Lincoln Electric IM10047 RED-D-ARC GX300 - Manual (Page 19)

B-3 OPERATION B-3
4. WELD OUTPUT TERMINALS WITH
FLANGE NUT:
Provides a connection point for the electrode and work
cables. Output stud covers provided on code 11274 and
above.
5. GROUND STUD:
Provides a connection point for connecting the machine
case to earth ground for the safest grounding procedure.
6. 14-PIN CONNECTOR:
For attaching wire feeder control cables to the GX 300.
Includes contactor closure circuit , auto-sensing remote
control circuit, and 120V and 42V power. The remote
control circuit operates the same as the 3-Pin connector.
7. 3-PIN CONNECTOR:
For attaching optional remote control equipment. When
in the CC-STICK, PIPE, and CV-WIRE modes and when
a remote control is connected to the auto-sensing circuit
in the GX 300 automatically switches the OUTPUT con-
trol from control at the welder to remote control.
When using the TOUCH START TIG mode with a TIG
Module connected to the GX 300, the OUTPUT control
on the front of the GX 300 is used to set the maximum
current range of the CURRENT CONTROL on the TIG
Module.
8. WELD TERMINALS CONTROL SWITCH:
In the WELD TERMINALS ON position, the output is
electrically hot all the time. In the REMOTELY CON-
TROLLED position, the output is controlled by a wire
feeder or amptrol device, and is electrically off until a
remote switch is depressed.
9. WIRE FEEDER VOLTMETER SWITCH:
Matches the polarity of the wire feeder voltmeter to the
polarity of the electrode.
ENGINE CONTROLS:
10. RUN/STOP SWITCH - RUN position energizes
the engine prior to starting. STOP position stops the
engine. The oil pressure interlock switch prevents battery
drain if the switch is left in the RUN position and the
engine is not operating.
11. CHOKE - When pulled out, it closes the choke
valve on the engine carburetor for quick starting.
12. START PUSH BUTTON - Energizes the starter
motor to crank the engine.
13. IDLER SWITCH - Has two positions as follows:
1) In the HIGH position, the engine runs at the high
idle speed controlled by the engine governor.
2) In the AUTO position, the idler operates as follows:
• When switched from HIGH to AUTO or after start-
ing the engine, the engine will operate at full
speed for approximately 12 seconds and then go
to low idle speed.
• When the electrode touches the work or power is
drawn for lights or tools (approximately 100
Watts minimum), the engine accelerates and
operates at full speed.
• When welding ceases or the AC power load is
turned off, a fixed time delay of approximately 12
seconds starts. If the welding or AC power load is
not restarted before the end of the time delay, the
idler reduces the engine speed to low idle speed.
• The engine will automatically return to high idle
speed when there is welding load or AC power
load reapplied.
14. ELECTRIC FUEL GAUGE/HOUR METER:
The electric fuel gauge gives accurate and reli-
able indication as to how much fuel is in the fuel
tank. The hour meter displays the total time that
the engine has been running. This meter is useful
for scheduling prescribed maintenance.
STARTING AND STOPPING THE ENGINE
• Remove all plugs connected to the AC power
receptacles.
• Set IDLER switch to AUTO.
• Set the RUN/STOP switch to RUN.
• Pull the choke to the full out position.
• Press and hold the engine START button until the
engine starts.
• Release the engine START button when the engine
starts.
• Push the choke back in.
• The engine will run at high idle speed for approxi-
mately 12 seconds and then go to low idle speed.
Allow the engine to warm up at low idle for several
minutes before applying a load and/or switching to
high idle. Allow a longer warm up time in cold
weather.
GX 300