Harbor Freight Tools 61849 User Manual - Page 22

SAFETY SETUP BASIC WELDING Maintenance TO PREVENT SERIOUS INJURY, FIRE AND BURNS: Unplug the Welder, rest the Gun on a heat-proof, electrically non-conductive surface, and allow all parts of the Welder to cool thoroughly before service. 1. Periodically remove the Right and Left side panels, and using compressed air, blow out all dust from the interior. 2. Store in a clean and dry location. Gun + concrete slab (or other heat-proof, non-conductive surface) 3. For optimal weld quality, clean and inspect the Contact Tip and Nozzle before each use. See below. Nozzle Inspection, Cleaning, and Replacement 1. Make sure that the entire Gun is completely cool and that the Power Cord is unplugged from the electrical outlet before proceeding. 2. Turn the Nozzle counterclockwise while pulling to remove. 5. Reinstall the Nozzle after inspecting and cleaning the Contact Tip. Gun 3. Scrub the interior of the Nozzle clean with a wire brush. Nozzle 4. Examine the end of the Nozzle. The end should be flat and even. If the end is uneven, chipped, melted, cracked, or otherwise damaged, the Nozzle will adversely affect the weld and should be replaced. Contact Tip Contact Tip Inspection, Cleaning and Replacement 1. Make sure that the entire Gun is completely cool and that the Power Cord is unplugged from the electrical outlet before proceeding. 2. Remove the Nozzle as explained in the previous subheading. Turn the Contact Tip counterclockwise and slide it off the welding wire. 3. Scrub the exterior of the Tip clean with a wire brush. Clean out the inside of the Tip with a tip cleaner (sold separately). Check that the Tip is the proper type for the wire size used. The included 0.030" Tip is for 0.030" wire. Install a 0.035" Tip for use with 0.035" wire (both sold separately). 4. Examine the shape of the hole at the end of the Contact Tip. It should be an even circle; it should not be oblong or have any bulges in it. 5. If any problems are noted, Contact Tip replacement would be advisable. Make sure to select a new Tip that is the correct size for the welding wire used (0.030" Tip for 0.030" wire - 0.035" Tip for 0.035" wire). 6. Reinstall the Tip and securely reinstall the Nozzle as well. Gun Nozzle Contact Tip WELDING TIPS MAINTENANCE Page 22 For technical questions, please call 1-888-866-5797. Item 61849