Examine the connections and fittings

Inspect all hoses, cables, and leads for any damage or wear, check the fittings that connect these components, and replace any damaged parts. Components should not twist or kink during operation.

  1. Remove the power from the cutting system.
  2. Examine all of the hoses, cables, and leads that connect system components.
    Look for:
    • Kinks
    • Cracks
    • Cuts
    • Frays
    • Bulges or bubbles
  3. Replace any hose, cable, or lead if you find damage or excessive wear.
  4. Examine all of the fittings that connect the hoses, cables, and leads:
    1. Tighten loose connections if found, but do not make the connections too tight.
      Refer to the following table:
      Table 1. Torque specifications
      The image shows the warning symbol to use two wrenches to tighten. Gas or water hose dimensions N∙m lbf∙in lbf∙ft
      10 mm (3/8 inch) or less 8.5 – 9.5 75 – 84 6.25 – 7
      12 mm (1/2 inch) 16.3 – 19.0 144 – 168 12 – 14
      25 mm (1 inch) 54.2 – 88.1 480 – 780 40 – 65
    2. Order a replacement hose, cable, or lead set if you find its fitting has damage or excess wear.

      Replacement sets are available from Hypertherm®.

      Individual fittings for external hoses, cables, and leads are not replaceable. If you find a problem with an external fitting, you must order a replacement hose, cable, or lead set (with integrated fitting).

      Some hose fittings inside of the plasma power supply are replaceable. For part numbers and specifications, refer to the Plasma power supply parts.

  5. Make sure that the hoses, cables, and leads do not twist or kink during torch movement and system operation.

    Adjust them if needed.

  6. Before you supply power to the cutting system, always complete all inspection and maintenance tasks.