Red-D-Arc LN25 PRO EXTREME Operator's Manual page 13

A-4
8. Connect the shielding gas hose to the new gun
bushing, if required.
9. Rotate the gun bushing until the thumb screw hole
aligns with the thumb screw hole in the feed plate.
Slide the gun receiver bushing into the wire drive
and verify the thumb screw holes are aligned.
10. Tighten the socket head cap screw 10 to 14 ft-lbs
(13.5 to 19.0 Nm).
11. Insert the welding gun into the gun bushing and
tighten the thumb screw.
FIGURE A.2
THUMB SCREW
GUN RECEIVER BUSHING
CONNECTOR BLOCK
SOCKET HEAD
CAP SCREW
GUN BUSHING, THUMB SCREW AND SET
SCREW
(See Figure A.2a For Code 12167)
The gun bushing is not interchangeable with other
bushings. It is designed to be mechanically mounted
in the feed plate and then bolted directly to the feed-
erʼs internal electrical welding buss bar. It accepts
Magnum Pro guns (Tweco #2 to #4). This bushing
should be removed only for service replacement. It is
secured to the feed plate with an S11604-10 set
screw torqued between 35 to 45 in.-lbs.
Tools required:
• 1/4" hex key wrench, (2) 3/4" Box Wrenches,
3/4" STD. Socket, Adjustable Torque Wrench
(Snap Type)
1. Turn power off at the welding power source.
2. Remove the welding wire from the wire drive.
INSTALLATION
OUTER WIRE GUIDE
LOOSEN TIGHTEN
RED-D-ARC LN25™ PRO EXTREME
3. Remove the welding buss bar from the gun bush-
ing assembly.
4. Remove the thumb screw from the wire drive.
5. Remove the welding gun from the wire drive.
6. Loosen set screw.
7. Remove the outer wire guide, and push the gun
bushing out of the wire drive. Because of the pre-
cision fit, light tapping may be required to remove
the gun bushing.
8. Disconnect the shielding gas hose from the gun
bushing.
9. Connect the shielding gas hose to the new gun
bushing.
10. Rotate the gun bushing until the thumb screw hole
aligns with the thumb screw hole in the feed plate.
Slide the gun bushing into the wire drive and verify
the thumb screw holes are aligned.
11. Tighten set screw 35 to 45 in-lbs. (3.95 to
5.08Nm).
12. Connect welding buss bar to gun bushing assem-
bly and tighten bolts to 33 to 44 Ft. Lbs. (44.8 to
59.7Nm).
13. Insert the welding gun into the gun bushing and
tighten the thumb screw.
FIGURE A.2a
THUMB SCREW
GUN BUSHING
ASSEMBLY
WELDING BUSS
BAR
SET SCREW
A-4
OUTER WIRE GUIDE
LOOSEN TIGHTEN