Matco Tools MP200DVILCD Owner's Manual page 10

a. Open the door to the welder drive compartment.
b. Remove the drive tension by loosening the Drive Tension Adjuster (1) and moving the
Drive Tension Adjustor away from the Drive Tension Arm (2). Lift the Drive Tension Arm
away from the Drive Roller (3).
c. If there is wire already installed in the welder, roll it back onto the wire spool by
hand-turning the spool clockwise. Be careful not to let all the wire come out of the rear
end of the inlet guide tube. Hold onto it or the wire spool will unspool itself. Put the end
of the wire into the hole on the outside edge of the wire spool and bend it over to hold
the wire in place. Remove the spool of wire from the drive compartment of the welder.
d. Remove the drive roller by turning the drive roll knob (3) counter-clockwise. Carefully slide
the drive roll assembly off of the drive shaft. This drive roll assembly consists of three
pieces. The outer drive roll, inner drive roll, and a key. Be careful not to misplace the
key.
e. Based on the wire diameter, select the correct groove. When installing the drive roller, the
number stamped on the drive roller for the wire size you are using should be facing you.
Push the Drive Roller onto the Drive Roller Shaft.
f. Reinstall the Drive Roller knob and tighten clockwise.
g. Close the door to the welder drive compartment.
Electrical Shock

Electric shock can kill! Always turn the POWER switch OFF and unplug the power cord
from the AC power source before installing wire.
NOTE: Before installing, make sure that you have removed any old wire from the torch
assembly. This will help to prevent the possibility of the wire jamming inside the gun liner.
NOTE: Be very careful when removing the welding nozzle. The contact tip on this welder is live
whenever the torch trigger is pulled. Make certain power is turned OFF.
5. INSTALL THE WIRE - We recommend the usage of .023, .030 & .035 MIG wire, or .030 and
.035 flux core wire, on this unit.
a. Select welding wire - Both four-inch or eight-inch wire spools of .023, .030, or .035 wire
can be used on this welder.
NOTE: Burn-through can occur if you attempt to weld mild or stainless steel thinner than
24 gauge.
NOTE: Remove all rusted wire from your wire spool. If the whole spool is rusty,
discard it.
b. Installing the wire.
i. Remove the nozzle and contact tip from the end of the torch assembly. See
Figure 3.
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