control from the circuit to permit engine to
d. Fue/ Level Gauge. Indicates the quantity
operate at governed rpm when using welding
of fuel remaining in the fuel tank.
generator as an auxiliary power generator.
e. Choke. Restricts the flow of air into the
o. Panel Lights Switch. Opens or closes the
carburetor causing a rich mixture of air and
24-volt dc circuit to the instrument panel
gasoline to facilitate starting the engine,
lights.
f'. Magento Switch. Opens the magneto
p. Welding Generator Ammeter. Indicates
ground, thus, permitting the spark plugs to
the output current of the welding generator.
receive the high current from the magneto.
q. Welding Generator Voltmeter. Indicates
When in the off position, it shorts out the
the output voltage of the welding generator.
magneto coil and stops the engine.
r. Auxiliary Generator Ammeter. Indicates
g. Engine Start Switch. When depressed,
the output current of the auxiliary generator
completes the circuit from the battery to the
(exciter).
starter solenoid, energizing the solenoid which
connects battery power to the starter.
the output voltage of the auxiliary generator
h. Hold Down Switch. Disconnects the oil
(exciter).
pressure shutdown switch and the water tem-
t. Shutter Control. Controls the flow of air
perature shutdown switch to facilitate start-
through the welding machine enclosure when
ing- the engine.
the side doors are closed.
i. Job Selector. Varies the open-circuit volt-
u. Fuel Shut-Off Valve. Controls the flow of
age of the welding generator.
fuel from the tank to the engine carburetor.
j. Current Control. Varies the current output
v. Elasped Time Meter. Cumulatively indi-
of the welding generator.
cates the number of operating hours of the
k. Polarity Switch. Controls the polarity of
engine.
t h e electrode. Electrode polarity may be
O. Heater Indicator. (Model LEW 300). In-
switched from positive to negative as required.
dicates when the coolant heater is operating.
l. Auxiliary Generator Circuit Breaker.
x. Heater Switch. (Model LEW 300). Opens
Opens or closes the 115 volt de circuit to the
or closes the 24 volt de circuit to the heater.
auxiliary outlets,
y. Cold Weather Starting Aid. (Model LEW
m. Remote Switch. Switches the control of
300). Contains a capsule of ether that is punc-
the open circuit voltage of the welding gen-
tured by pulling the starting aid handle down.
erator from the current control on the instru-
This action sprays the ether into the air intake
ment panel to the remote current control.
manifold to facilitate quick starting.
n. Idle Control Switch. Disconnects the idle
Section IV. OPERATION UNDER USUAL CONDITIONS
tenance checks and services in accordance with
2-11. General
a. The instructions in this section are pub-
lished for the information and guidance of the
(2) Open fuel shut-off valve.
personnel responsible for the operation of the
b. Starting the Engine.
welding machine.
(1) Pull out choke knob if necessary to
b. The operator must know how to perform
facilitate starting.
every operation of which the welding machine
(2) Refer to figure 2-5 to start engine.
is capable. This section gives instructions on
starting, stopping and various operations of
Caution: Do not use start switch for
the welding machine. Since nearly every job
more than 30 seconds at a time without allow-
presents a different problem, the operator may
ing two minutes for the motor to cool between
have to vary given procedures to fit the indi-
cranking periods.
vidual job.
(3) When engine starts, push choke knob
in. If engine stalls, restart engine and push
2-12. Starting
choke knob halfway in. Adjust slowly as en-
a. Preparation for Starting.
gine temperature rises.
(1) Perform the daily preventive main-
AGO 20030A
