Hypertherm - Cut with Confidence

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Image 1/3: Using a 5/64" Allen Wrench, remove the retainer cap from the bottom of the actuator. Image 2/3: Place the actuator in a bench vise.  Tighten the vise enough to slightly compress the actuator springs. Image 3/3: Caution: the actuator assembly contains high-force springs under compression.
  • Remove the air fitting from the top of the actuator

  • Using a 5/64" Allen Wrench, remove the retainer cap from the bottom of the actuator.

  • Place the actuator in a bench vise. Tighten the vise enough to slightly compress the actuator springs.

  • Caution: the actuator assembly contains high-force springs under compression.

  • Using the ratcheting snap ring pliers, compress and remove the snap ring that secures the actuator cap into the housing.

  • Carefully take the actuator out of the vise. All of the internal actuator components can now be removed.

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Image 1/1: Inspect and lubricate all O-rings.
  • After cleaning and inspecting, replace at least the exhaust vent, two O-rings on the actuator shaft, poly seal, and all six springs.

  • Inspect and lubricate all O-rings.

  • Install new O-rings on both ends of the shaft. Note the O-ring sizes and locations.

  • Install the Poly Seal on the actuator piston with the "thick" part of the seal facing "down" (pointing away from the springs).

  • Install the O-ring on the bearing cap.

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Image 1/2: Twist the actuator cap until the four screw holes line up with the holes in the retainer. Image 2/2: Place the actuator in a bench vise.  Tighten the vise enough to slightly compress the actuator springs.
  • After all the internal components have been re-installed, place the retainer cap with the tabs in the slots on the housing.

  • Twist the actuator cap until the four screw holes line up with the holes in the retainer.

  • Place the actuator in a bench vise. Tighten the vise enough to slightly compress the actuator springs.

  • Caution: the actuator assembly contains high-force springs under compression.

  • Using the ratcheting snap ring pliers, compress and replace the snap ring that secures the actuator cap into the housing.

  • Remove the actuator from the vise. Use a 5/64 Allen wrench to tighten the four screws that hold the retainer to the actuator cap.

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Finish Line

One other person completed this guide.

Curtis Boettjer

Member since: 08/28/2013

1 Guide authored

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