Lincoln Electric 11937 Service Manual page 24

F-10
Observe Safety Guidelines detailed in the beginning of this manual.
PROBLEMS
(SYMPTOMS)
Low or no shielding gas flow.
Spool Gun runs or begins feeding
wire without pulling the gun
trigger.
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 1-888-935-3877.
TROUBLESHOOTING AND REPAIR
POSSIBLE AREAS OF
MISADJUSTMENT(S)
SPOOL GUN PROBLEMS
1. Out of gas.
2. Gas supply is turned off or
disconnected.
3. Gas supply flow regulator is
improperly set.
4. Machine's gas solenoid valve
has malfunctioned.
5. Blockage in gun along gas
path.
6. Gun cable kinked or flattened.
7. Blockage due to excessive
spatter accumulation on gas
cone or gas diffuser.
8. Excessive gas leakage from
supply.
9. Gas leakage in gun between
liner assembly and cable
connector.
10. Gas leakage at gun-to-feeder
connection.
1. Defective trigger (contacts
closed).
2. Defective (closed) trigger circuit
in the welding machine.
3. Trigger lead(s) inside gun
cable are shorted together or
commonly shorted to either
welding or motor circuits.
CAUTION
WIRE FEEDER WELDER (180 MODEL)
RECOMMENDED
COURSE OF ACTION
1. Check that an adequate gas
supply is available.
2. Check that all gas supply
valves are open.
3. Check that all gas flow is set
between 20 to 50 SCFH.
4. See machine's instruction
manual.
5. Gently blow out debris from
core tube.
6. Attempt to straighten out
cable, or replace cable. (See
Maintenance Section).
7. Clean or replace gas cone or
gas diffuser.
8. Find and repair all leaks.
9. Replace liner assembly. (See
Maintenance Section).
10. Damaged o-rings: replace
both seals. Gun connector
not fully inserted into
machine ( See Installation
Section).
1. Replace trigger (See
Maintenance Section).
2. See machine's instruction
manual.
3. Damaged control leads
between machine's P6
connector and cable; repair if
possible. Otherwise, replace
gun cable (See Maintenance
Section) for both.
F-10