Replacing Head Tube Liner In Xr-Aluma-Pro Guns; Changing Gun Contact Tip - Miller Electric OM-227 398D Owner's Manual

5-6. Replacing Head Tube Liner In XR-Aluma-Pro Guns

1

5-7. Changing Gun Contact Tip

OM-227 398 Page 16
3
2
2
1
.
The standard head tube liner will ac-
commodate wire diameters from
.030-.035 wire size.
When changing wire size, change
control box drive roll, idler and head
tube liner with appropriate sized lin-
er.
1
2
Loosen head tube nut and remove
head tube from gun.
3
Pull liner out of head tube.
Insert new liner into head tube (install
tapered end first) and reinstall head
tube onto gun.
.
Tapered end
.
Remove nozzle
1
2
Unscrew FasTip.
Install new FasTip.
.
Reinstall nozzle.
Turn OFF coolant supply before
removing head tube on
water-cooled gun.
Head Tube
Head Tube Nut
Head Tube Liner
A twisting motion may be need-
ed to feed liner thru head tube.
Be sure head tube is seated and
head tube nut is securely tight-
ened before operating gun. If
head tube nut is not adequately
tightened, unwanted arcing may
occur between head tube and
gun housing.
Ref. 804 544-B
Nozzle
FasTip
Make sure correct size con-
tact tip is being used. Incor-
rect size may cause arcing in-
side tip, poor feedability and
poor arc starting characteris-
tics(see Section 9).
Ref. 804 709-A