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OM-923 Page 14 OM-923 Page 15 4-7. Threading Welding Wire 1 Wire Spool 2 Welding Wire 3 Inlet Wire Guide 4 Pressure Adjustment Knob 5 Drive Roll 6 Gun Cable Lay gun cable out straight. Tools Needed: Pull and hold wire; cut off end. 4 in (102 mm) Remove gun nozzle and contact tip. Open pressure assembly. Push wire thru guides into gun liner; continue to hold wire. Hold wire tightly to keep it from unraveling. 804 123-A WOOD Feed wire to check drive roll pressure. Tighten knob enough to prevent s