Lincoln Electric MAGNUM 300FM - Manual (Page 19)

TROUBLESHOOTING
MAGNUM® FAST-MATE™
Observe all Safety Guidelines detailed througout 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
FUNCTION PROBLEMS
PROBLEMS
(SYMPTOMS)
POSSIBLE CAUSE
RECOMMENDED
COURSE OF ACTION
1. Drive rolls turn, but wire will not
feed or wire feeding is rough.
2. Variable or “hunting” arc.
A. Gun cable kinked and/or twisted.
B. Wire jammed in gun and cable.
C. Incorrect drive rolls and guide
tubes.
D. Gun cable liner dirty.
E. Worn drive rolls.
F. Electrode rusty and/or dirty.
G.Worn or improper size cable
liner.
H. Partially flashed, melted, or
improper size contact tip.
A. Contact tip worn or incorrect
size.
B. Worn or undersize ground cables
or poor ground connections.
C. Loose electrode connections.
A. Keep as straight as possible.
Inspect cable and replace if nec-
essary.
B. Remove wire from gun and cable
– feed in new wire. Note any
obstruction. Replace liner if nec-
essary.
C. Be sure the wire diameter being
used is stamped on drive rolls
and guide tubes. Replace if nec-
essary.
D. Clean liner or replace.
E. Replace or reverse split drive roll
type.
F. Replace the electrode if it is
rusty.
G.Replace cable liner.
H. Replace the contact tip.
A. Replace contact tip.
B. Inspect – repair or replace as
necessary.
C. Be sure the following connec-
tions are tight: electrode cable to
wire feeder and power source,
work cable to power source and
work, gun cable to wire feeder
contact block, gun nozzle to
body, and contact tip to nozzle.
E-2 E-2