Welding Operation - Lincoln Electric POWER-ARC 4000 SVM103-A Service Manual

B-9

WELDING OPERATION

GENERAL INFORMATION
WARNING
Do not touch electrically live parts or elec-
trodes with your skin or wet clothing.
Do not breathe welding fumes or gases.
Use ventilation or exhaust to remove weld-
ing fumes from the breathing area.
Keep flammable material away.
Wear eye, ear, and body protection.
The POWER-ARC 4000 generator/welder can deliver
from 70 to 125 amps of continuous welding output
current . Output can be adjusted by setting the cur-
rent control dial on the output control panel.
You can get maximum welding output by setting the
dial to 125 AMPS. At high current settings like this,
some output may decrease as the machine is used. If
you are welding for a long time, you may need to turn
the dial slightly upward to maintain the same results.
The numbers on the dial correspond to the average
amps needed to weld using specific Lincoln welding
rods. Table B.4, WELDING APPLICATIONS, gives you
the recommended dial settings based on the thick-
ness of the work and the size and type of rod you're
using.
TO USE THE POWER-ARC 4000 FOR WELDING:
1. Remove the flange nuts from the weld output ter-
minals and place the work and electrode welding
cables over the terminals.
Replace and tighten the flange nuts securely. Be
sure the connections are tight.
2. Select the appropriate electrode. See Table B.4,
WELDING APPLICATIONS, or the ELECTRODE
SELECTION GUIDE on the machine Output
Control Panel.
POWER-ARC 4000
OPERATION
3. Attach the work clamp securely to the work you
4. Insert the electrode into the electrode holder.
5. Set the current control dial to the desired output
6. Start the gasoline engine. See ENGINE OPERA-
7. Strike an arc and begin welding. For information
AFTER YOU FINISH THE WELD:
1. Stop the gasoline engine. See ENGINE OPERA-
2. Allow the electrode and work to cool completely.
3. Remove the work clamp from the work.
4. Remove any remaining piece of electrode from the
5. If you are finished using the POWER-ARC 4000 for
See Figure B.1.
are welding.
current.
TION in this section of the manual.
on welding techniques, see WELDING GUIDE-
LINES in this section of the manual.
TION in this section of the manual.
electrode holder.
welding, disconnect the welding cables from the
weld output terminals. Reattach the flange nuts
and leave them on the terminals.