Firepower MST 140i, Operating Manual

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Firepower MST 140i
INSTALLATION, OPERATION AND SETUP 3-16 Manual 0-5338
3.12 Inserting Wire into the Wire Feed Mechanism
Release the tension from the Pressure Roller Arm by turning the adjustable Wire Drive Tension Screw in a counterclockwise.
Then to release the pressure roller arm push the tension screw toward the front of the machine which releases the pressure
roller arm. With the MIG welding wire feeding from the bottom of the spool (Figure 3-10) pass the electrode wire through
the inlet guide, between the rollers, through the outlet guide and into the MIG Gun. Re-secure the pressure roller arm and
wire drive tension screw and adjust the pressure accordingly (Figure 3-9). Remove the nozzle and contact tip from the MIG
Gun. With the MIG Gun lead reasonably straight, feed the wire through the MIG Gun by depressing the trigger switch. Fit the
appropriate contact tip.
WARNING
Before connecting the work clamp to the work piece, make sure you have ceased feeding wire so premature arcing
will not occur.
The electrode wire will be at welding voltage potential while it is being fed through the system.
Keep MIG Gun away from eyes and face.
Art # A-10359_AB
Outlet Guide
Inlet Guide
Wire Drive Tension Screw
Pressure Roller Arm
Figure 3-9: Wire Drive Assembly Components
MIG Welding Wire
Art # A-12442
Figure 3-10: MIG Welding Wire - Installation