Lincoln Electric K126-11 Innershield Operator's Manual page 20

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PROBLEMS
(SYMPTOMS)
No wire feed occurs when trigger is
pulled.
Sluggish wire feed when trigger is
pulled.
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your
Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.
TROUBLESHOOTING
Observe all Safety Guidelines detailed throughout this manual
POSSIBLE
1. Machine is switched off or
unplugged.
2. Out of wire
3. Contact tip burnback.
4. Fully or partially blocked gun
liner.
5. Bird nest
6. Defective trigger (contacts open
or dirty).
7. Defective trigger circuit in gun.
8. No motor voltage or current from
machine.
9. Contact tip size too small for wire
diameter used.
1. Drive roll is worn or galled.
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.
5. Gun cable is coiled/kinked.
6. Mechanical resistance to wire
feeding is too large
K126-[ ] INNERSHIELD® PRO
CAUSE
1. Switch on or plug in machine.
2. Install full spool of specified wire.
3. Replace contact tip.
4. Remove and clean or replace gun
5. Cut out bird nest, reload wire, and
6. Replace trigger assembly.
7. Disconnect gun from machine
8. See Troubleshooting section in
9. Replace contact tip with one that
1. Clean drive roll or replace drive
2. Increase wire feed speed.
3. Check for obstructions: Remove
4. See Troubleshooting section in
5. Remove all sharp curves from gun
6. If using a reverse bend gun tube,
CAUTION
RECOMMENDED
COURSE OF ACTION
liner .
check for proper wire alignment.
and check trigger circuit for
continuity.
welding machine's or wire
feeder's instruction manual.
is the correct size.
roll.
any wire shavings; remove kinked
wire; remove and clean or
replace gun liner.
welding machine's instruction
manual.
cable while welding.
try welding with a non reverse
bend product.
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