Changing The Liner - Bernard T-Gun 450 Owner's Manual

7-4 Changing the Liner

NOTE: For guns equipped with direct plug-ins, Bernard or Euro
connector, the procedure is the same. On Miller style power pins,
liner is held captive by a guide cap with must be removed and
replaced with changing liner.
IMPORTANT: Ensure power supply is off and gun is removed from
feeder before proceeding.
1. Remove nozzle, contact tip and retaining head.
2. Using a 100 mm wrench, turn thread-in liner retainer
counterclockwise until liner is free from the power pin.
3. With gun straightened, grip conduit liner with pliers and
remove.
4. Feed replacement liner through gun using short strokes to
avoid kinking. Twist liner clockwise if necessary.
5. Using a 10 mm wrench, turn thread-in liner retainer in a
clockwise direction and tighten in power pin.
6. Push liner back into gun and hold in place.
7. Trim conduit liner with a 3/4" (19 mm) stick-out.
8. Remove any burr that may obstruct wire feed, especially on flat
wire type conduit liner.
9. Replace nozzle, contact tip and gas diffuser onto neck.
18 TG008-1.2
Figure 7-F
Figure 7-G
Figure 7-H