Lincoln Electric LF-72/74 AA-11, Changing the Gun Receiver Bushing, Guides, Et head cap screw

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AA-11		INSTALLATION			AA-11
WIRE DRIVE CONFIGURATION		7.		Disconnect the shielding gas hose from the gun
(See Figure AA.5)				bushing, if required.
Changing the Gun Receiver Bushing		8.		Connect the shielding gas hose to the new gun
				bushing, if required.
	WARNING
			9.	Rotate the gun bushing until the thumb screw hole
	ELECTRIC SHOCK can kill.			aligns with the thumb screw hole in the feed plate.

•Turn the input power OFF at the Slide the gun receiver bushing into the wire drive

welding power source before instal- and verify the thumb screw holes are aligned.

lation or changing drive rolls and/or	10. Tighten the socket head cap screw.
guides.	11. Insert the welding gun into the gun bushing and
• Do not touch electrically live parts.	tighten the thumb screw.
• When inching with the gun trigger, electrode and
drive mechanism are "hot" to work and ground
and could remain energized several seconds	Gun Receiver	For use With
after the gun trigger is released.	Bushing
• Only qualified personnel should perform mainte-
nance work.	K1500-1	K466-1 Lincoln gun connectors;
------------------------------------------------------------------------		Innershield and Subarc guns)
Tools required:
• 1/4" hex key wrench	K1500-2	K466-2, K466-10 Lincoln gun
Note: Some gun bushings do not require the use of		connectors; Magnum 200/300/400
the thumb screw.		guns and compatible with Tweco®
		#2 - #4)
1. Turn power off at the welding power source.
2. Remove the welding wire from the wire drive.	K1500-3	K1637-7 Lincoln gun connectors;
3. Remove the thumb screw from the wire drive.		Magnum 550 guns and compatible
4. Remove the welding gun from the wire drive.		with Tweco® #5)
5. Loosen the socket head cap screw that holds the
connector bar against the gun bushing. Important:	K1500-4	K466-3 Lincoln gun connectors;
Do not attempt to completely remove the sock-		compatible with Miller® guns.)
et head cap screw.
6. Remove the outer wire guide, and push the gun	K1500-5	(Compatible with Oxo® guns.)
bushing out of the wire drive. Because of the pre-
cision fit, light tapping may be required to remove	K489-7	( Lincoln Fast-Mate guns.)
the gun bushing.
FIGURE AA.5
		TIGHTEN
		CAP
GUN RECEIVER BUSHING		SCREW
		LOOSEN
		CAP
	THUMB	SCREW
	SCREW

CONNECTOR

BAR

SOCKET

HEAD CAP

SCREW

LF-72/74