MIL-DTL-46709F(AT)
3.4.1.3.3 Transmission, transfer assembly, and final drives. The transmission shall
contain lubricating oil only conforming to MIL-L-21260 of the grade specified in the applicable
drawing, specification, or lubrication order and filled to operating level. The transfer assembly,
and final drives shall contain lubricating oil conforming to MIL-L-21260 of the seasonal grade
specified in the applicable drawing, specification, or lubrication order and filled to operating level.
3.4.1.3.4 Engine crankcase. The crankcase shall be filled to operating level with
lubricating oil conforming to MIL-L-21260 of the seasonal grade specified in the applicable
drawing, specification, or lubrication order.
3.4.1.3.5 Cooling system. Unless arctic or tropic processing is specified (see 6.2), the
cooling system shall contain a clean solution consisting of equal parts by volume of antifreeze
(ethylene glycol) conforming to A-A-870 and water and filled to capacity. The engine shall be
operated until a temperature has been reached that causes the thermostat to open and ensures
complete mixing and even distribution of the antifreeze solution. The coolant shall show
protection to minus (-) 40 degrees Fahrenheit (°F) (-40 degrees Celsius (°C)) (see 4.5.3).
3.4.1.3.5.1 Tropic preparation of cooling system. When specified for shipment and
storage in a tropic environment, the cooling system shall contain the coolant specified in the
contract or order (see 6.2 and TM 9-2350-311-10).
3.4.1.3.5.2 Arctic preparation of cooling system. When specified for shipment and
storage in an arctic environment, the cooling system shall contain the coolant specified in the
contract or order (see 6.2 and TM 9-2350-311-10).
3.4.1.3.6 Fire control items.
3.4.1.3.6.1 Quadrant, periscope, and telescope. Immediately after cleaning, optics shall
be covered with a four-layer thickness of lens tissue conforming to A-A-50177. The lens tissue
shall be secured with tape conforming to type II of MIL-T-22085. All exposed, unpainted metal
surfaces shall be coated with grease conforming to MIL-PRF-10924.
3.4.1.3.6.2 Vehicles with panoramic telescope ballistic cover assembly installed. Ballistic
glass will be covered with 0.50 inch (in.) (12.7 millimeters (mm)) plywood, sealed along edges
with tape conforming to ASTM D5486, type 1, class 1. Secure with nonmetallic strapping, in
accordance with ASTM D3950 and ASTM D4675. Ballistic cover assembly will be turned
90 degrees to the right to reduce the possibility of damage.
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