TM    5-3805-258-24-1 O P E R A T O R ’ S     S T A T I ON E L E C T R I C A L  S Y S T EM (1)  Service  Meter The service meter is activated by the Start Protect and  Service  Meter  Relay.  It  runs  only  when  the engine is in operation. When the alternator supplies 12V to the relay it will energize. The relay will then supply the ground to the service meter, starting the service  meter. (2) Hydraulic Oil Temperature Indicator With the main power key switch in the ON posi- tion, the red indicator light will be on if the hydraulic oil  temperature  goes  above  102°C  (215°F).  The master fault light will also be on. The indicator light will also be on with the main power  key  switch  turned  ON  and  the  panel  test switch moved to the TEST position. (3) Coolant Temperature Indicator With the main power key switch in the ON posi- tion, the red indicator light will be on if the engine coolant  temperature  goes  above  107°C  (225°F). The master fault light will also be on. The indicator light will also be on with the main power switch turned ON and the panel test switch moved to the TEST position. (4) Brake Oil Pressure Indicator With the main power key switch in the ON posi- tion, the red indicator light will be on if the travel of the brake pedals is to far, indicating loss of brake oil pressure. The master fault light and fault alarm will also be on with the engine in operation. The indicator light will also be on with the main power key switch turned on and the panel test switch moved to TEST position. (5) Engine Oil Pressure Indicator With the main power key switch in the ON posi- tion, the red indicator light will be on. With the engine in operation, the red indicator light will come on if the engine oil pressure falls below  approximately  62  kPa  (9  psi).  The  master fault light and the fault alarm will also be on. The indicator light will also be on with the main power switch turned ON and the panel test switch moved to the TEST position. S Y S T E M S      O P E R A T I O N (6) Brake Air Pressure Indicator With the main power key switch in the ON posi- tion,  the  red  indicator  light  will  be  on  if  the  air pressure is below 448 kPa (65 psi). The master fault light will also be on. If the air pressure falls below 448 kPa (65 psi), with the engine in operation, the red indicator, the master fault light, and the fault alarm will turn ON. The indicator light will be on with the main power key  switch  turned  ON  and  the  panel  test  switch moved to the TEST position. (7) Transmission Oil Temperature Indicator With the main power key switch in the ON posi- tion, the red indicator light will be on if the transmis- sion  oil  temperature  goes  above  135°C  (275°F).  The master fault light will also be on. The indicator light will be on with the main power key switch ON and the panel test switch turned to the TEST  position. (8) Parking Brake Indicator With the main power key switch in the ON posi- tion,  the  transmission  in  NEUTRAL,  and  the  park- ing  brake  activated  (either  because  the  parking brake is manually activated or because of low air pressure), the red indicator light will be on. If the transmission  lever  is  moved  to  FORWARD  or  RE- VERSE,  the  indicator  light  and  the  master  fault light will be on. With the engine in operation, the fault alarm will also be on. The indicator light will be on with the main power key switch ON and the panel test switch turned to the TEST  position. (9)  Alternator  Indicator With the main power key switch in the ON posi- tion and the engine not in operation, the indicator light will be on. With the main power key switch in the ON posi- tion  and  the  engine  in  operation,  the  indicator  light will be OFF if the alternator makes enough voltage to activate the EMS panel. 3-136