TM 5-6115-400-12
2-16. Operation in Extreme Heat
b. Fuel System. Keep the fuel tank as full as
possible to prevent condensation of moisture. Be sure
a. Keep the cooling system free from rust and
to use the proper grade of fuel for existing temperature.
scale. If necessary, add an approved rust inhibitor.
See table below. Service the fuel filters and strainers
Avoid, if possible the use of alkaline water or salt water,
more frequently than usual. Remove ice, snow, and
which might cause the accumulation of rust and scale.
moisture from the filler cap and filler neck.
Make sure that the engine thermostat and shutter
thermostat are in proper working order. Inspect the V-
Caution: Do not close the circuit breaker of the
belts for proper adjustment (para 3-11). Be sure that the
incoming unit while the synchronizing lights are on.
generator set is free of dust and dirt.
Damage to one or both sets may result.
b. Lubricate the engine in accordance with the
current lubrication order (fig. 3-1).
Table 2-2. Fuels (Engine and Heater).
c. Do not fill the fuel tank too full; allow sufficient
room for expansion of fuel.
Type/
Ambient air
Name
Specification
grade
temperature
d. Inspect the electrolyte level of the batteries
Diesel
VV-F-800
DF-2
Above 20F.
daily. The plates should be covered with three-eighths
DF-1
-25F. to 20F.
inch of water. Add water if necessary.
DF-A
Below -25F.
e. Be sure that the generator is free of airflow
Cite
F-4121
---
All temperatures
restrictions. When operating indoors, make provisions
Jet
J-5624
JP-4
All temperatures
for adequate ventilation and the venting of exhaust
fumes to the outside.
c. Engine Electrical System. Clean the batteries
and cables and inspect for cracked or damaged cases.
2-17. Operation in Dusty or Sandy Areas
Be sure the battery terminals are tight, clean, and lightly
a. Where water is available, keep the immediate
greased. See that the battery cap ventholes are open.
area wetted down. Keep the unit as clean as possible,
The electrolyte level must be three-eighths inch above
paying special attention to the screens and grilles.
the plates. To prevent the batteries from freezing, see
b. In dusty or sandy areas, filters and strainers
that they are kept fully charged. Inspect all electrical
must be cleaned more frequently than under normal
wiring for cracks, breaks, and fraying. Tighten loose
conditions. Clean all lubrication points before and after
connections.
lubrication. Be sure that all lubricant containers are
Note. After adding water to the batteries in
tightly sealed and stored in an area free from dust and
freezing temperatures, run the engine for at least an
sand.
hour to thoroughly mix the water with the
c. Take all necessary precautions to keep dirt and
electrolyte.
grit out of the fuel tank.
d. Lubrication. Lubricate the generator set in
accordance with the current lubrication order.
2-18. Operating Under Rainy or Humid Conditions
e. Cooling System. Inspect the level of the coolant
Keep the fuel tank full to prevent forming of
in the radiator. Inspect the cooling system for leaks,
condensation. During dry periods when the set is not
paying particular attention to gaskets and hose
operating, open the doors, and allow the set to dry out.
connections. See that antifreeze solution is correct for
the lowest temperature expected. Refer to table 21.
2-19. Operation in Salt Water Areas
Caution: Before removing a generator set from
a. Salt water causes corrosive action on metal.
parallel operation, see that the load does not exceed
Care must be taken to avoid contact of
the full rating of the remaining set.
Warning: If necessary to move generator set,
stop remaining set or sets before detaching load
terminal wires or ground wires.
2-17
