MIL-DTL-62220C
3.4.1.8 Closure. Specified openings of the vehicle shall remain open to allow drainage or
ventilation (see 4.4.3). Other specified openings of vehicle shall be sealed to prevent entry of
moisture. Processing for closure and ventilation shall meet carrier and transportation
requirements.
3.4.1.8.1 Ventilation. Unless otherwise specified (see 6.2), all hull drain valves shall be
placed in the open position. After removal of the access covers, gaskets, and hardware from the
underside of the vehicle, screens constructed of wire cloth, 0.047 inch diameter wire, 4 squares
per square inch mesh, shall be installed in access cover openings (see Figure 2). The screens shall
be held in position by installing the bolts and washers. The following deprocessing information
shall be marked on DA Form 2258: "REMOVE AND DISCARD SCREENS AND
HARDWARE. INSTALL ACCESS COVERS, NEW GASKETS, AND NEW HARDWARE
BEFORE OPERATION."
3.4.1.8.2 Vision blocks. Immediately after cleaning and drying the vision blocks shall be
covered with lens paper conforming to A-A-50177. The lens paper shall then be covered with
weather resistant fiberboard conforming to ASTM D4727, heatsealed in a bag conforming to
MIL-B-117 class E, type I, TYVEK. Secure perimeter of bagged fiberboard with tape
conforming to MIL-T-22085, type IV.
3.4.1.8.3 Hatches and doors. The rubber seals around hatches and doors shall be coated
with powdered talc conforming to talc, technical T1, MIL-T-50036. Both personnel doors shall
be secured with a bolt placed through the locking lugs. After the nut is drawn tight, the nut shall
be tack welded to the bolt, or other equally effective method shall be used to prevent
unauthorized entry. During storage, the hatches and doors shall be closed and secured in the
CLOSED position.
3.4.1.9 Loading. Each vehicle shall be properly loaded and secured for transport
(see 4.4.3). Loading and securement methods shall be sufficient and safe for the intended
purpose. Loading and securement shall conform to carrier requirements and applicable
transportation regulations.
3.4.1.9.1 Vehicle lifting and towing. Lifting and towing of the vehicle shall be in
accordance with approved methods. Lifting capacity exceeding 70 tons is required.
3.4.1.9.2 Loading for commercial shipment.
3.4.1.9.2.1 Loading for commercial rail shipment. Loading and securement of
commercial rail shipment within the U.S. and Canada shall conform to The American Association
Of Railroads, The General Rules Governing Loading Of Commodities On Open Top Cars,
section 1, and Rules Governing The Loading Of DoD Materiel On Open Top Cars, section 6,
Tanks and Similar Units Over 100,000 lb. Route clearances are required before movement.
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