Systematics , Inc. 1025 Saunders Lane West Chester, PA. 19380
5
FITTING AND THREADING THE ELEC-
TRODE WIRE - ALWAYS USE ER70S-6
WELDING WIRE
1. Remove the wire spool clip from
the spool hub.
2. Unpack the spool of welding
wire from its protective pack-
aging.
3. Place the spool of ER70S-6
welding wire onto the hub. The
wire is fed off the bottom of
the spool.
Look for and remove any
wire protruding from the
center of the spool. The
protruding wire is elec-
trically HOT during weld-
ing and must not touch
the machine.
4. Replace the spool clip on the
hub.
5. Unlatch the pressure roll arm
and swing it open.
6. Make sure the double v-groove
drive roll is installed to
match the wire size. To change
the wire size setting, remove
the drive roll, turn it over and
reinstall it on the shaft.
(continued on following page)
SHIELDING GAS CONNECTIONS(Cont.)
4. Fit the gas hose from the
welding machine to the regula-
tor outlet fitting and tighten
it with a suitable wrench. Open
the cylinder valve.
5. Check that the gas regulator is
properly adjusted. When weld-
ing steel, the gas flow rate is
30 CFH. When welding aluminum,
the gas flow rate is 40 CFH.
NOTE
The MP140 must be turned
"ON" and the MIG torch
trigger depressed, before
the gas flow rate can be
adjusted.
TORCH CONNECTION
1. Open the access door of the
machine to its fullest extent.
2. Back out the thumb screw lo-
cated on the drive assembly
mounting bracket inside the
machine. Insert the MIG torch
into the torch panel mount on
the front panel and TIGHTEN THE
THUMB SCREW.
CAUTION
FIG. 5. DOUBLE GROOVE DRIVE ROLL
"A" SIDE FACING IN FOR
.023" - .035" STEEL WIRES
"B" SIDE FACING IN FOR
.040" - .045" STEEL WIRES
AND 3/64" ALUMINUM WIRES
TORCH
PRESSURE
PANEL
ROLL
MOUNT
MIG
TORCH
THUMB
SCREW
DRIVE
DRIVE
ROLL
ASSEMBLY
FIGURE 4. TORCH CONNECTION