TM 5-6115-593-12 TO 35C2-3-463-1 b.   Replacement.        Replace    defective    circuit breaker CB103 (42, figure 4-18) as follows: (1) Removal. a.   At  rear  of  panel,  tag  wire  leads and remove screws and washers  which  secure  leads  to the circuit breaker. b.   Remove circuit breaker mounting hardware (40 and 41) and remove circuit breaker. (2) Installation.        Install    circuit    breaker onto   panel   with   mounting   hardware (40 and 41).  Attach wires with screws and   washers.      Remove   tags   from wires. 4-30.    PANEL  MOUNTED  RECEPTACLES  J103  AND J104 THROUGH J109 (54, 7 and 15, figure 4-18). NOTE Defective   receptacles   may   be   replaced individually, as necessary. a.   Removal. (1) At   rear   of   panel,   tag   and   remove wires from receptacle J103 (54).  Tag and  unsolder  wires  from  receptacles J104 through J109 (7 and 15). (2) Remove    receptacle    J103    (54)    by removing     screws     (48),     nuts     (49), cover  (50),  gasket  (51),  screws  (52), and nuts (53). (3) To  remove  receptacles  J104  through J109  (7  and  15),  unscrew  dust  cover (3    or    12)    and    remove    mounting hardware (13 and 14). b.   Installation.      Install   receptacle   J103   (54) with   screws   (52),   and   nuts   (53).      Then position   gasket   (51)   and   cover   (50)   and secure   with   screws   (48)   and   nuts   (49). Resolder    wires    and    remove    wire    tags. Install receptacles J104 through J109 (7 and 15)  with  mounting  hardware  (13  and  14). Reconnect wires and then remove wire tags. 4-31.  SHORTING PLUG (4, figure 4-18) a. Test.  With an ohmmeter (Rx1 scale) check for   continuity   between   pins   A   and   B.      If meter   indicates   an   open   circuit,   replace short plug. b.   Replacement.  To remove shorting plug (4) remove screw (1) which attaches the chain, then   unscrew   the   shorting   plug   from   the receptacle. 4-32.  PANEL MOUNTED SWITCHES S22, S21, S106 and S20 (20, 26, 31, and 36, figure 4-18). a.   Test. (1)   Check switches for continuity in one direction  and  an  open  circuit  when operated in the other direction. (2)   At   rear   of   panel,   remove   one   lead from switch. (3)   With  an  ohmmeter  (Rx1  scale),  test switch  as  indicated  in  step  (1).    If switch fails to meet this test, replace switch. b.   Replacement    S22,    S21,    S106    and    S20. Replace defective switches (20, 26, 31, and 36, figure 4-18) as follows: (1) Removal. (a)   At  rear  of  panel,  tag  leads  and remove wires to switch. (b)   Remove switch mounting hardware   and   guards   (21   and 37) and remove switch. (2) Installation. (a) Install  switches  S21  and  S106 (26   and   31)   onto   front   panel with mounting hardware. (b)   Attach  wires  to  S21  and  S106 switches (26 and 31) and remove tags. (c)   Install   switches   S22   and   S20 (20 and 36) 4-56