TM 10-3930-659-20 1-16. ELECTRICAL SYSTEM  (Con't). c. Monitoring System.  The monitoring system includes a variety of electrical senders, and associated gages and indicators located in the cab.  This allows the operator to be aware of the status of the forklift truck during operation. For a description of the function of each monitor within the system, see TM 10-3930-659-10. d. Windshield  Wipers  and  Washers.    Separate  wipers,  washers,  and  controls  are  provided  for  the  front windshield and rear cab window. 1-17. ON-BOARD CRANE. The  900  lb  (409  kg)  capacity  crane  is  used  to  remove  and  install  the  conveyorized  forks,  cab  upper  section,  and counterweight.  It is hand-operated and can be raised or lowered to three different operating positions with quick-release pins. 1-18. FORKLIFT WINTERIZATION PACKAGE. a. The forklift truck is equipped with a winterization package that protects the forklift truck systems down to, -65°F (-540C). b. The winterization package consists of an engine coolant heater, engine oil pan heater, battery heaters, and 110-volt  junction  box.    Heaters  are  operated  by  an  external  110-volt  AC  power  source  and  are  equipped  with  a thermostat  for  overheat  protection.    An  extension  cord  has  been  provided  to  connect  the  forklift  truck  to  the  power source. c. The engine coolant heater is located in the engine cylinder head just behind the hydraulic reservoir. d. The engine oil pan heater is located in the engine oil pan. e. Each  battery  has  a  blanket-type  heater  wrapped  around  the  battery  case  and  a  tray  heater  or  warmer underneath it.  The battery warmers are mounted on wooden insulators. 1-10