Table  2-1.  Freezing  Points,  Composition,  and  Specific  Gravities  of  Military  Antifreeze  Materials. Lowest expected ambient temperature ^oF +20 +10 0 -10 -20 -30 -40 -50 -60 -75 Pints of inhibited glycol per gallons of coolant 1½ 2 2¾ 3¼ 3½ 4 4¼ Arctic antifreeze preferred Compound,  antifreeze Arctic² Issued full strength and ready mixed for 0^o to -65^oF temperatures for both initial installation  and replenishment of losses. DO  NOT  DILUTE WITH  WATER  OR ANY   OTHER   SUBSTANCE Ethylene  glycol coolant solution specific  gravity 68^oF3 1.022 1.036 1.047 1.055 1.062 1.067 1.073 ¹Maximum protection is obtained at 60 percent by volume (4.8 pints of ethylene glycol per gallon of solution.) ²Military Specification MI L-A-11755 Arctic type, nonvolatile antifreeze compound is intended for use in the cooling system of liquid-cooled internal combustion engines. It is used for protection against freezing primarily in Arctic regions where the ambient temperature remains for extended periods close to -40^oF or drops below, to as low as -75°F. ³Use an accurate hydrometer. To test hydrometer, use 1 part ethylene glycol antifreeze to 2 parts water. This should produce a hydrometer reading of 0^oF.  Fasten a tag near the radiator tiler cap indicating the type antifreeze, WARNING Do not smoke or use an open flame in the vi. cinity when servicing batteries. Batteries generate hydrogen, a highly explosive gas. Electrolyte contains sulfuric acid and can cause severe burns. Handle it with care. If the solution comes in contact with the body, eyes or clothing, rinse immediately with clean  water.  Avoid  spilling  electrolyte  on painted surfaces. Slave     receptacle     is     to     be     used when    extra    cranking    power    is r e q u i r e d    f o r    s t a r t i n g    u n i t . The electrolyte level must be rechecked approximately 30 minutes after initial filling as the plates and separators will ab- sorb the solution, thus, resulting in a low level. If the battery is not used within 12 hours after initial filling,it should be put on a charger and brought up to the correct specific gravity. Test batteries as described in paragraph 8-82b. for the ambient tem- perature in effect. (4) Check crankcase oil level (para3-3c.) and add oil as necessary (para 3-4c. ) in accordance with the lubrication order (fig. 3-l). Depreservation requires that the crankcase be drained and refilled (para 3-46). (4a) Class 1 sets only. (MEP105A). Check hydraulic oil level and add oil as necessary in accordance with the lubrication order (fig.  3-1). O t h e r    m e t h o d s    a r e    n o t    a u t h o r- (5) Perform the before operation preventive maintenance i z e d , a s     a r c i n g     a t     b a t t e r i e s services specified in table 3-1. c o u l d    o c c u r. 2-4. Installation of Separately Packed Components. (3) Batteries are shipped in a dry state. Battery electrolyte No separately packed components are shipped with generator must be requisitioned separately. To activate the battery remove sets. cell caps and fill battery cells with electrolyte. Make sure vent holes in cell caps are open, and replace caps. 2-2 Change 12