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How to Replace the Hydraulic Cylinder on a Computer Chair

When you press the lift lever or button on your office chair, the seat should move up and down smoothly, with little resistance as you raise and lower the seat. If you get no response, or experience a jerking motion, when operating the height adjustment, chances are the hydraulic cylinder inside the chair is failing. Fortunately, you can purchase a replacement cylinder and fix the office chair yourself.

Things You'll Need

  • Screwdriver
  • Cup or small container
  • Wrench
  • Pipe wrench
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Instructions

    • 1

      Turn the chair over so that the bottom of the seat is facing up. Prop the chair against a desk or table to make it easier to work on.

    • 2

      Find the bolts and screws that hold the seat to the frame of the chair. Every chair model is slightly different, so you will need to look closely to find all of the fasteners.

    • 3

      Remove each screw and bolt from the chair seat assembly. Have a cup or small container ready to hold those screws and bolts as you remove them. You will need to have them on hand when you reassemble the chair.

    • 4

      Lift the seat off the chair frame and set it aside. Be ready to catch any small pieces that come off. Place those pieces with the screws and bolts.

    • 5

      Hold the hydraulic cylinder under the seat and place a pipe wrench on it. Turn the pipe wrench until the cylinder loosens, then pull the cylinder out. Slide the new hydraulic cylinder inside, then reassemble the chair.

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Chairs
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  2. How to Fix the Height Adjuster on a Computer Chair
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  8. How to Replace the Seats on Canvas Chairs
  9. How to Build a Computer Chair
  10. How to Replace a Woven Cane Seat in a Chair
  11. How to Replace the Hydraulic Cylinder on a Desk Chair
  12. How to Replace the Pneumatic Cylinder for an Office Chair

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