Liner Removal And Replacement; Liner Removal, Installation, And Trimming Instructions For Magnum 250L - Lincoln Electric WIRE-MATIC 255 SVM 119-A Service Manual

D-4
LINER REMOVAL AND
REPLACEMENT
NOTE: When you change wire size, a replacement
gas diffuser is required. Use the table below to select
the proper diffuser so the liner is held securely in place.
Diameter of Replacement Liner
Electrodes Used
.025-.030" Steel
(0.6-0.8mm)
.035-.045" Steel
(0.9-1.2mm)
3/64" Aluminum
(1.2mm)
LINER REMOVAL, INSTALLATION,
AND TRIMMING INSTRUCTIONS
FOR MAGNUM 250L
NOTE: The variation in cable lengths prevents the
interchange ability of liners between guns. Once a liner
has been cut for a particular gun, it should not be
installed in another gun unless it can meet the liner cut
off length requirement. Liners are shipped with the
jacket of the liner extended the proper amount.
1. Remove the gas nozzle and nozzle insulator.
2. Locate the set screw in the gas diffuser which is
used to hold the old liner in place.
3. Loosen the set screw with a 5/64" (2.0mm) Allen
wrench.
4. Remove the gas diffuser from the gun tube.
5. Lay the gun and cable out straight on a flat sur-
face.
6. Loosen the set screw located in the brass connec-
tor at the feeder end of the cable and pull the liner
out of the cable.
7. Insert a new untrimmed liner into the connector
end of the cable.
a. Check the liner bushing stencil to make sure it
is the appropriate one for the wire size being
used.
MAINTENANCE
Size Stenciled on
Part Number End of Liner
Bushing
M16087-2 .030 (0.8mm)
M16087-1 .045 (1.2mm)
M17714-1 3/64" (1.2mm)
WIRE-MATIC 255
Fixed Nozzle Gas
Diffuser Part No.
(and Stencil)
S19418-3
S19418-3
S19418-3
8. Fully seat the liner bushing into the connector.
9. Tighten the setscrew on the brass cable connector.
NOTE: Do not install the gas diffuser onto the end of
the gun tube at this time.
10. Straighten the cable with the gas nozzle and noz-
zle insulator removed from the gun tube.
11. Trim the liner to the length shown in FIGURE D.2.
SET SCREW
BRASS CABLE CONNECTOR
GAS DIFFUSER
NOZZLE INSULATOR
FIGURE D.2 - Liner maintenance.
D-4
Adjustable Nozzle
Gas Diffuser Part
No. (and Stencil)
S19418-2
S19418-1
S19418-1
1-1/4" (1.25)
(31.8MM)
LINER TRIM
LENGTH
GAS NOZZLE