Lincoln Electric POWER MIG SVM170-A Service Manual page 83

F-43
WIRE DRIVE ASSEMBLY REMOVAL AND REPLACEMENT (continued)
PROCEDURE
1. Disconnect main input power to the
machine.
2. Remove the wire gun and wire.
3. Lift the wire drive door to gain access to
the wire drive assembly.
4. Lift the tool tray door to allow access to
the tool tray.
5. Use a 5/16 in. nutdriver and remove the
tool tray to gain access to the
motor/gearbox assembly.
6. Disconnect the wire connectors J13
and J12 to the motor/gearbox assem-
bly. See Wiring Diagram.
7. Use a 3/4 in. wrench and remove the
flange nut and positive lead from the
wire drive assembly. See Figure F.12.
8. Use pliers to remove the hose clamp
and flex hose from the wire drive
assembly.
9. Remove the outer guide assembly from
the wire drive assembly by loosening
the thumb screws until the outer guide
can be removed.
10. Rotate the adjustment arm assembly
counterclockwise to release the tension
on the idle arm.
TROUBLESHOOTING AND REPAIR
POWER MIG 255C
11. Swing the idle arm up and away from
the wire drive assembly.
12. Use a screwdriver and remove the
round head screw, lock washer, and flat
washer securing the molded drive roll
shaft assembly to the wire drive assem-
bly.
13. Remove the molded drive roll shaft
assembly and the rest of the outer
guide assembly from the wire drive
assembly.
14. Use a screwdriver and remove the pan
head screws and lock washers secur-
ing the motor/gearbox assembly to the
wire drive assembly.
15. Grasp the motor/gearbox assembly and
wiggle the motor/gearbox assembly
gently back and forth until it separates
from the wire drive assembly.
16. Use a 7/16 in. nutdriver to remove the
hex head cap screws, lock washers,
and flat washers securing the wire
drive assembly to the wire drive
compartment.
17. Remove the wire drive assembly from
the wire drive compartment.
18. Reassemble the wire drive assembly in
the reverse order.
F-43