Lincoln Electric Magnum K115-1 Operator's Manual page 19

INNERSHIELD PRO & MAGNUM CLASSIC GUN
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 procedures or are unable to perform the maintenance or repairs safely, contact your
Lincoln Authorized Service Facility for technical troubleshooting assistance before you proceed.
WWW.LINCOLNELECTRIC.COM/LOCATOR
Observe all Safety Guidelines detailed throughout this manual
POSSIBLE
CAUSE
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
E-2
MAINTENANCE
RECOMMENDED
COURSE OF ACTION
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 continuity.
8. See Troubleshooting section in welding
machine's or wire feeder's 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
machine's 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.