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TM5-4210-229-14&P
Section IV. OPERATION UNDER UNUSUAL CONDITIONS
Para.
Para.
Operation at High Altitudes ........................................... 2-35
Operation in Mud .............................................. 2-34
Operation in Dusty or Sandy Areas ............................... 2-30
Operation in Salt Water Areas ........................... 2-32
Operation in Extreme Heat ............................................ 2-29
Operation in Snow ............................................ 2-33
Operation in Intermediate Cold (to -25° F) ..................... 2-28
Operation Under Rainy or Humid Conditions ..... 2-31
Scope ............................................................... 2-27
2-27. SCOPE.
This section covers the necessary operating instructions, in addition to those previously covered that are neces-
sary for the components of the Twin Agent 4x4 Firefighting Truck to function properly under unusual conditions,
such as in extreme heat or cold and in dusty and sandy areas.
2-28. OPERATION IN INTERMEDIATE COLD (TO -25° F).
The truck is not designed for firefighting
operations below 32°F (0°C). If the vehicle
is left in temperatures below freezing, it is
recommended that the AFFF agent be
drained (paragraph 2-23).
When operating in an intermediate cold climate, take the necessary precautions to prevent the truck from freez-
ing.
2-29. OPERATION IN EXTREME HEAT.
When operating in extreme heat, particular attention must be paid to the lubrication and cooling system of the fire
truck. Protect the fire truck from the direct rays of the sun as much as possible.
2-30. OPERATION IN DUSTY OR SANDY AREAS.
When operating in dusty or sandy areas, keep all lubrication points clean and well lubricated. Lubricate sparingly,
but more frequently than under normal conditions. Wipe fittings thoroughly before applying grease. Clean all oily
or greasy surfaces. Service the engine air cleaner, breather and oil filter more frequently than under normal con-
ditions. Service the radiator, fuel tank, and fuel filters.
2-31. OPERATION UNDER RAINY OR HUMID CONDITIONS.
When operating under rainy or humid conditions, the high humidity causes rusting or corrosive action on exposed
metal surfaces. Coat all exposed metal surfaces with engine oil or appropriate protective coating. Keep the fuel
tank as full as possible to eliminate condensation.
2-76
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