18. When the tract cannot be parked in a heated garage at subzero ambient temperatures, drain water from the cooling system, for which purpose, perform the following:- remove the filler cap of the radiator or of the expansion tank;- open the three cocks (four cocks with an expansion faanir available) and let the water flow down completely;- being sure that the water has been drained completely, close the cock of the cab heater. The other cocks should remain open;- reinstall the filler cap of the radiator (or of the expansion tank).19. At ambient temperatures below -15°C, remove the storage battery from the vehicle and keep it in a heated room.Check the condition of the radiator muff,sealing boots and tarpaulin covers and secure them in place.20. When the truck is used in sandy desert localities, take the following steps in addition to Paras 1 through 17»Check the condition and fastening of the dust protecting boots and cups.Wipe clean and dry the surfaces of storage battery with dry cotton waste and check the battery cells for the electrolyte level. The level should be 10 to 15 mm above the protective shield located above the separators. A lower electrolyte level calls for topping up with distilled water. Check and clean, if needed, the vent holes.CAUTiarn Never top up a battery with electrolyte, except the cases when it is known for sure that the electrolyte has been spilled over. If that is the case, the specific gravity of the elec¬trolyte being added should be the same as that of the electrolyte in the battery.21. When the truck is operated in mountainous localities of high altitudes, the following steps should be taken in addition to Paras 1 through 17:- drain water from the cooling system;- check the condition and fastening of the auxiliary braking devices available on the truck;- check the electrolyte level in the battery cells (every three days). Clean the vent ping holes,22. Each time after fording^proceed as follows:- check the condition of oil in all the units by slightly opening the drain plugs. If water is detected in the oil of any unit, use the first opportunity to change the oil. See to it that this is done at least an the same day;- the first opportunity should be used (not later than on the same day) to pack all the lubricating cups of the chassis with grease until it is forced out.
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