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 TB 740-97-4
Lighters stored in open areas or shed storage in excess of 90 days will have the tires protected as specified below:
(a) Installed pneumatic and semi-pneumatic tires, manufactured from natural or synthetic compounds or a
combination thereof, will be protected during storage by enclosing tires and wheels within protective polyethylene bags as outlined in
Specification MIL-T-46755(MO).
(b) Tires identified as manufactured with OZ compounds (as illustrated in fig. 2 of MIL-T46755(MO)) do not
require additional protection until 2 years from the date of manufacture, After 2 years from the date of manufacture, tires will be
protected as specified in (a) above.
(c) When a lighter is equipped with a combination of NON-OZ and OZ tires less than 2 years old and any other
tires 2 years old or older, all tires on the lighter will be protected during storage as specified in (a) above.
(3) Preparation prior to placing bag over tire and wheel assembly.
(a) Slack allowance. Lighters will be raised for installation of bags. Care will be exercised to assure that sufficient
slackness is left in the bottom of the bags when the lighter is lowered to the ground. The bag will be positioned in a manner which
will prevent obstruction of drain holes when bag contacts ground surface. If the enclosed tires and wheels are to be stored on gravel,
turf or unpaved areas, a piece of fiberboard or other suitable material of sufficient size will be placed on the ground surface under the
bag to prevent rupturing the bag.
(b) Cleaning. Prior to installation of the polyethylene bag, each tire and wheel assembly will be cleaned in
accordance with process C-1 of MIL-P-116 to insure removal of all foreign objects imbedded or lodged in tire treads. Tires will be
thoroughly dried in accordance with any applicable drying process of MIL-P-116.
(4) Installation of bags. Polyethylene bags will be placed over the tire and wheel assembly and positioned in a manner
chat will permit securing to axes. Excess material at the bag opening will be folded and formed to the contour of and against the axle
assembly Bag will then be secured to the axle assembly using rope conforming to class 2, size (circumference) 5/8 inch, of T-R-571.
Corners of the bag will be folded against the installed bag and secured in that position with tape conforming to type IV of PPPT-60
(a) Drain holes. Two drain holes approximately 1/4 inch in diameter will be provided in each bag. Drain holes will
be positioned at the lowest point of the installed bag, as illustrated in figure 3 of MIL-T-46755 (MO).
(b) VCI application. Crystalline volatile corrosion inhibitor (VCI) or treated carrier type VCI will be used within each
polyethylene bag. When crystalline VCI is used, it will conform to type I of MIL-I-22110, dicyclohexyl ammonium nitrate formulation,
NSN 6850-00-368-5233. Twenty grams will be blown into the polyethylene bag by any suitable means. When treated carrier VCI is
used, it will conform to type I, class 2, style B of MIL-I-3420, dicyclohexyl ammonium nitrite formulation, NSN 8135-00-664-4012.
One strip 12 inch wide and length equal to the circumference of the tire plus 2 inches, will be placed around the circumferences of the
tire, VCI side out per polyethylene bag, and will be secured in place with tape conforming to type IV of PPP-T60.
(5) Surveillance of bagged tires. Periodic surveillance of storage areas where lighters containing bagged tires are stored
will be maintained to determine condition of bags. When bags are loosened due to severe wind storms, the bags will be retightened
at the ties. All small tears will be sealed with tape conforming to type IV of PPP-T-60. If severe damage occurs, the tire bag will be
replaced.
J-3
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