Troubleshooting & repair, Procedure – Lincoln Electric WIRE-MATIC 255 SVM 119-A Manuel d'utilisation
Page 81
F-30
TROUBLESHOOTING & REPAIR
F-30
WIRE-MATIC 255
PROCEDURE
1.
Disconnect main input power to the
machine.
2.
Remove the Case Top and Side
Panels.
3.
Using the 5/16” Nutdriver remove
the gear box top cover.
4.
Remove the two sheet metal screws
located on the left rear side of the
gear box housing using a 5/16” nut-
driver.
5.
Remove the drive roll. See Figure
F.11.
a.
Remove the thumb screw, drive
hub, and the spacer.
6.
Remove the screw holding the gun
connector assembly to the Case
Front Panel. See Figure F.11.
7.
Slide the entire wire drive assembly
carefully toward the Case Back and
approximately 2” (51 mm) away
from the center baffle to gain access
to the drive motor and wiring.
a.
The gas hose and gun connec-
tor leads will limit the travel dis-
tance.
8.
Disconnect the drive motor from the
drive roll assembly.
a.
Remove the three large phillips
head screws on the outboard
side of the drive roll assembly
face plate using a phillips head
screw driver.
9.
Separate the drive roll assembly
from the drive motor.
a.
Grip the drive motor in one hand
and the drive assembly in the
other hand.
b.
Wiggle the drive motor and drive
assembly gently back and forth
until the two parts separate.
FIGURE F.11 - Wire Drive Assembly
Removal
10. Disconnect molex plugs J15, J12,
and J11. See wiring diagram.
11. Remove the drive roll assembly.
a.
Remove the two screws mount-
ing the drive roll assembly to the
insulator board using a 5/16” nut
driver.
b.
Loosen the set screw using a
slot head screwdriver that holds
the outgoing guide tube into the
drive roll assembly.
c.
Remove the drive assembly by
sliding it off the out going guide
tube and towards the Case
Back at the rear of the machine.
WIRE DRIVE ASSEMBLY REMOVAL AND REPLACEMENT (CONTINUED)