Lincoln Electric SVM170-A LINER REMOVAL, INSTALLATION AND TRIMMING INSTRUCTIONS FOR MAGNUM 250L

D-3 MAINTENANCE D-3

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TABLE D.1

				AdjustableNo. de Parte
	Replace	Size	Fixed Nozzle	nozzle Gas
				del Difusor de
			No. de Parte del
	ment	TamañoStencilledGrabadoon	GasDifusorDiffuserde Gas	Diffuser
	Número de			Gas de la
Diámetro de	Line	End of liner	Part No. (and	Part No.
	Parte de la	en el extremo del	de la Tobera Fija	Tobera ajustable
Diameter of	Part	Bushing	stencil)	(and
Electrode Used	Number	CilindrodelaGuía	(grabado)	Stencil)
s Utilizados	Guía			(grabado)
.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	KP2026-1B1
(0.9-1.2 mm)
3/64" Aluminum	KP1955-1	3/64" (1.2 mm)	KP2026-3	KP2026-1B1
(1.2 mm)

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 correct 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.

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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

cutoff length requirement. Liners are shipped with the

jacket of the liner extended the proper amount.

FIGURE D.1

SET SCREW

BRASS CABLE CONNECTOR

1-1/4"

(31.8mm)

1-1/4 (31,8 mm)

LONGITUD DE

LINER TRIM

CORTE

LENGTH

SET SCREW

GAS DIFFUSER

NOZZLE INSULATOR (IF USED)

GAS NOZZLE

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1.Remove the gas nozzle and nozzle insula- tor, 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 connector at the feeder end of the cable and pull the liner out of the cable.

4.Insert a new untrimmed liner into the con- nector end of the cable. Be sure the liner bushing is stencilled appropriately for the wire size being used.

Note: For liners KP1950-7, KP1950-8, KP1955-1 and KP1599-2

Before fully seating the liner bushing, it will be necessary to trim the liner’s inner tube flush with the liner bushing using a sharp blade. After trim- ming, remove any burrs from inner tube and insure that the opening is fully open.

5.Fully seat the liner bushing into the connec- tor. 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.

WARNING

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

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GUN HANDLE DISASSEMBLY

The internal parts of the gun handle may be inspected or serviced if necessary.

The gun handle consists of two halves that are held together with a collar on each end. To open up the handle, turn the collars approximately 60 degrees counterclockwise (the same direction as removing a right hand thread) until the collar reaches a stop. Then pull the collar off the gun handle. If the collars are difficult to turn, position the gun handle against a corner, place a screwdriver against the tab on the collar and give the screwdriver a sharp blow to turn the collar past an internal locking rib.

counterclockwise

POWER MIG 255C