In order to keep your TIG 185 welder at peak performance, be sure to perform routine and periodic maintenance.

1. Disconnect power supply lines to machine before performing periodic maintenance.
2. Periodically clean the inside of the machine with a low pressure air system. Be sure to clean the following components thoroughly.
   • Main Transformer
   • Electrode/Gas Output Receptacle
   • Polarity Switch
   • Rectifier Assembly
   • Arc Starter/Spark Gap Assembly
   • PC Boards
   • Fan Blades
     
     
3. Inspect welder output and control cables for fraying, cuts, and bare spots.
4. Keep TIG torch and cables in good condition.
5. Clean air louvers to ensure proper air flow and cooling.
6. The fan motor has sealed ball bearings which require no maintenance.
7. SPARK GAP ADJUSTMENT: The spark gap is set at the factory to a gap of 0.020 inches (0.5mm) See Figure D.1. This setting is adequate for most applications. Where less high frequency is desired, the setting can be reduced to 0.008 inches (0.2mm).
   
   

   FIGURE D.1 SPARK GAP

   Refer to figure D.1. Note in highly dirty environments where there is an abundance of conductive contaminants, use a low pressure air stream or a firm piece of paper to clean the spark gap. Do not disturb the factory setting.
   
   To check the spark gap:
   - Turn off input power as specified above.
   - Remove the right side panel from the machine, the spark gap box is located on the lower right side.
   - Check the spark gap with a feeler gauge.
   
   If adjustment is needed:
   - Adjust the gap by loosening the allen head screw in one of the aluminum blocks, and tighten the screw in the new position near the front of the unit.
   
   If the gap is correct:
   - Replace the wraparound.
   
   
8. Inspect gas hose and inlet fitting for cracks or leaks.
9. Replace any unreadable labels or decals.
10. Verify that the machine and welding circuit is properly grounded.