Lincoln Electric 11937 Service Manual page 22

F-8
Observe Safety Guidelines detailed in the beginning of this manual.
PROBLEMS
(SYMPTOMS)
No wire feed occurs when Spool
Gun trigger is pulled.
Sluggish wire feed when the
Spool Gun trigger is pulled.
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely,
contact the Lincoln Electric Service Department for technical troubleshooting assistance before you proceed.
Call 1-888-935-3877.
TROUBLESHOOTING AND REPAIR
POSSIBLE AREAS OF
MISADJUSTMENT(S)
SPOOL GUN PROBLEMS
1. Machine is switched off or
unplugged.
2. Spool gun is out of wire
3. Contact tip burnback.
4. Fully or partially blocked gun
tube liner.
5. Bird nest.
6. Machine's toggle selector
switch is not set to spool gun
mode.
7. Defective trigger. (contacts
open)
8. Defective trigger circuit in gun.
9. Damaged spool gun motor.
10. No motor voltage or current
from machine.
11. Contact tip size too small for
wire diameter used.
1. Drive roll is worn or galled with
aluminum.
2. Machine's wire feed speed
setting is too low.
3. Wire is obstructed somewhere
along the wire feed path in the
gun.
4. Low motor voltage.
CAUTION
WIRE FEEDER WELDER (180 MODEL)
RECOMMENDED
COURSE OF ACTION
1. Switch on or plug in machine.
2. Install full spool of specified
wire.
3. Replace contact tip.
4. Replace and clean or
replace gun tube liner. ( See
Maintenance Section)
5. Cut out birds nest, reload
wire, and check for proper
wire alignment and wire's
mechanical resistance.
6. Flip switch to proper
operating position.
7. Replace trigger. ( See
Maintenance Section).
8. Disconnect gun from machine
and check trigger for
continuity.
9. See Troubleshooting
Section in welding machine's
instruction manual.
10. Replace contact tip with one
that is the right size.
1. Clean drive roll of all
aluminum or replace drive roll.
2. Increase wire feed speed.
3. Check for obstructions:
remove any wire shavings;
remove kinked wire; remove
and clean or replace gun
tube liner ( See Maintenance
Section).
4. See Troubleshooting
Section in welding machine's
instruction manual.
F-8