Lincoln Electric IM10045 Innershield Pro Gun K126-10,11,12 - Manual (Page 20)

E-2 TROUBLESHOOTING E-2
K126-[ ] INNERSHIELD® PRO
Observe all Safety Guidelines detailed throughout this manual
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.
CAUTION
PROBLEMS
(SYMPTOMS)
POSSIBLE
CAUSE
RECOMMENDED
COURSE OF ACTION
No wire feed occurs when trigger is
pulled.
Sluggish wire feed when trigger is
pulled.
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. Machineʼs wire feed speed set-
ting 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
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
liner .
5. Cut out bird nest, reload wire, and
check for proper wire alignment.
6. Replace trigger assembly.
7. Disconnect gun from machine
and check trigger circuit for conti-
nuity.
8. See Troubleshooting section in
welding machineʼs or wire feed-
erʼs instruction manual.
9. Replace contact tip with one that
is the correct size.
1. Clean drive roll 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 liner.
4. See Troubleshooting section in
welding machineʼs instruction
manual.
5. Remove all sharp curves from gun
cable while welding.
6. If using a reverse bend gun tube,
try welding with a non reverse
bend product.