240 Volt arc/TIG INVERTER welder and Tig Welding Torch Model 66787 Set up And Operating Instructions Visit our website at: http://www.harborfreight.com Read this material before using this product. Failure to do so can result in serious injury. Save this manual. Copyright© 2009 by Harbor Freight Tools®. All rights reserved. No portion of this manual or any artwork contained herein may be reproduced in any shape or form without the express written consent of Harbor Freight Tools.
contents IMPORTANT SAFETY INFORMATION............................................................................3 General Safety Rules...........................................................................................3 Specific Safety Rules...........................................................................................5 PRODUCT SPECIFICATIONS.........................................................................................9 UNPACKING................................................
Save This Manual NOTICE is used to address practices not related to personal injury. Keep this manual for the safety warnings and precautions, assembly, operating, inspection, maintenance and cleaning procedures. Write the product’s serial number in the back of the manual (or month and year of purchase if product has no number). Keep this manual and the receipt in a safe and dry place for future reference.
b. Do not expose power tools to rain or wet conditions. Water entering a power tool will increase the risk of electric shock. c. Do not abuse the cord. Never use the cord for pulling or unplugging the power tool. Keep cord away from heat, oil, sharp edges or moving parts. Damaged or entangled cords increase the risk of electric shock. d. When operating a power tool outdoors, use an extension cord suitable for outdoor use. Use of a cord suitable for outdoor use reduces the risk of electric shock. 3.
. Service 5. Avoid eye and body damage. Arc rays and infrared radiation can injure eyes and burn skin. Wear ANSI approved eye and body protection. Do not allow viewing by visitors without proper eye and body protection. Use a Face Shield with arc shaded filter plate. 6. Move flammable and explosive material at least 35 feet from the welding arc to prevent welding sparks or molten metal from starting a fire. Keep a type ABC fire extinguisher within easy reach.
• Avoid operating alone. • Do not use with power switch locked on. • Properly maintain and inspect to avoid electrical shock. • Any power cord must be properly grounded. Ground Fault Circuit Interrupter (GFCI) should also be implemented – it prevents sustained electrical shock. 13. WARNING: This product, when used for welding, produces chemicals known to the State of California to cause cancer and birth defects (or other reproductive harm). (California Health & Safety Code § 25249.5, et seq.) 14. injury.
proved method for eliminating the hazard. • Do not dispose of hot slag in containers holding combustible materials. Keep a fire extinguisher nearby and know how to use it. • After spot welding, make a thorough examination for evidence of fire. Be aware that easily-visible smoke or flame may not be present for some time after the fire has started. Do not weld or cut in atmospheres containing dangerously reactive or flammable gases, vapors, liquids, and dust.
tions for the specific welding or cutting situation. 21. WARNING: Handling the Power Cord on this product will expose you to lead, a chemical known to the State of California to cause cancer, birth defects, and other reproductive harm. Wash hands after handling. (California Health & Safety Code § 25249.5 et seq.) WARNING 23. The warnings, precautions, and instructions discussed in this instruction manual cannot cover all possible conditions and situations that may occur.
Torch Assembly Specifications Electrical Requirements Output Amperage Range Maximum Open Circuit Voltage 240V~ / 60 Hz / 25A max. Power Cord: SJT 12AWG x 3C Power Plug: 3-Prong, 240 VAC (Not Included) 1. 10-130 Amps (Front) 61V 40% @ 130 Amps 60% @ 120 Amps 100% @ 80 Amps Duty Cycle Maximum Welding Capacity Electrode Diameter Capacity Electrode Holder Head Ground Cable Torch Cable Length Handle 2. Thread either Rod Holder (2a) or Plug (6a) securely into back of Torch (1a). 3.
WELDER FEATURES 1. Electrode Holder (8): Connect the Electrode Holder Cable to the POSITIVE Terminal located at the front of the Welder. (See Figure A.) 2. Ground Clamp (9): Connect the Ground Clamp Cable to the NEGATIVE Terminal located on the front of the Welder. (See Figure A.) 3. Potentiometer Dial (4): Turn the Dial clockwise or counterclockwise to regulate the welding current (from 10 to 130 amps). (See Figure B.) 4.
Operating Instructions Read the entire Important Safety Information section at the beginning of this manual including all text under subheadings therein before set up or use of this product. Work Piece and Work Area Set Up 1. Designate a work area that is clean and well-lit. The work area must not allow access by children or pets to prevent injury and distraction. 2.
Protective gear must be worn when using the Welder; ANSIapproved, arc shaded, eye 3. protection, a full face shield, heavy duty work gloves, a welding apron, respirator, and heavy-duty work clothes 4. without pockets should be worn when using this product. Do not look at the ignited 5. arc without eye protection. Light from the arc can cause permanent damage to the eyes. Light from the arc can burn the skin. Do not breathe arc fumes. 1.
Wear a NIOSH-approved respirator to avoid breathing arc fumes. 11. Stroke the area to be welded with the Electrode to ignite the arc. Never tap the Electrode into the welding surface to ignite the arc. This damages its external coating on the Electrode which prevents oxygen in the air from coming into contact with the molten metal, causing it to oxidize. of children and other unauthorized persons. 18.
To prevent serious injury from tool failure: Do not use damaged equipment. If abnormal noise or vibration occurs, have the problem corrected before further use. grounded, 240 V~, GFCI-protected receptacle and turn the Welder on. 5. Turn the Gas Flow Knob on the torch counterclockwise to allow the shielding gas to flow. 6. Tilt the torch forward, towards the workpiece. Keep a constant distance between the torch and the workpiece but do not contact it. 7.
TROUBLESHOOTING Problem Possible Cause(s) Welder will not turn on. 1. No power at electrical outlet. 2. Power Cord not connected. 3. Line voltage incorrect. No weld output with ready light on. 1. Weld Cable loose. 2. Improper Ground Clamp-toworkpiece connection. No weld output with high temperature light on. 1. Welder overheated. 2. Duty cycle or amps too high. 3. Airflow is blocked. Likely Solution(s) 1. Check power at electrical outlet. 2. Check that Power Cord is plugged in. 3.
WELDER Parts list and assembly diagram Part # Description Qty. Part # Description Qty. 1 Housing 1 11 Transformer 1 2 Strap 1 12 Heat Sink 3 3 Potentiometer 1 13 Tapping Screw (4.2 x 9.
TIG TORCH Parts list and assembly diagram Part 1a 2a 3a 3b 4a 4b 5a 5b 6a Description Torch and Cable Rod Holder Ceramic Nozzle size 5 Ceramic Nozzle size 6 Collet Holder 1.6 mm (1/16”) Collet Holder 2.4 mm (3/32”) Collet 1.6 mm (1/16”) Collet 2.4 mm (3/32”) Plug Qty. 1 1 1 1 1 1 1 1 1 1a 3a 4a 5a 2a 3b 4b 5b 6a PLEASE READ THE FOLLOWING CAREFULLY The manufacturer and/or distributor has provided the parts list and assembly diagram in this manual as a reference tool only.
LIMITED 90 DAY WARRANTY Harbor Freight Tools Co. makes every effort to assure that its products meet high quality and durability standards, and warrants to the original purchaser that this product is free from defects in materials and workmanship for the period of 90 days from the date of purchase.
