Lincoln Electric SVM 106-A Service Manual page 113

TROUBLESHOOTING AND REPAIR
GAS SOLENOID AND CONNECTIONS REPLACEMENT (continued)
REPAIR PROCEDURE
1. Remove the cover from the control box
by removing the four 5/16 in. screws
from the top and side of the unit.
2. Remove the tie wraps that secure the
gas solenoid wires to the wire feeder
main harness.
3. Disconnect the gas solenoid wires from
the control PC board at terminals #7
and #32A. Refer to Section G - Wiring
Diagrams. Feed the wires back through
wall of the control box and into the wire
drive compartment.
4. Remove the retaining nut from the gas
outlet fitting. Refer to Figure F.16.
Remove the gas tubing from the gas
outlet fitting. If necessary, cut the gas
tubing approximately one inch back
from the gas fitting and remove the gas
fitting. Remove the retaining nut and
lockwasher from the wire feeder. Slide
the tube sleeve off the gas tubing.
5. Remove the three 5/16 in. bolts that
attach the gas solenoid mounting plate
to the case of the wire feeder. Remove
the gas solenoid from the wire feeder.
6. Remove the gas inlet fitting and the
solenoid outlet fitting from the gas
solenoid. Remove the filter screen from
the inlet port of the solenoid.
7. Remove the solenoid from the solenoid
mounting plate by removing the two
phillips head screws from the bottom of
the mounting plate.
8. Remove the tubing from the gas and
solenoid outlet fittings. A knife may be
required to cut the tubing.
9. Mount the new solenoid to the solenoid
mounting plate using two phillips head
screws.
10. Apply thread sealant (part no. E-2442)
to the threads of the gas inlet fitting.
Place the filter screen in the inlet port of
the solenoid. Connect the new gas
fittings to the gas solenoid.
11. Attach an approximately 10 in. piece of
1/4 in. tubing to the solenoid outlet
fitting on the gas solenoid. Slide the
tube sleeve over the tubing.
12. Feed the gas tubing through the
mounting hole for the gas solenoid,
behind the wire drive gearbox, and
below the feed motor. Install the gas
solenoid onto the wire feeder using
three 5/16 in. bolts.
13. Place the retaining nut and lockwasher
on the gas tubing. Extend the gas
tubing out the mounting hole for the gas
outlet fitting and connect the tubing to
the new gas outlet fitting.
14. Install the gas outlet fitting into the wire
feeder case and secure with the
lockwasher and retaining nut.
15. Route the wires for the gas solenoid
through the hole in the case and into
the control box.
16. Connect the wires to terminals #7 and
#32A on the control PC board.
17. Secure the solenoid wires to the wire
feeder main harness using two tie
wraps.
18. Reinstall the cover on the control box
using four hex head screws.
LN-7 GMA WIRE FEEDER
F-49