Lincoln Electric IM990 MAGNUM PRO 350 and 550 FUME GUNS - Manual (Page 13)

A-6 INSTALLATION
MAGNUM™ PRO 350 and 550 FUME GUNS
A-6
5. REMOVING THE FUME TUBE ASSEMBLY
(See figure A.7)
Figure A.7
• Loosen locking collar (counter clockwise, right-hand
threads) on fume tube. Gas diffuser may remain in
place.
• Slide the fume tube out of the gun handle.
• Slide the fume tube off of the gun tube.
• Fume tube removed.
CONNECT THE GUN TO THE WIRE
FEEDER
1. Make sure that the gun locking knob is loosened.
Insert the gun into the gun conductor block and
tighten the gun locking knob.
2. Make the gas connection from the feeder to the gun
(if required).
3. Plug the trigger harness into the gunʼs Y-connector.
Plug the trigger harnessʼ connector into the recep-
tacle on the front of the feeder.
CONNECT THE GUN TO THE FUME
COLLECTION SYSTEM
1. Speed setting for Lincoln Miniflex system: “High” is
preferred for maximum fume collection.
2. Automatic / Manual setting (where available): Set to
“Manual” mode so that fume collection system will
continue running after welding. This ensures maxi-
mum cooling of the gun. Fume collection system or
gate valve to the gun may be shut off or closed after
the gun has cooled for 10 minutes since the last
weld.
CONSUMABLE PARTS
Contact tips See Table A.3
Gas diffuser assembly KP2747-1
Gas nozzle assembly, 5/8 inch opening KP2743-2-62R
Fume collection nozzles See Figure A.6