Linkoln Electric POWER MIG 140 Manuel De L'opérateur page 19

POWER MIG 140 & 180 MODELS
C. Connect leads and cables on the machine
(See Figure B.14)
1. Open the case side door.
2. Slide the connector end of the gun and cable through the hole
of the machine front and into the gun connector bushing on
the wire drive.
3. Make sure the gun connector end is seated fully into the wire
drive and tighten the thumbscrew to secure the gun.
4. Plug the gun trigger lead connector into the 4 pin gun trigger
receptacle on the machine front.
5. Wire Drive Polarity. MIG welding requires Positive (+) polarity.
Connect the short power cable from the wire drive to the
positive (+) output terminal and tighten the thumbscrew.
6. Work Lead Connection. Slide the lugged end of the work
cable through the hole in the machine front and place on the
negative (-) output terminal and tighten thumbscrew.
FIGURE B.14
LOCATE COMPONENTS
TO CONNECT TO THE
FRONT OF MACHINE
THUMB SCREW TO
TIGHTEN CONNECTOR
BUSHING
D. Load Wire Spool
(See Figure B.15)
1. Locate the 4"(102mm) diameter spool of .025"(0.6mm) L-56
solid MIG wire and place onto wire spool spindle. Orient the
spool so that the wire feeds off the top of the spool.
2. Secure spool in place by tightening the wing nut against the
against the spacer that holds the wire spool on the spindle.
3. Open the top drive roll pressure arm by rotating the tension
adjustor arm down and pivoting the idle roll pressure arm up.
4. Remove the outer wire guide.
4a. Slide gun out of drive slightly.
5. Remove the lower drive roll and inner wire guide.
6. Install the .025"-.035"(0.6mm-0.9mm) inner wire guide.
7. Install the .025"(0.6mm) smooth grooved lower drive roll.
8. Carefully unwind and straighten the first six inches of welding
wire from the spool. Do not let the end of the wire go to
prevent the wire from unspooling.
TOP DRIVE ROLL PRESSURE ARM
(See Figure B.16)
9. Feed the wire through the wire drive inlet along the inner wire
guide groove and into the wire drive outlet on the gun side.
10. Close the top drive roll pressure arm and secure by pivoting
WORK LEAD
CABLE NEGATIVE "–"
the tension adjustor back to the up position.
OUTPUT TERMINAL
11. Re-install the outer wire guide.
SHORT POWER CONNECTION
POSITIVE "+" OUTPUT TERMINAL
B-10
FIGURE B.15
TENSION ADJUSTOR DOWN
INNER WIRE GUIDE REMOVED
LOWER DRIVE ROLL REMOVED
OUTER WIRE GUIDE REMOVED
OPERATION
WIRE SPOOL
.025" (0.6mm)
L-56 SOLID WIRE