TM 10-3930-664-10 SECTION IV.  Operation Under Unusual Conditions 2-17. GENERAL This  section  provides  the  operator  with  additional  instructions  for  operating  in  various  environments  and  emergency situations. 2-18. OPERATION IN EXTREME MOIST HEAT At Parking or Halt. (1) If possible, park the 4KRTFL under shelter. (2) Dry the seat and wiring to prevent the formation of mildew. (3) Keep the fuel tank full at all times to prevent condensation from forming in the tank. (4) Contact organizational Maintenance to check all points of lubrication according to LO10-3930-664-12. 2-19. OPERATION IN EXTREME DRY HEAT.  (Refer to FM90-3, DESERT OPERATIONS) a. Preparation.  Precautions must be taken to avoid overheating. (1) Contact Organizational Maintenance to drain, flush and refill cooling system. (2) Contact Organizational Maintenance to lubricate the 4KRTFL with correct grade of lubricants in accordance with Lubrication Order, LO10-3930-664-12. b. Operation. (1) Check the water temperature and transmission oil temperature gauges at frequent intervals. (2) Check the air cleaner indicator frequently.  Service the filter as often as required. c. At  Halt  or  Parking.    Park  the  4KRTFL  in  shaded  area,  if  possible.    Cover  seat,  steering  wheel,  controls,  and gauges to protect them from direct heating by the sun. 2-20. OPERATION IN EXTREME COLD a. Preparations.    Extensive  preparation  of  mechanical  equipment  is  required  when  extreme  cold  weather    is anticipated.   The  following steps will help protect the vehicle against subfreezing temperatures. (1) Contact  Organizational  Maintenance  to  prepare  the  cooling  system  by  draining  and  then  refilling  with antifreeze appropriate for anticipated temperatures.  Refer to Appendix D and FM 4-367. (2) Contact Organizational Maintenance to  change  the  engine  lubricating  oil  to  the  grade  called  for  in  LO10- 3930-664-12 for cold weather operation. b. Starting the Engine. (1) Try starting the engine using the procedure given in paragraph 2-10. 2-45

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