If the radiator shutters are partially
closed during operation, to maintain
normal operating temperature, the con-
trol panel must be frequently observed
to prevent overheating.
Fuel System. Fuel tank should be kept as full as possible at all
times to reduce the possibility of moisture forming in the tank.
Service the fuel filters (paras. 84 and 85 ) as necessary, to remove
any accumulated water or ice. Keep the fuel tank filler cap and
screen free from ice and moisture. Use the fuel primer pump (fig.
2-2 ) to start the engine in cold weather.
Batteries. A fully charged battery can withstand extreme cold while
a partially charged battery may freeze and crack the cells. Refer to
TM 9-6140-200-12 for electrolyte specific gravity readings at various
temperatures. Make sure electrolyte level is above the battery
plates. Add distilled water as necessary.
Run the engine to charge the batteries
for at least 30 minutes after adding wa-
ter. This will mix the water and elec-
trolyte thoroughly and prevent freezing.
OPERATION IN EXTREME HEAT.
Refer to current lubrication order and lubricate with
Engine Cooling System. Keep the cooling system free of scale and
rust. Check coolant frequently and maintain proper level. Drain
and flush frequently; fill with clean water. Make sure the thermo
stats and shutter are in good working order and that the fan belt
tension is correct. The radiator shutters must be open during oper-
Check battery electrolyte level and add distilled water as
Dynamotor-Welder. Check the dynamotor-welder air filters frequently.
Clean, ventilating air filters are necessary to maintain maximum ven-
tilation through the dynamotor-welder at all times.
OPERATION IN DUSTY OR SANDY AREAS.
General. Dust and dirt can cause premature mechanical failure of
the shop set components. Locate the shop set in a well protected
area, whenever possible. Keep the shop set as clean as possible,
paying particular attention to the screens, grills, and filters. Use
compressed air to clean, for best results.