TM -9-2330-373-14 & P
2-24. OPERATION IN EXTREME COLD (cont) 1
(3) Gage tires for correct pressure, 50 psi (344.75 k pa) highway, 30 psi (206.85 k pa) cross-country, 20 psi
(137.9 k pa) soft sand, mud or snow,
2-25. OPERATION IN EXTREME HEAT
a. If possible, park semitrailer under cover to protect it from sun, sand and dust.
b. Cover inactive semitrailer with tarpaulins, if they are available and if there is no other available shelter. Shake out
and air canvas covers or other items subject to deterioration from mildew or attacks by insects or vermin for several hours
weekly.
c. Semi-trailers, inactive for long periods in hot, humid weather are subject to rapid rusting and accumulation of fungi
growth. Frequently inspect, clean and lubricate to prevent excessive deterioration.
2-26. OPERATION IN DUSTY OR SANDY AREAS
a. For emergency operations in beach and desert sands, correct tire inflation is 20 psi (137.9 k pa). For continued
operation in sand, oversize balloon sand tires may be necessary. The tread should be of plain rib and the tire of round
cross section.
2-27. OPERATION IN MUD AND SNOW
a. Reduce tire inflation to 20 psi (137.9 k pa).
b. After each operation, remove ice, snow and mud from underneath semitrailer and from hoses, lines, tubes, and
electrical connections.
2-28. OPERATION UNDER RAINY OR HUMID CONDITIONS
a. Protect semitrailer from direct rainfall whenever possible. During dry periods open doors to speed drying process.
b. Dampness increases corrosive action. Inspect painted surfaces and electrical connections more frequently for
damage.
2-33
