TM 5-3431-201-10
(4) Electrical system. Before starting the engine,
b. Lubrication. In dusty or sandy areas, filters and
wipe the electrical component free of ice and
strainers must be cleaned more frequently than under
moisture.
Do not disturb the wiring as it
normal conditions. Clean all lubrication points before
becomes brittle with extreme cold. See that the
and after lubrication.
Be sure that all lubricant
batteries are fully charged at all times.
containers are tightly sealed and stored in an area as
free as possible from dust and sand.
Caution:
Operate the engine for one hour after
c. Fuel System. Take all necessary precautions to
adding water to the batteries to allow
keep dirt and grit out of the fuel tank.
the water to mix with the electrolyte
19. Operation Under Rainy or Humid Conditions
and prevent freezing.
When the welding machine is operated outside,
17. Operation in Extreme Heat
erect a shelter to protect the unit, when possible. If the
erection of a shelter is not practical, keep the machine
a. Engine.
covered with canvas. Remove the cover during dry
(1) Cooling system. Keep the cooling system free
periods, open all doors, and .allow the unit to dry. Keep
of rust and scale.
If necessary, add an
approved rust inhibitor. Clean and flush the
20. Operation in Salt Water Areas
cooling system at frequent intervals (par. 47) Do
a. General. Salt water causes corrosive action on
not use salt water in the cooling system except
in extreme emergency. Make sure the engine
metal.
Care must be taken to avoid contact of
thermostat is working properly. Inspect the V-
equipment with salt water. If contact is made, or if the
unit is exposed to salt spray, wash the unit with clean,
fresh water.
(2) Lubrication. Lubricate the engine in accordance
Caution:
with the current lubrication order.
The cooling system is not designed
(3) Fuel system. Do not fill the fuel tank to the top;
to use salt water. However, salt
allow sufficient room for the expansion of the
water may be used in an emergency.
fuel.
b. Protection. Coat all exposed polished surfaces
(4) Batteries. Inspect the electrolyte level of the
with an approved rustproofing material or cover parts
batteries daily. The electrolyte should be three-
with a thin coat of grease. All exposed nonpolished
eighths inch above the plates. Add water as
surfaces may be coated with a thin layer of grease.
necessary.
21. Operation at High Altitude
b. Welding Machine.
Make sure the welding
The welding machine is designed to operate at
machine is free of airflow restrictions. When operating
elevations up to 8,000 feet. To calculate specific
indoors, make provisions for adequate ventilation and
generator output capability above 8,000 feet, use the
the venting of exhaust fumes to the outside.
following formula:
18. Operation in Dusty and Sandy Areas
FORMULA
a. Protection. When the installation of the unit is
7% x actual altitude -5,000 x 5,000 ft rating
permanent, erect a protective cover for it. When a
1,000
temporary installation is made, take advantage of
= derating
natural barriers as much as possible. All doors and
EXAMPLE SOLUTION FOR 13,000 FT:
panels should be closed when unit is shut down. Keep
0.07 x 13,000 -5,000 x 3 kw = derating
the unit as clean as possible, paying special attention to
1,000
the grill.
0.07 x 8 x 3 kw = 1.68 kw derating
3 kw - 1.68 kw = 1.32 kw (derated power at 13,000 ft)
19