TM 9-2330-398-10
Section IV. OPERATION UNDER UNUSUAL CONDITIONS
Paragraph
Page
Number
Paragraph Title
Number
General ................................................................................................................................. 2-61
Operation in Extreme Cold .................................................................................................... 2-61
Operation in Extreme Heat .................................................................................................... 2-62
Operation in High Humidity and Saltwater Areas................................................................... 2-62
Operation in Mud and Snow................................................................................................... 2-63
Operation in Dusty or Sandy Areas........................................................................................ 2-63
Fording ................................................................................................................................... 2-63
2-23.
GENERAL.
a.
This section contains instructions for safely operating the M969A2 semi-trailers under unusual conditions. In
addition to normal preventive maintenance service, special care must be taken to keep the M969A2 semi-trailers
operational in extreme temperatures and humidity.
b.
For information on driver selection, training, and supervision, refer to FM 55-30.
c.
For information on special driving instructions for operating wheeled vehicles under unusual conditions, refer to
FM 21-305.
2-24.
OPERATION IN EXTREME COLD.
WARNING
Sudden changes in temperature may cause M969A2 semi-trailers to develop leaks at the fittings
and connectors. Use caution and pay special attention to these areas. If something is broken or
worn out, report it to Unit maintenance. Corrective action must be performed before resuming any
operations. Failure to follow this warning may result in injury to personnel.
a.
Special care must be taken when operating M969A2 semi-trailers in extreme cold weather. Refer to FM 9-207 for
information on operation in cold weather.
b.
In addition to performing all normal PMCS, special care must be taken in regard to cleaning and lubrication when
extremes in temperature, humidity, and terrain conditions are present or anticipated. Proper cleaning, lubrication,
storage, and handling ensures proper operation and function and also guards against excessive wear. Refer to
c.
Generally, extreme cold causes lubricants to thicken or freeze and various semi-trailer construction materials to
become hard and brittle, and easily damaged or broken. The operator must be alert to effects of extreme cold on
semi-trailers.
d.
Care must be taken when handling cables. Extreme cold weather can cause insulation material on electrical wire
to crack, causing short circuits. Construction material may become hard, brittle, and easily broken or damaged.
2-61
