ARMY MARINE   CORPS A I R  F O R C E TM  5-6115-612-12 TM  6115-12/7 TO 35C2-3-471-1 NAVY AG-320B0-0MM-000 4-66.    EXHAUST  GAS  TEMPERATURE  THERMO- COUPLE.    (cont) a.  Test.    (cont) (4)   With   multimeter   set   on   R1, measure   resistance   across   EGT   thermo- couple     terminals. Resistance should be less   than   1   ohm. (5)    If    resistance reading   is greater  than  1  ohm,  or  if  an  open  cir- c  u  i  t   i  s indicated, replace EGT thermocouple  (paragraph  4-66b). (6)    Connect electrical con- nections  to  EGT  thermocouple. (7)   Install   engine   housing   access c  o  v  e  r s  e  c  u  r e w i th turnlock f a s t e n e r s . (8)    Connect    battery    cable    plug connector   to   battery. b. Removal. W  A  R  N  I  N G To prevent battery  is performing electrical components. (1)  Disconnect  battery  cable  plug connector   from   battery. injury, ensure  that disconnected before maintenance o n (2)  Loosen  turnlock  fasteners  and remove engine housing access cover. (3)  Tag  and  disconnect  electrical c o n n e c t i o ns f r om E  G T thermocouple terminals    (1,    figure    4-41). Larger terminal   is   negative   (-),   smaller   is positive   (+). (4)   Unscrew   mounting   collar   nut (2) and remove EGT thermocouple (3). c. Installation. (1) Coat mounting collar nut threads  with  antisieze  compound. (2) Install EGT thermocouple and tighten mounting collar nut (2). Torque to 150-250 inch pounds (16.9-28.3 Nm). (3) Connect electrical connec- tions to EGT thermocouple terminals (1). (4) Install engine housing access cover and secure with turnlock fasteners. (5)  Connect  battery  cable  plug connector to battery. 4-67. LOW OIL PRESSURE SHUTDOHN SWITCH. Maintenance  of  the  low  oil pressure shutdown switch consists of inspection,  testing,  and  replacement. a. Inspection. WARNING To  prevent  injury,  ensure  that battery is disconnected  before performing maintenance o  n electrical  components. (1)  Disconnect  battery  cable  plug connector  from  battery. (2) Loosen turnlock fasteners and remove engine housing access cover. (3) Inspect switch fittings (1, figure 4-42) and area between switch (2)  and  tube  cross  (5)  for  leaks. Tighten fittings   as   necessary.   If leaks persist between switch and tube cross,  replace  preformed  packing  (4). 4 - 1 28