Engine Operation; Welding Controls; Before Starting The Engine - Lincoln Electric RANGER 250 SVM150-A Service Manual

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WELDING CONTROLS

7. OUTPUT CONTROL: The OUTPUT dial provides
continuous control of the welding current or weld-
ing voltage depending on the selected welding
mode. This control is not active in the CC-STICK,
PIPE, and CV-WIRE modes when a remote con-
trol or wire feeder with remote control is connect-
ed to either the 6-pin or 14-pin Amphenol.
8. WELD MODE SELECTOR SWITCH: This switch
provides four selectable welding modes:
• CV-WIRE
• PIPE
• CC-STICK
• TOUCH START TIG
9. ARC CONTROL: The ARC CONTROL WIRE/
STICK dial is active in the CV-WIRE and CC-
STICK modes, and has different functions in
these modes. This control is not active in the TIG
and PIPE modes.
CC-STICK mode: In this mode, the ARC CON-
TROL sets the short circuit current during stick
welding (arc-force). Increasing the number from
-10 to +10 increases the short circuit current and
prevents sticking of the electrode to the plate
while welding. This can also increase spatter. It
is recommended that the ARC CONTROL be set
to the minimum number without electrode stick-
ing. Start with a setting at 0.
CV-WIRE mode: In this mode, turning the ARC
CONTROL clockwise from -10 (soft) to +10 (crisp)
changes the arc from soft and washed-in to crisp
and narrow. It acts as an inductance control. The
proper setting depends on the procedure and
operator preference. Start with a setting at 0.
10. 14-PIN AMPHENOL: For attaching wire feeder
control cables to the Ranger 250. Includes con-
tactor closure circuit, auto-sensing remote control
circuit, and 120V and 42V power. The remote
control circuit operates the same as the 6-pin
Amphenol. See below.
11. 6-PIN AMPHENOL: For attaching optional
remote control equipment.
STICK, PIPE, and CV-WIRE modes and when a
remote control is connected to the Amphenol, the
auto-sensing circuit in the Ranger 250 automati-
cally switches the OUTPUT control from control at
the welder to remote control.
When using the TOUCH START TIG mode, the
OUTPUT control on the front of the Ranger 250
sets the maximum current range.
OPERATION
12. WELD TERMINALS CONTROL SWITCH: In the
13. WIRE FEEDER VOLTMETER SWITCH: Matches

ENGINE OPERATION

DO NOT RUN THE ENGINE AT EXCESSIVE
SPEEDS. The maximum allowable high idle speed for
the Ranger 250 is 3750 RPM, no load. Do NOT adjust
the governor screw on the engine. Severe personal
injury and damage to the machine can result if it is
operated at speeds above the maximum rated speed.
Read and understand all safety instructions included in
the engine operator's manual that is shipped with your
Ranger 250.

BEFORE STARTING THE ENGINE

Check and fill the engine oil level:
1. Be sure the machine is on a level surface.
2. Open top engine door and remove the engine oil
3. Add oil (if necessary) to bring the level up to the full
4. See the Maintenance section for specific oil rec-
Check and fill the engine fuel tank:
When in the CC-
• Avoid contact with skin or breathing of vapor.
• Keep sparks and flame away from tank.
RANGER 250
WELD TERMINALS ON position, the weld output
is electrically hot all the time. In the REMOTELY
CONTROLLED position, the weld output is con-
trolled by a wire feeder or amptrol device, and is
electrically off until a remote switch is depressed.
the polarity of the wire feeder voltmeter to the
polarity of the electrode.
WARNING
dipstick and wipe it with a clean cloth. Reinsert the
dipstick and check the level on the dipstick.
mark. Do not overfill. Close engine door.
ommendations.
WARNING
GASOLINE can cause fire or
explosion.
• Stop engine when fueling.
• Do not smoke when fueling.
• Do not overfill tank.
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