmeter (set on Rx1 scale) to  pins  A  and  B  (figure  4-34).    Move upper float to upper stop at top of the switch.    Ohmmeter  shall  show  open circuit   (no   continuity).      Move   upper float  down  to  lower  stop.  Ohmmeter shall show closed circuit (continuity). (5) Connect  ohmmeter  to  pins  C  and  D. Move     lower     float     to     upper     stop. Ohmmeter   shall   show   no   continuity. Move  lower  float  down  to  lower  stop. Ohmmeter shall show continuity. (6) Repeat test procedure (steps 3 through    5)    with    second    fuel    level switch. NOTE Switch part numbers are located on unit. (7) If   switches   are   defective,   replace them. b. Replacement. (1) Remove   connector   from   switch   and remove switch. (2) Install switch in the tank using sealant compound and attach connector. NOTE Both   fuel   level   switches   are   similar.      Be sure  to  install  in  proper  location  on  fuel tank. 4-56. LIQUID   QUANTITY   TRANSMITTER.   Remove liquid quantity transmitter in accordance with paragraph 4-56b prior to testing. a. Test.    Connect  ohmmeter  between  case  of transmitter and the transmitter connector pin as shown in figure 4-35.  With sensing arm of     transmitter     in     lowered     position     (A), ohmmeter shall read between 0.00 and 0.90 ohms and with sensing arm of transmitter in raised   position   (B),   ohmmeter   shall   read between  29.8  and  31.3  ohms.    Disconnect ohmmeter.  Reinstall transmitter. b. Replacement.    (See  figure  4-33.)  Tag  and disconnect wiring and remove transmitter by removing five screws (6) and transmitter (8), and  gasket  (7).    Install  transmitter  on  tank using    sealing    compound    (MIL-S-7916C). Reinstall gasket (7), transmitter (8), and five screws   (6).      Connect   wires   by   securely pushing pin on wire into connector receptacle. 4-90