Miller 301571 Manuale d'uso - Pagina 19
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6-6. Replacing Head Tube Liner In XR-Aluma-Pro Plus Guns
2
1
6-7. Changing Gun Contact Tip
4
3
2
1
.
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
2
3
Loosen head tube nut and remove
head tube from gun.
4
Pull liner out of head tube.
Insert new liner into head tube (install
tapered end first) and reinstall head
tube onto gun.
Tapered end
.
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
Unscrew nozzle.
2
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).
.
Reinstall nozzle.
Turn OFF coolant supply before
removing
head
tube
on
water-cooled gun.
Nozzle Insulator
Head Tube
Head Tube Nut
Head Tube Liner
A twisting motion may be need-
ed to feed liner thru head tube.
Ref. T0090-A
Nozzle
Centerfire Contact Tip
Centerfire contact tips de-
signed for aluminum wire have
AL (Example T-.047AL) as a
designator at the end of the part
number.
Ref. 246347-A
OM-285555 Page 15