Hypertherm HD3070 Plasma Arc Cutting System w/ Automatic Gas Console - Manual (Page 199)

5-74 HD3070 with Automatic Gas Console Instruction Manual
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MAINTENANCE
Torch Maintenance
PAC186 Water Tube Removal and Replacement
1. Use the nut driver (4.5 mm), located in consumable parts kit, to remove water tube from torch (Figure 5-10).
2. Carefully unscrew the water tube in a counterclockwise (ccw) direction.
Caution: While cleaning the inside of the torch in step 3 below, be very careful not to
dislodge the gold band from the groove inside the torch. If this happens internal
arcing damage will occur.
3. After the water tube has been removed, clean the inside of the torch using low pressure compressed air or
water. Carefully clean out the seat area of the water tube of any residue using a cotton swab. Be careful not to
dislodge the gold band from the groove. If the gold ring gets dislodged, reinstall it by referring to Figure 5-10.
4. Apply a light coat of silicone to the O-ring located at the base of the new water tube.
5. Screw the new water tube into the torch clockwise (cw) and tighten with nut driver. Torque to 12-15 inch pounds.
Do not over tighten.
WARNING
Turn off all power to the HyDefinition system before working on the torch. Always press the power
unit OFF (O) pushbutton switch and set the line disconnect switch to OFF. Lock-out and tag-out
switch.