Miller Electric OM-227 398D manual Replacing Head Tube Liner In XR-Aluma-Pro Guns

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

	. Turn OFF coolant supply before
		removing head tube	on
		water-cooled gun.
	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
3	tube liner with appropriate sized lin-
	er.
	1	Head Tube
	2	Head Tube Nut
2	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
1	tapered end first) and reinstall head
	tube onto gun.
	. A twisting motion may be need-
	Tapered end	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

5-7. Changing Gun Contact Tip

Remove nozzle 1 Nozzle

2 FasTip Unscrew FasTip. Install new 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).

Reinstall nozzle.

2

1

Ref. 804 709-A

OM-227 398 Page 16