TM-9-2320-285-10
TRUCK TRACTOR, YARD TYPE, 43,500 LB GVW, DED, 4X2, ARMY MODEL M878A1
TECHNICAL MANUAL; OPERATOR’S MANUAL
JUNE 1985
TM-9-2320-285-10 - Page 71 of 121
TM 9-2320-285-10
Section IV.
OPERATION UNDER UNUSUAL CONDITIONS
Para
Para
Operation in Unusual Weather .
.......................
2-17
Cooling System .
........................................
2-18b
Extreme Cold .
...........................................
2-17a
Lubrication .
................................................
2-18c
Extreme Heat .
...........................................
2-17b
At Halt .
......................................................
2-18d
Rainy or Humid Conditions .
......................
2-17c
Fifth Wheel .
...............................................
2-18e
Operation in Dusty or
Operation in Salt Water Areas .
........................
2-19
Sandy Areas .
.............................................
2-18
Operation at High Altitudes .
.............................
2-20
General .
....................................................
2-18a
Operation in Snow .
...........................................
2-21
2-17.
OPERATION IN UNUSUAL WEATHER
a.
Extreme Cold.
(1)
General.
Extensive preparation of the vehicle is required when extreme cold weather is anticipated.
Extreme
cold causes lubricants to thicken, presents a risk of freezing batteries and diminishes their electrical efficiency, can crack
electrical insulation to cause short circuits, prevents fuel from vaporizing readily to form the combustible mixture necessary
for starting, and causes various materials to become hard, brittle, and easily damaged.
You must make sure the cooling
system has been filled with the appropriate anti-freeze solution to protect the system against sub-freezing temperatures.
(2)
Cooling System.
Before the cooling system is drained and filled, inspect the system for leaks and general
condition.
All deteriorated or damaged hoses must be replaced.
Make sure that all clamps are tight and that drain cocks
are properly closed.
When anti-freeze is added to the cooling system, be sure ample space is allowed for the required
amount of anti-freeze.
Be sure you operate the engine for15 minutes to allow the solution to properly mix.
(3)
Lubrication.
Be sure that the correct grade of lubricant is applied to the lubrication points.
If necessary, drain
and refill if the lubricant grade is not correct for cold weather operation.
(4)
Fuel System.
Be sure precautions are taken to eliminate water and moisture from the fuel system by
completely filling the fuel tank after each operating period to avoid water condensation.
The fuel tank must not be allowed
to remain partly empty over long periods of time and all ice and snow must be completely removed from around the filler
opening before refilling the fuel tank.
(5)
Air System.
At end of daily
operation, drain water and sediment from air
reservoir.
Be sure that alcohol evaporator
reservoir is filled; check it daily.
Do not use if
temperature is above 32 degrees F.
2-51
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