EXTREME COLD WEATHER MAINTENANCECONTINUED
Fill fuel cell with fuel, grade DF-A
(NATO F-56) and install fuel fill cap.
(6) Provide suitable container and drain
approximately one quart of fuel from each of
the low pressure and high pressure fuel filters
(2 and 3). Close drain valves.
(7) prime fuel system. Refer to page
(8) Use fuel cycle switch (4) and pump
and heater igniter switch (5) for approximate-
ly 2 minutes and then idle engine at 1200
rpm for 5 minutes to warm up engine.
c. Coolant System Maintenance. Refer to
FM 9-207 for instructions on draining and
cleaning coolant system and selection, ap-
plication and checking of antifreeze comounds
to suit anticipated conditions.
(1) Check and make sure antifreeze in
coolant is correct for lowest anticipated
temperature. When adding water to system,
make sure antifreeze protection is maintained.
Operate engine to mix coolant.
(2) Operate coolant heater when vehicle
is parked, if installed (Chapter 5).
(3) Make sure fan well deck is covered
when vehicle is parked to keep out blowing
snow. Check and remove any accumulated
snow from fan well before starting engine.
d. Battery Maintenance. Refer to FM
9-207 for method of correcting specific gravi-
ty readings for batteries exposed to extreme
(1) Start and run engine for approx-
imately 30 minutes at 1200 rpm to charge
batteries immediately after adding water to
batteries so water will combine with battery
acid and not freeze.
(2) Keep batteries fully charged during
extreme cold weather. The colder batteries
become the more battery electric power out-
put is diminished.
(3) Operate coolant heater, if installed
(Chapter 5), when vehicle is to be parked for several
hours. If coolant heater is not installed, have unit
maintenance personnel remove batteries and store in
a warm place. When reinstalling batteries, make
sure cables and terminals are clean and tight.