6
LIGHTNING
®
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6
NOZZLE AND CONTACT TIP SYSTEMS
IMPORTANT
Shock washer must be in place before welding to maintain insulation of
gooseneck. Be sure all parts are tightened will before welding.
When using the heavy duty retaining head make sure it is tightened with
a 11/16” wrench to prevent overheating of contact tip.
To prevent scoring on heavy duty retaining head do not use pliers.
REMOVAL AND REPLACEMENT
Pull slip-on nozzles off with a clockwise twisting motion.
When installing nozzle, exposed insulator should nest inside shock
washer to assure concentricity.
Shock washers are positioned on the end of the gooseneck with
the large insulated counterbore facing the nozzle.
Replace nozzle retainer with deep counterbore toward the gooseneck.
Tighten until retainer and shock washer are secure.
THREAD-ON (OPTIONAL FOR TWECO HD)
Thread-on nozzle system does not require nozzle retainer and
cannot be used with heavy duty head.
Shockwasher must be in place.
External gooseneck thread can be cleaned with a 9/16”-18 die.
1.1 LINER REPLACEMENT
TOOLS REQUIRED
Vise
5/64 Allen wrench
Lineman pliers
1. Remove nozzle, contact tip and tip holder from gooseneck. (Not shown)
2. With gun straightened, loosen liner set screw on quick connect power
pin at back end of gun using a 5/64” Allen wrench. (See Figure 1)
3. Using pliers, grip liner and remove from gun.
4. Install new liner by feeding through gun. Use short strokes to avoid kinking.
Use clockwise rotation as needed.
5. Be sure o-rings on liner head seats into inside bore of power pin.
6. Tighten set screw on power pin to secure liner. Do not overtighten.
Nozzle (Copper)
Contact Tip HD
Contact Tip HD Tprid
Diffuser Assy. 500A
NOTE: Any of the above nozzle and contact tip systems can be used on the LIGHTNING
GUN 50 AMP models. (See chart page 3)
