Lincoln Electric SVM154-A Service Manual page 59

F-14
Observe all Safety Guidelines detailed throughout this manual.
PROBLEMS
(SYMPTOMS)
The wire is feeding rough or not
feeding, but the drive rolls are
turning.
The contact tip seizes in the gun
liner.
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 1-800-833-9353.
-----------------------------------------------------------------------------------------------------------------------------
TROUBLESHOOTING AND REPAIR
POSSIBLE AREAS OF
MISADJUSTMENT(S)
FEEDING PROBLEMS
1. Check for mechanical restric-
tions in the wire feed path.
2. Make sure the gun liner is cor-
rect for the electrode wire being
used.
3. Check the contact tip.
4. Make sure the drive rolls are
installed correctly.
5. Make sure the DIP switches on
the control board are set
correctly. See Wire Drive Head
Selection.
1. The tip may be overheated
because of prolonged or
excessive high current and/or
duty cycle.
CAUTION
RECOMMENDED
COURSE OF ACTION
1. If the drive rolls are turning
1. Apply a light coating of high
LN-10
erratically perform the Wire
Drive Motor Test and Tach
Adjustment and Feedback
Test.
temperature anti-seize lubri-
cant-graphite grease to the tip's
threads.
F-14