Lincoln Electric pmn manual Liner Removal and REPLACE- Ment, Table D.1

D-2 MAINTENANCE D-2

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.

TABLE D.1

			Fixed	Adjustable
			Nozzle	Nozzle
	Replacement	Size Stencilled	Gas Diffuser	Gas Diffuser
Diameter of	Liner Part	on End of	Part No.	Part No.
Electrodes Used	Number	Liner Bushing	(and Stencil)	(and Stencil)
.025-.030" Steel	KP1934-2	.030 (0.8 mm)	KP2026-3	KP2026-2
(0.6-0.8 mm)
.035-.045" Steel	KP1934-1	.045 (1.2 mm)	KP2026-3	KP2026-2
(0.9-1.2 mm)
3/64" Aluminum	KP1955-1	3/64" (1.2 mm)	KP2026-3	KP2026-2
(1.2 mm)

LINER REMOVAL, INSTALLATION AND TRIMMING INSTRUCTIONS FOR

MAGNUM 250L

7.Screw the gas diffuser onto the end of the gun tube and securely tighten. Be sure the gas diffuser is correct for the liner being used. (See table and dif- fuser 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

SET SCREW

BRASS CABLE CONNECTOR

1-1/4"

(31.8mm)

LINER

TRIM

LENGTH

SET SCREW

GAS DIFFUSER

NOZZLE INSULATOR (IF USED)

GAS NOZZLE

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 cutoff 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 sten- cilled appropriately for the wire size bing used.

5.Fully seat the liner bushing into the connector. tighten 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.

CAUTION

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

POWER MIG 215