A-8
INSTALLATION
LN-25X™
proceDUre to install Drive rolls anD
Wire GUiDes
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 maintenance
work.
1. Turn power off at the welding power source.
2. Release the idle roll pressure arm.
3. Remove the outer wire guide by turning the knurled
thumbscrews counter-clockwise to unscrew them from the
feedplate.
4. Rotate the triangular lock and remove the drive rolls.
5. Remove the inner wire guide.
6. Insert the new inner wire guide, groove side out, over the two
locating pins in the feedplate.
7. Install a drive roll on each hub assembly secure with the
triangular lock.
8. Install the outer wire guide by aligning it with the pins and
tightening the knurled thumbscrews.
9. Close the idle arm and engage the idle roll pressure arm. Adjust
the pressure appropriately.
pressUre arM aDjUstMent
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 maintenance
work.
The pressure arm controls the amount of force the drive rolls exert
on the wire. Proper adjustment of the pressure arm gives the best
welding performance.
Set the pressure arm as follows:
WARNING
WARNING
FIGURE A.3
1
2
Aluminum
FCAW
GMAW
4
5
6
3
Aluminum wires
between 1 and 3
Cored wires
between 3 and 4
Steel, Stainless wires between 4 and 6
UNLOCKED
POSITION
LOCKED
POSITION
