Lincoln Electric IM994 RED-D-ARC LN-25 PRO EXTREME (CE) - Manual (Page 35)

ELECTRIC SHOCK can kill.
• Turn the input power OFF at the
welding power source before
installation or changing drive
rolls and/or guides.
• Do not touch electrically live
parts.
• When inching with the gun trigger, electrode
and drive mechanism are "hot" to work and
ground and could remain energized several
seconds after the gun trigger is released.
• Do not operate with covers, panels or guards
removed or open.
• Only qualified personnel should perform main-
tenance work.
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D-1 MAINTENANCE D-1
RED-D-ARC LN-25™ PRO DUAL POWER (CE)
WARNING
SAFETY PRECAUTIONS
ROUTINE MAINTENANCE
• Check weld cables, control cables and gas hoses
for cuts.
• Clean and tighten all weld terminals.
PERIODIC MAINTENANCE
• Clean drive rolls and inner wire guide and replace if
worn.
• Blow out or vacuum the inside of the feeder.
CALIBRATION SPECIFICATION
Flow Meter Validation
Tools required:
• Flow meter reference standard.
• Constant voltage DC welding power source (DC-
400, V-350, CV-400 or equivalent).
To verify the flow meter accuracy:
1. Turn power OFF.
2. Connect the Red-D-Arc LN-25™ PRO DUAL
POWER to the constant voltage DC welding power
source. The work lead of the Red-D-Arc LN-25™
PRO DUAL POWER must be connected to the
work terminal of the power source.
3. Connect a supply of CO
2
to the wire feeder. Do
not exceed the maximum inlet pressure of the wire
feeder.
4. Disconnect the shielding gas hose that connects to
the gun bushing.
5. Connect the shielding gas hose to flow meter refer-
ence standard.
6. Orient the Red-D-Arc LN-25™ PRO DUAL
POWER in a vertical position.
7. Turn power ON.
8. Adjust the flow meter on the Red-D-Arc LN-25™
PRO DUAL POWER to 40 scfh while pressing the
GAS PURGE button.
9. Measure the gas flow with the calibrated flow
meter while pressing the GAS PURGE button.
10. The measured flow rate should be between 35
and 45 scfh.
The Red-D-Arc LN-25™ PRO DUAL POWER flow
meter cannot be calibrated. If the flow meter reads
incorrectly, check for leaks or kinks in the gas hose.
Replace the flow meter if necessary.