Shielding Gas Connection; Changing The Drive Motor Gear Ratio - Lincoln Electric POWER FEED 25M Operator's Manual

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POWER FEED 25M & 25M ALUMINUM

SHIELDING GAS CONNECTION

WARNING
CYLINDER may explode if
damaged.
•Keep cylinder upright and
chained to support.
• Keep cylinder away from areas where it may be damaged.
• Never lift welder with cylinder attached.
• Never allow welding electrode to touch cylinder.
• Keep cylinder away from welding or other live electrical
circuits.
• BUILD UP OF SHIELDING GAS MAY HARM HEALTH OR KILL.
• Shut off shielding gas supply when not in use.
• See American National Standard Z-49.1, "Safety
in Welding and Cutting" Published by the
American Welding Society.
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M 100
AXIMUM INLET PRESSURE IS PSI
Install the shielding gas supply as follows:
1. Secure the cylinder to prevent it from falling.
2. Remove the cylinder cap. Inspect the cylinder valves and
regulator for damaged threads, dirt, dust, oil or grease. Remove
dust and dirt with a clean cloth. DO NOT ATTACH THE
REGULATOR IF OIL, GREASE OR DAMAGE IS PRESENT! Inform
your gas supplier of this condition. Oil or grease in the presence
of high pressure oxygen is explosive.
3. Stand to one side away from the outlet and open the cylinder
valve for an instant. This blows away any dust or dirt which may
have accumulated in the valve outlet.
4. Attach the flow regulator to the cylinder valve and tighten the
union nut(s) securely with a wrench. Note: if connecting to 100%
CO 2 cylinder, insert regulator adapter between regulator and
cylinder valve. If adapter is equipped with a plastic washer, be
sure it is seated for connection to the CO 2 cylinder.
5. Attach one end of the inlet hose to the outlet fitting of the flow
regulator. Attach the other end to the welding system shielding
gas inlet. Tighten the union nuts with a wrench.
6. Before opening the cylinder valve, turn the regulator adjusting
knob counterclockwise until the adjusting spring pressure is
released.
7. Standing to one side, open the cylinder valve slowly a fraction of
a turn. When the cylinder pressure gage stops moving, open the
valve fully.
8. The flow regulator is adjustable. Adjust it to the flow rate
recommended for the procedure and process being used before
making a weld.
. (6.9 .)
BAR

CHANGING THE DRIVE MOTOR GEAR RATIO

WARNING
• Turn off input power at the welding
power source before installation or
changing drive roll and/or wire guides.
• Do not touch electrically live parts such
as the wire drive or internal wiring.
• When feeding with the gun trigger, the
electrode and wire drive mechanism are
"hot" to work and ground and could
remain energized several seconds after
the gun trigger is released.
• Only qualified personnel should perform this operation.
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Extra
Torque
Gearing
400
Extra Torque
Gearing
Tools required:
• 1/4" hex key wrench
• 3/4" open end wrench
• 9/16" socket and ratchet wrench
• 7/16" nut driver
• 5/16" nut driver
• Phillips screw driver
1. Turn power off at the welding power source.
2. Remove the spool of electrode from the wire feeder.
3. Loosen the thumb screw at the wire drive and remove the welding
gun.
4. Remove the outer wire guide, drive rolls and inner wire guide.
5. Use a 7/16" nut driver to remove the gear cover.
6. Use 9/16" socket and ratchet wrench to remove the lower drive roll
hub retainer. Remove the lower drive roll hub.
7. With a Phillips screwdriver, remove the screw, washer and collar
holding the pinion gear. Remove the pinion gear.
A-5
INSTALLATION
Normal
Speed
Gearing
WFS
800
Normal Speed
Gearing