Harbor Freight Tools 91146 INSPECTION, MAINTENANCE, and Cleaning Welding GUN, Figure O

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4.To replace the 3 AMP Buss Fuse: Failure of the Welder to operate may be caused by a blown 3 AMP Fuse (7) as indicated by its melted wire strand within the Fuse. To replace the Fuse, unscrew and remove the Fuse Cap. Remove the old Fuse, and install a new 3 AMP Fuse. Then, replace the Fuse Cap.

5.When storing, make sure to store the Welder in a safe, clean, dry location out of reach of children and unauthorized users.

6.CAUTION! All maintenance, service, and repairs not listed in this manual are only to be attempted by a qualified service technician.

INSPECTION, MAINTENANCE, AND CLEANING - WELDING GUN

1. WARNING! Make sure the Power Switch (10) on the Welding Machine is in its “OFF” position. Unplug the Power from its electrical outlet, and allow the Welder to completely cool before performing any inspection, maintenance, or cleaning procedures. Note: Always ground the contact tip to insure that there is no residual energy in the Welder.

2.Before each use: Inspect the general condition of the Welding Gun. Check for damaged electrical wiring/gas hose, loose connections, cracked, burnt, or broken parts, and any other condition that may affect its safe operation. If abnormal noise or vibration occurs, have the problem corrected before further use.

Do not use damaged equipment.

3.Before each use: Clean welding spatter from the inside of the Gas Nozzle (100A) and spray with an anti-spatter fluid.

4.To replace the Gun Contact Tip: Cut off the welding wire at the Contact Tip (90A). Remove the Nozzle. Remove the old Contact Tip, and install a new Contact Tip. Then, replace the Nozzle. (See Figure O.)

CONTACT TIP (90A)

NOZZLE (100A)

FIGURE O

SKU 91146

For technical questions, please call 1-800-444-3353.

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Contents MIG Welder 250 AMP Unpacking Product SpecificationsGeneral Safety Rules Save this ManualPersonal Safety Electrical SafetyTool USE and Care Service Grounded Equipment Equipment with Three Prong Plugs GroundingCords Longer than 25’ should not be Used with this Welder SymbologyExtension Cords Specific Safety Rules Page Page SKU For technical questions, please call Figure D Product OverviewFigure E Back Panel ControlsTo Attach The Rear Wheels And Front Castor Wheels Assembly InstructionsTo Attach a Power Cord Plug To Install Welding Wire Spool And Adjust Wire Tension To Attach The Gun Power Cable And Ground Clamp CableWire Spool See Figures F To Install a Gas CylinderWelding Gun Duty Cycle And Overheating Figure JInterval Four Welding FeaturesTime Minutes Welding Figure N Troubleshooting Guide Welding MachineINSPECTION, MAINTENANCE, and Cleaning Welding Machine Troubleshooting Guide Welding GUN & Wire DriveFigure O INSPECTION, MAINTENANCE, and Cleaning Welding GUNFigure P Please Read the Following Carefully Assembly Diagram Welding Machine Parts List Welding MachineDescription Parts List Welding GUN201A Ground Clamp Cable not Shown 202A GAS Hose not Shown Assembly Diagram Welding GUNElectrical Schematic Welding Machine