TM 9-2590-209-14&P
Section III. OPERATION UNDER UNUSUAL CONDITIONS
2-7. General Conditions
2-9. At Halt or Parking (Extreme Cold Weather)
a. In addition to the normal preventive maintenance
checks and services, special care in cleaning and
a. When halted for short shutdown periods, park
lubrication must be observed where extreme
vehicle in a sheltered spot out of the wind. If no shelter
temperature, humidity, and terrain conditions are present
is available, park so that front of vehicle faces into wind.
or anticipated.
Properly cleaned and lubricated
This prevents rain, snow, and sleet from entering engine
equipment insures proper operation and guards against
compartment through rear grille doors.
excessive wear of working parts.
b. When shut down for a long period, and high dry
b. Refer to table 2-1 for preventive maintenance
ground is not available, park vehicle on a footing of
checks to be performed.
planks or brush. Place bulldozer in out-of-operation
condition to prevent possible freezing in an engaged
c. When chronic failure of equipment results from
position.
subjection to extreme conditions, failure(s) should be
reported using Form SF368.
c. Clean mud, snow, and ice from vehicle after
operation.
2-8. Extreme Cold Weather.
2-10. At Halt or Parking (Extreme Hot Weather).
a. Extensive preparation of equipment scheduled for
operation in extreme cold is necessary. Generally,
a. Do not park vehicle in the sun for long periods.
extreme cold will cause lubricants to thicken, and
When practical, park vehicle under cover to protect it
batteries to freeze or furnish less current than needed for
from sun, sand, and dust.
cold-weather starting. Extreme cold can crack insulation
and cause electrical short circuits, prevent fuel from
b. Cover inactive vehicle with tarps if no other
vaporizing and properly combining with air to form a
suitable shelter is available.
combustible mixture for starting. It will also cause M9
bulldozer components to become hard, brittle, and more
c. Vehicles inactive for long periods in hot humid
likely to break.
weather are subject to rapid rusting and accumulation of
fungus growth. Make frequent inspections, clean and
b.
M9 bulldozers scheduled for extreme cold
lubricate as prescribed in lubrication instructions (fig 4-1)
operation must be checked for proper lubrication. If
to prevent excessive deterioration.
lubrication is required, refer to lubrication instructions (fig
2-11. Operation in Hot, Humid, or Salty Areas.
Inspect vehicle frequently for moisture or corrosion and
c. Always be alert for indications of the effect of cold
accumulation of fungus growth.
Dry all exposed
weather on equipment.
unpainted surfaces and lubricate as prescribed in
lubrication instructions (fig 4-1) at frequent intervals.
d. Caution must be taken when placing the vehicle
in motion after a shutdown. Thickened lubricants may
2-12. Blade Emergency Lifting. Two emergency lifting
cause failure of parts. After engine has been thoroughly
cables are used to raise the blade assembly when the
warmed up, drive vehicle slowly about 100 yards to heat
hydraulic system is inoperative (fig 2-7).
lubricants to a point where normal operation can be
expected.
2-11
