TM  9-2350-261-20-1 Subject,  Page Hoses  (cont): And  filters, 39-6 Air  cleaner, H  (cont) Ml3   NBC,   M577A2,   replace, replace,  7-3 Auxiliary  tank  deaeration,  replace,  8-32 Coolant: Fittings  and,  M113A2,  M577A2,  replace, 32-27 Fittings  and,  M160A2,  M125A2,  replace, 32-34 Pump  elbow,  and  tube,  to  radiator  outlet elbow,  replace,  8-14 Fittings  and  tubes: Air  box,  drain,  replace,  4-9 Compartment-to-bulkhead,   M125A2, M106A2,  replace,  6-81 Fuel  supply,  replace,  M577A2,  M1068,  6-60 Internal,  M125A2,  M106A2,  replace,  6-85 Pivot  steer,  brake,  repair,  23-68 Pivot  steer,  brake,  replace,  23-68 Return,  M577A2,  M1068,  replace,  6-66 Tank-to-bulkhead,   M113A2,   M901A1, M1059,  replace,  6-23 Vent,  M577A2,  M1068,  replace,  6-70 Heater  duct  and  hoses: Replace,  29-47 Heater,  fittings,  M3  NBC,  M113A2 ambulance,  replace,  39-77 Heater,  M13,  M1068,  replace,  39-65 Housing: Air  cleaner,  replace,  7-7 Thermostat  and  deaeration  elbow,  replace, 8-15 Thermostat  to  engine  coolant  tube,  replace, 8-18 How  to  use  this  manual,  vi Hub: Idler  wheel,  replace,  22-17 Road  wheel,  replace,  22-9 Hull drain plugs: Final  drive,  replace,  24-34 Replace,  24-31 Hull,  front  access  cover,  replace,  24-24 Hull,  welding,  repair  by,  26-1 Hupp  heater  electronic  equipment,  31-1 Hydraulic  fluid  flow  diagram: All, 28-2 Hydraulic  tank: Ramp  pump  to,  strainer  tube,  replace,  28-7 Subject,  Page H  (cont) Hydraulic  tank  (cont): Repair,   28-17 Replace,   28-17, Strainer,  replace,  28-15 I Identification,  2-27 Idler, fan drive: Adjustable,  and  pulley,  replace,  8-39 Fixed,  and  pulley,  replace,  8-37 Idler  pulley  and  belts,  engine  coolant  pump, replace,  8-9 Idler wheel: Arm   assembly: Replace,   22-20 Hub,  replace,  22-17 Replace,   22-16 Igniter,  replace,  32-7 Ignition  coil,  air  box  heater,  replace,  6-132 Indicator: Air  cleaner  restriction,  and  hose,  replace,  7-9 Differential  high  oil  temp,  comes  on,  3-68 Engine  oil  low  pressure,  fails  to  go  off  after engine  starts,  3-50 Lights,  panel  lights  and,  replace,  11-5 Transmission  oil  hi  temp,  comes  on,  3-71 Indicator malfunctions: Battery/generator,    3-143 Coolant  temperature,  3-144 Differential  oil  hi  temp,  3-159 Engine  oil  low  pressure,  3-148 Fuel  level,  3-134 High  beam  light,  3-140 Transmission  oil  hi  temp,  3-153 Infrared headlights: Does  not  operate,  3-83 Service  and,  repair,  12-5 Service  and,  replace,  12-3 Infrared  periscope  works  improperly,  3-112 Infrared power supply: Assembly,   replace,   12-134 Shock  mount  brackets,  replace,  12-136 Inspection,  2-33 Instrument panel: Gages,  replace,  11-11 Illumination  lights  malfunction,  3-107 Mounts  and  ground  lead,  replace,  11-2 On-off  switches,  replace,  11-7 Index  16 Change  4