Lincoln Electric IM355 LN-9F GMA Wire Feeder - Manual (Page 56)

TROUbLESHOOTING
E-2 E-2
LN-9 GMA and LN-9F GMA Wire Feeder
PRObLEMS
(SYMPTOMS)
Drive rolls turn but wire will not feed,
or wire feeding is rough or uneven.
POSSIbLE AREAS OF
MISADJUSTMENT(S)
1. Check that the gun cable is not
kinked and/or twisted. Keep the
cable as straight as possible.
Inspect the cable and replace if
necessary.
2. Check for wire jammed in the gun
and cable. Remove wire from the
gun and cable - feed in new wire.
Note any obstruction. Replace the
gun and cable if necessary.
3. Check for incorrect drive rolls and
guide tubes, or incorrect drive roll
assembly or pressure setting. Be
sure the wire diameter being used
is stamped on the drive rolls and
guide
tubes. Replace if
necessary. Check for proper
pressure setting and assembly.
4. Check to see if the gun cable is
dirty. Clean the cable per manual
instructions.
5. Check for worn drive roll or idle
roll. Replace or reverse split drive
roll type.
6. Check to see if the electrode is
rusty and/or dirty. Replace the
electrode if it is rusty. If conditions
are extremely dirty or electrode is
old (solid wire only) put a wiper on
the wire before it enters the guide
tube. Use a piece of cloth or felt
saturated with "Pyroil B" held
around the wire with a light clamp.
7. Check for a worn nozzle liner.
Replace nozzle liner if necessary.
8. Check for partially flashed or
melted contact tip. Replace the
contact tip if necessary.
RECOMMENDED
COURSE OF ACTION
If all recommended possible
areas of misadjustment have
been checked and the problem
persists, contact your local
Lincoln Authorized Field Service
Facility.
WIRE FEEDING PRObLEMS
CAUTION
Observe Safety Guidelines
detailed in the beginning of this manual.
TROUbLESHOOTING GUIDE
If for any reason you do not understand the test procedures or are unable to perform the necessary
tests/repairs safely, contact the Lincoln Electric Service Department for technical troubleshooting
assistance before you proceed. Call 1-800-833-WELD or 216-383-2531.