Hypertherm PAC500 Water Injection Plasma Cutting System - Manual (Page 44)

PAC500 Instruction Manual 5-3
4
MAINTENANCE
Electrode
1. Remove the nozzle as outlined above.
2. Unscrew the electrode with the wrench supplied in the Spare Parts Kit. If the water tube in the torch appears
loose or damaged, see Water Tube replacement.
3. Replace the electrode if crater in the center of the electrode insert exceeds .040 inch (1 mm).
4. Screw the electrode into the torch with the wrench. Do not over tighten!
Swirl Ring
1. Remove the nozzle and electrode as outlined previously.
2. Remove the swirl ring from the electrode and inspect for plugged holes or other damage.
3. Before replacing the swirl ring, apply a light coat of silicone grease to both O-rings. Do not apply an excessive
amount of grease because the grease can plug the swirl ring ports. As a general rule of thumb, you should be
able to feel the grease but not see it.
4. Insert the swirl ring placing the smaller diameter end up toward the rear of the torch as in figure on page 5-4.
Torch
When changing or inspecting any consumable parts, clean the current ring of the torch with a clean paper towel or
Q-tip to remove any dirt, grease, etc.