Miller XR-A AlumaPro Plus 15 ft, Owner'S Manual

Page: 19 / 36

OM-245892 Page 15
6-6. Replacing Head Tube Liner In XR-AlumaPro Plus Guns
Ref. 804 544-B
.
Turn OFF coolant supply before
removing head tube on
water-cooled gun.
The standard head tube liner
(yellow) will accommodate wire
diameters from 3/64 in.- 1/16 in. wire
size.
When changing wire size, change
control box drive roll, idler and head
tube liner with appropriate sized
liner.
1 Head Tube
2 Head Tube Nut
Loosen head tube nut and remove
head tube from gun.
3 Head Tube Liner
Pull liner out of head tube.
Insert new liner into head tube (install
tapered end first) and reinstall head
tube onto gun.
.
A twisting motion may be need-
ed to feed liner thru head tube.
NOTICE − Be sure head tube is
seated and head tube nut is securely
tightened before operating gun. If
head tube nut is not adequately tight-
ened, unwanted arcing may occur
between head tube and gun housing.
1
2
3
Tapered end
6-7. Changing Gun Contact Tip
Ref. 246 347-A
2
1
1 Nozzle
Unscrew nozzle.
2 Centerfire Contact Tip
Remove contact tip.
Install new contact tip.
NOTICE − Make sure correct size
contact tip is being used. Incorrect
size may cause arcing inside tip,
poor feedability and poor arc start-
ing characteristics(see Section 9).
.
Centerfire contact tips de-
signed for aluminum wire have
AL (Example T-.047AL) as a
designator at the end of the part
number.
Reinstall nozzle.