TM 10-3930-671-10 Know The Truck How The Lift Truck Operates Warning  Indicator  Lights  are  provided  for  protection  of  four  important systems of your lift truck: 1. Ammeter (Battery charging system). 2. Engine oil pressure. 3. Water temperature (Engine coolant). 4. Transmission oil temperature. The  ammeter  warning  light  indicates  when  the  battery  is  receiving  no  charging  current.    The  engine  oil  pressure  light indicates if a problem causes oil pressure to drop below a safe level.  The water temperature light warns that the engine coolant is too hot and damage can result if operation is not stopped until the reason for high temperature is corrected.  The transmission  oil  temperature  light  warns  that  the  transmission  oil  is  too  hot  and  damage  can  result  if  operation  is  not stopped until the reason for high temperature is corrected. The warning lights can be tested with the ignition key switch. Turn the ignition key switch clockwise to the "RUN" position.  The ammeter and engine oil press lights should illuminate, and the fuel gauge needle should indicate fuel level. The  water  temp  and  trans  oil  temp  lights  are  also  illuminated  for  checking  when  the  ignition  key  switch  is  turned  to  the "START" position.  Note:  If you don’t want to start the engine when checking these warning lights, move the directional control lever from "NEUTRAL" briefly only, while turning the ignition key switch to the "START" position.  After checking the lights, turn the key switch back to "OFF." E-53