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Page Title: GAUGES AND INSTRUMENTS
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TM 5-4210-230-14&P-1 GAUGES AND INSTRUMENTS If  a  failure  is  experienced  in  one  side  of  the  split hydraulic   system,   the   vehicle   will   still   have   the   remaining portion   of   the   split   system   to   allow   stopping   the   vehicle; however,  the  vehicle  should  be  operated  only  with  extreme caution to reach a repair facility since the braking capabilities will be reduced. BATTERY GENERATING SYSTEM GAUGE VOLTMETER The    battery,    generating    system    indicator    gauge indicates   the   condition   of   the   battery,   alternator   and   the voltage regulator. The gauge is divided into two sections.  The left hand side for the battery and right hand side for generating system. Before    starting    engine    the    gauge    will    show    the condition  of  the  battery.    The  battery  section  of  the  gauge  is subdivided into two colored segments. GREEN - a properly-charged battery RED - a low battery charge With   the   engine   running   at   operating   speeds,   the gauge will show the condition of the generating section as the gauge is divided into two colored segments: GREEN - generating system working properly RED - voltage output too high or too low Constant reading in either RED area indicates that a complete   check   of   the   battery   and   generating   system   be made. ENGINE SHUTDOWN WARNING LIGHT OR BUZZER Vehicles    may    be    equipped    with    an    automatic    shutdown system  which  stops  the  engine  in  the  event  of  high  coolant temperature or low engine oil pressure.  A warning light on the instrument panel along with a buzzer or bell will indicate high coolant  temperature  or  low  oil  pressure.  If  the  temperature and/or   pressure   continued   to   change   beyond   the   warning point  to  a  predetermined  level,  the  engine  will  automatically shut  down.    Vehicles  are  equipped  with  an  override  feature which will allow the engine to be re-started so that the vehicle can   be   moved.   The   engine   should   be   run   no   longer   than absolutely necessary.  A decal located in front of the operator provides instructions on how the override should be operated. FRONT AXLE ENGAGEMENT LIGHT This light will glow when the front axle is engaged. FUEL GAUGE The fuel gauge is electrically operated and indicates the  level  of  fuel  in  the  tank.    The  gauge  registers  only  when the ignition is "on". HOUR METER In    certain    types    of    operations,    the    speedometer (odometer)  reading  is  not  an  accurate  guide  for  engine  or chassis  lubrication  intervals  The  hour  meter  reading  can  be used  as  a  guide  in  determining  lubrication  and  maintenance intervals. For example: Short haul operations involving considerable reverse gear work. The hour meter records the number of hours that the engine has operated. OIL PRESSURE GAUGE ENGINE The engine oil pressure gauge indicates the amount of oil pressure being delivered to the engine. If   gauge   fluctuates   or   does   not   register   when   the engine is operating, stop the engine immediately and correct cause. OIL PRESSURE WARNING LIGHT With  ignition  switch  turned  "ON"  the  light  will  glow before  engine  starts.    If  light  fails  to  go  "OUT"  after  starting engine, stop engine and determine cause of low oil pressure. PYROMETER A   pyrometer   is   connected   to   a   thermocouple   to indicate  the  temperature  of  the  exhaust  gases  entering  the turbine side of the turbocharger. SPEEDOMETER AND ODOMETER The speedometer indicates the vehicle speed in miles or  kilometers,  per  hour.    The  odometer  records  the  total  of numbers of miles travelled. TACHOGRAPH The    tachograph    indicates    the    engine    speed    in revolutions  per  minute  and  records  the  number  of  hours  the engine   has   operated.      The   hour   meter   is   based   upon   the average of 100,000 revolutions per hour. 2

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