Flex the cable over its entire length and again blow out
the cable. Repeat this procedure until no further dirt
comes out. If this has been done and feed problems
are experienced, try liner replacement, and refer to the
trouble shooting section on rough wire feeding.

LINER REMOVAL AND REPLACE-
MENT

NOTE: Changing the liner for a different wire size
requires replacement of the gas diffuser per Table D.1
to properly secure the different liner.

CAUTION

Fixed

Adjustable

Nozzle

Replacement

Size Stencilled Gas Diffuser Gas Diffuser

Diameter of

Liner Part

on End of

Part No.

Electrodes Used

Number

Liner Bushing (and Stencil) (and Stencil)

.025-.030" Steel

M16087-2

.030 (0.8 mm)

S19418-3

S19418-2

(0.6-0.8 mm)

.035-.045" Steel

M16087-1

.045 (1.2 mm)

S19418-3

S19418-1

(0.9-1.2 mm)

3/64" Aluminum

M17714-1

3/64" (1.2 mm)

S19418-3

S19418-1

(1.2 mm)

TABLE D.1

LINER REMOVAL, INSTALLATION AND TRIMMING
INSTRUCTIONS FOR
MAGNUM 250L

NOTE: The variation in cable lengths prevents the
interchangeability 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, if

used, to locate the set screw in the gas diffuser
which is used to hold the old liner in place. Loosen
the set screw with a 5/64" (2.0 mm) Allen wrench.

2. Remove the gas diffuser from the gun tube.

3. Lay the gun and cable out straight on a flat surface.

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.

4. Insert a new untrimmed liner into the connector end

of the cable. Be sure the liner bushing is stencilled
appropriately for the wire size bing used.

5. Fully seat the liner bushing into the connector. tight-

en the set screw on the brass cable connector. the
gas diffuser, at this time, should not be installed
onto the end of the gun tube.

6. With the gas diffuser still removed from the gun

tube, be sure the cable is straight, and then trim the
liner to the length shown in Figure D.1. Remove any
burrs from the end of the liner.

7. Screw the gas diffuser onto the end of the gun tube

and securely tighten. Be sure the gas diffuser is cor-
rect for the liner being used. (See table and diffuser
stencil.)

8. Tighten the set screw in the side of the gas diffuser

against the cable liner using a 5/64" (2.0 mm) Allen
wrench.

FIGURE D.1

This screw should only be gently tightened.
Overtightening will split or collapse the liner and
cause poor wire feeding.

SET SCREW

BRASS CABLE CONNECTOR

GAS DIFFUSER

NOZZLE INSULATOR (IF USED)

GAS NOZZLE

1-1/4"

(31.8mm)

LINER

TRIM

LENGTH

CAUTION