Replacing the Gas Cylinder on a Steelcase Criterion Chair

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Changing the Gas Cylinder in your Steelcase Criterion chair can be a cumbersome process, so we put together a quick video guide to take you through the entire project start to finish.

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Table of Contents
0:00 Introduction, Parts, and Setup
0:38 Removing the Old Cylinder
1:39 Plastic Cap Placement
1:55 Reinstalling a New Gas Cylinder
3:08 Installing the Bearing Kit
4:11 Final Remarks

Instructions on Replacing the Gas Cylinder on a Steelcase Criterion chair.

Removing the Original Cylinder
1. First start by inverting the chair. This process does require some forceful measures, so make sure your chair is in a secure position before starting.
2. Next, you’ll need to remove the gold clip holding the base and casters to the cylinder. This part can easily be pried off with a flathead screwdriver.
3. After the clip has been removed, release the plastic accordion tube from the bottom of the chair and lift the entire assembly up and off the chair to expose the cylinder.
4. To remove the cylinder, you’ll need to remove the black, spoked lock rings. These need to be pried out by force with either a screw driver or an awl. Don’t worry about breaking them, they won’t be reused.
5. Once the two lock rings are removed, the cylinder can be lifted from its housing and out of the chair. Any spare bearing hardware can be set aside, it will be thrown away at the end of the project but wait to do so until your chair is working properly again.
6. It’s very unlikely, but if the plastic white cap comes out of the cylinder housing, it just needs to be dropped back in with the button first.

Reinstalling a new cylinder
1. Place the new cylinder into the housing tube with the thin black end extending out of the tube.
2. Next, install the silver washer to keep the cylinder from moving around.
3. Now you can install the new lock rings. You’ll need either a 5/8” deep well socket or a piece of 1/2” pipe to set these rings. One ring at a time, set them over the silver washer and hit them down into the housing using either the socket or pipe and a hammer.
4. Once your lock rings are holding solid, test your cylinder by activating the height adjustment lever, it should extend outwards.
5. Now it’s time to install the bearing kit. The order of installation is rubber stopper first, then black washer, bearing ring, and another black washer. The stopper can be at any height on the cylinder shaft while the bearings and washers will rest on the top.
6. Carefully reinstall the base and casters by lowering it back onto the cylinder and re-secure the accordion tube.
7. Lastly, reinstall the extra silver washer (if there is one) and the gold clip to hold everything together. And that’s it folks!

Crandall Office Furniture has been remanufacturing Steelcase & Herman Miller office chairs since 2002, and since then has grown to become the largest remanufacturer of high-end office seating in the United States. We see and work on thousands of these chairs every year, which gives us a unique insight into how they stand up to long term use, where they fail, and how to fix them. If you're looking to learn more about high end seating, you're in the right place!

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