Section II. OPERATION UNDER UNUSUAL CONDITIONS

ARMY TM 9-6115-464-12 AIR FORCE TO 35C2-3-445-1 NAVY NAVFAC P-8-624-12 Section II. OPERATION UNDER UNUSUAL CONDITIONS 2-14 OPERATION IN EXTREME COLD (Below -25° F). a. General. The generator set is designed to operate in ambient temperature as low as -25° F (-31 ⁰C) without special winterization equipment. For operation at lower temperatures, the engine must be heated by either a fuel burning or electric winterizaton kit. Refer to paragraph 2-22 and 2-23 for operation instructions for these winterization kits. (1) (2) (3) (4) (5) Cleaning. Keep the generator set and surrounding area as free of ice and snow as practical. Pay particular attention to the fuel tank cap and filler neck. Fuel System. Keep the fuel tank as full as possible to prevent condensation of moisture. Service the fuel tank with the proper grade of fuel for the existing ambient temperatures. Service the fuel strainer and filter assembly and secondary fuel filter at more frequent intervals. At the end of operation cycle, drain sediment from the fuel tank, fuel strainer and filter assembly, day tank, and secondary fuel filter. Engine Electrical System. Keep the batteries clean and inspect regularly for cracked and damaged cases. Keep the batteries fully charged at all times to avoid freezing. After adding distilled water to the batteries, operate the engine for at least an hour. Inspect the entire electrical system frequently for cracked, broken and frayed insulation. Tighten any loose connections and mounting damps. Lubrication. Make sure that lubricants used are as specified for the prevailing ambient temperature by the current Lubrication Order. Cooling System. Use a hydrometer to check the specific gravity of the coolant. Maintain the coolant specific gravity as specified for the prevailing ambient temperature in Table 2-1. 2-15 OPERATION IN EXTREME HEAT (Up to 125°F). a. b. c. d. e. f. Cooling System. Check coolant level daily. Maintain coolant level approximately two inches below the radiator overflow pipe. Check that radiator Iouver control is operating properly. Check louvers and radiator air passages for obstructions frequently. Check fan belt for proper tension. Check coolant temperature gauge frequently for any indication of overheating. Lubrication. Make sure that lubricants used are as specified for the prevailing ambient temperature in the current Lubrication Order. Fuel System. When filling the fuel tank, allow sufficient space for fuel expansion. Batteries. Check electrolyte level frequently. Add distilled water as required to compensate for evaporation. Generator. Keep the generator clean and free of dirt. Make sure that the generator ventilating screen is free of obstructions which would inhibit airflow. Engine. Keep the external surface of the engine as clean as possible. 2-16 OPERATION IN DUSTY OR SANDY AREAS. a. b. c. d. e. 2-24 General. If possible, provide a shelter for the generator set. Use available natural barriers to shield the generator set from blowing dust or sand. Keep all access doors closed as much as possible to prevent entry of dust and sand into the enclosure assembly. If water is available, wet down dusty surface areas around the set frequently. Cleaning. Wipe dust and sand from the generator set components frequently. When the generator set is not operating, the exterior surface should be thoroughly washed down with clean water. Engine. Shorten the service interval for the engine air cleaner and oil filter to compensate for intake of additional dust or dirt. Keep the external surface of the engine as clean as possible. Fuel System. Drain sediment from the fuel tank, fuel strainer, and fuel filters frequently. Be particularly careful to prevent dust or dirt from entering the fuel tank. Shorten the service intervals for the fuel filters appropriately. Lubrication. Lubrication intervals must be shortened appropriately. Use particular care to keep lubricants from becoming contaminated with dust or dirt.