The set screw is actually a 4mm hex key. The torx is a hack. Also, for anyone getting that cylinder out, you may need some sort of hollow pipe on the end of a pipe wrench to get enough leverage to turn it. Lastly, take the base and a home depot bucket. Put a towel around the edge of the bucket to cushion the base, turn it upside down and tap it with something hard (like a 5lb sledge).
Thank you from the UK. My aeron is nearly 20 years old and I just hadn't realised how bad the old gas lift had got. Took less than 5 minutes to put the replacement in with this. Thank god I had inherited a big pipe wrench though - no way was it coming out without some serious leverage !
Thanks for the great video that allowed me to replace my 2005 Herman Miller Aeron Classic very easily. 2 tips: 1- put the chair on the ground on its side, preventing it from rotating with your foot 2- do use a 24" pipe wrench for easy leverage and no issues Cheers
Great suggestion! This worked for me. I don't even have a 24" pipe wrench, more like 16". But with the chair on the ground I was able to use my body weight to hold the chair in place as well as push the pipe wrench down to loosen everything.
Thanks! I had looked at the dozens of change-the-cylinder videos on UA-cam and couldn't figure out why mine wouldn't allow me to set the height. I'm glad I found your specific video about Aeron chairs and the need to adjust the set screw! That made all the difference. Pro tip for large people: I did make the mistake of replacing the cover only to find out I needed to turn the set screw again after the chair started to sink again under my weight . Popping the cover off a second time, I broke one of the clips :( Still, I'm so grateful for this video and the crucial, extra information contained in it!
Thanks for leaving this comment. I swapped the cylinder out and the new one was also stuck at the lowest position. I noticed your comment and tightened up that set screw and it's working perfectly now!
Thank you for this video!!! I had my chair since 2007, and I attribute to it solving some back and neck issues I previously had. It looks like new, but now, with a standing desk, and much larger monitors, I found the the highest position I could get the chair to, was still too low for me to look at the top part of my screens without looking up and pressuring my neck. At some point the lightbulb cam on that maybe there are longer cylinders (I had no idea what this part is called). This was the first video I watched, but was not paying attention to the Crandall. After searching online for the parts (including a torx T25 which I did not have), I purchased a longer cylinder and a let rest from Crandall - absolutely fantastic customer experience when I called to make sure I order the right height. Parts arrived quickly, and it was a delight to see that the video was also made by Crandall!. I followed the instruction (I have the first model shown). I used a bit of canola oil to lubricate the old cylinder because it did not budge - that worked extremely well and within minutes I had the chair set up. Need to turn the Torx (T25 worked for me too) about a full circle counter-clock wise and now I’m writing this comment sitting on my renewed chair at a very comfortable position for my neck. Thank you!
I want to make the exact same modification to my Aeron. I need to make it about 2 inches taller (compared to the stock cylinder). What cylinder size did you buy?
Helpful video! Just fixed my 20 plus year old aeron where the cylinder had finally given out. Since not many have a pipe wrench, a decent vise grip wrench set very tightly and a rubber mallet will do the trick easily enough, same principle as an impact wrench.
I followed these instructions for my 2008 Aeron chair and was able to successfully replace the gas cylinder. It took A LOT of banging on the pipe wrench to loosen the gas cylinder, but once it came loose the rest was pretty straightforward. The new gas cylinder required a set screw adjustment, and I was able to do this with a hex bit vs. the Torx T-25 mentioned in the video.
Thank you sir! Pneumatic cylinder replacement was easy peasy thanks to this video! And the new cylinder (from Crandall) is solid as a rock -- no more multiple adjustments a day!
@@CrandallOfficeFurniture Yeah I second this, thought I was going to need to replace the cylinder and figured I'd watch a video on how first. Got to the "set screw test and adjustment" section and was like .... huh well mines not responding so maybe I just need to do this part. Didn't even take 5 minutes and the fudger is working again.
My chair is probably about 25 years old as I bought mine in central london back in the day - the cylinder has been threatening to give in over the last 2 years or so, but has now finally got the serious wobbles, have the new cylinder and the pipe wrench in a drawer, will be pulling them out tomorrow to hopefully fix this issue :) wish me luck !
These instructions work, but it took 3 of us to get the tube off of the chair, two to hold it down, and 1 with a pipe wrench and extension. But it came out. Removing it from the roller base was simple, two solid wacks.
Great video! I found that a pipe wrench wasn't enough, I needed to slide a pipe extension on the wrench for about 3 feet of leverage and it still took a lot of force to break the cylinder free. For the base I inverted it over a 5 gallon bucket, held a short piece of wood over the cylinder end, and gave it a hard whack with a 5 lb sledge. Be sure to wrap a towel around the rim of the bucket or as I discovered it will mark the base. Once the bad cylinder is off the rest is easy, though I used an allen wrench to adjust the set screw.
Yeah sometimes the cylinders can be really set in there but you did the right thing and I’m glad we were able to help with the video. Thanks for watching!
This was helpful. However, removing the cover at 2:34 didn't seem accurate to mine. As if, in the video it was already partially lifted loose. My cover did not come off easily. And when it finally did, several clips broke. I would recommend a plastic prying tool instead. But I think the replacement cover on your website is reasonably priced, so I went ahead with that order today.
finally got serious wobblies, need to do this now - after nearly 20 years with a chair that i purchased second hand in the first place - amazing how sturdy these chairs are ! made to last, unlike so many things today.
Another '97 Aeron repaired. The pipe wrench to get the seat off worked well. To get the cylender out of the base I ended up taking the wheels off and then using the base to bash the bottom of the cylender against my concrete basement floor. It worked much better than the mallet I was using. I had to adjust the set screw in mine. Someone has said that it's a 4mm allen but a 5/16" allen worked well in mine. It's such low torque that just about anything you could fit in there will turn it.
Good question, if you remove the mechanism cover and there is a set screw at the top then it is a top activated, here is a video about that process. ua-cam.com/video/C0XL0DBrg5E/v-deo.html
Thanks a million! I used a pipe wrench for the top and a brass hammer for the base. BTW they make heavy duty cylinders if you look around so hopefully I won't have to change it for a long time.
My AERON chair (2005 year) cylinder got a small metal pin at the small end. Can I replace the old cylinder with a cylinder with a square white plastic tip at the small end (similar to yours in the video) instead of a small metal pin? The plastic tip seems taller than the metal pin and may affect the set screw setting, does the plastic height damage the screw set assembly and will adjusting the set screw compensate for that extra height? Thanks.
thanks for the video. the steps seem simple enough to follow to do solo. my cylinder has been annoying me for 2 years (had it 16 years) and it is time for some maintenance
just wanted to follow up: i ordered the gas cylinder from your website, changed it out and my chair feels like new. i am incredibly happy. thank you again.
so i changed my cylinder and now my chair is very wobbly where the cylinder meets the main chair body. the chair works but its extremely wobbly all around front back side to side. any thoughts on what the problem might be?
Please reach out to our customer service team and we would love to help you address this problem. If you can send a video to contact@crandalloffice.com of what exactly it is doing that would be great.
My chair is failing to hold it's height after a while, and sometimes when I sit in it, it just goes to the floor, being a large person it is difficult to get back up when it does this. When I do get up and raise the chair, I find it stops from it full height by a few inches, 3-5, and I need to wobble the chair seat to get it to go to the full upright position. The sink wehn sitting can happen a few times before it stops though. I have noticed that the chair seat does have a wobble that it did not have in the past. Will replacing the cylinder fix the wobble as well? Are they identical cylinders? I have the one with the cables I can see when I look under the seat. It is filthy under there! Are all the cylinders the same? Do I need to provide a year of manufacture or some such to get the proper cylinder?
Is the process the same for a HM Mirra chair? And can you get taller gas lifts? I am 6' 5" and been advised my chair needs to be around 80mm higher for corrected posture.
There is a sticker under the seat that should have a year on it and if it doesn't after July 25th 2013 it will have a side activated cylinder and before will have a top activated.
If you got a stool cylinder then it definitely will. if you don't know if your chair is a side or top activated we can help you figure that out if you reach out to us via chat at crandalloffice.com and get you the correct cylinder.
@@CrandallOfficeFurniture i have a Herman miller aeron classic. I’m having trouble with the measurements. I’m looking at the 10 inch cylinder, does that mean 10 inches higher than stock?
The 10" Stool Cylinder raises 10" in length from its lowest point to highest point. at its lowest it is 26" at seat hight to 36" at its highest. They don't base the height from stock. Each cylinder has a min and a max extension and variable seat heights.
@@CrandallOfficeFurniture Please elaborate? Can it be done? What parts are needed? I have a requirement but could not get the stool with Aeron C size chair.
@1:00 Notice how far the old cylinder appears to stick out past the base. Then @2:10 the new cylinder sticks out a LOT less. The cylinder in my 2011 Aeron Classic B sticks out 45mm past the base (leaving 1/2" of clearance to a flat floor). However since my office carpet is worn by having chair wheels in the same place for many years, the carpet bulges up under the center of the chair and the clip on the bottom of the cylinder scrapes into it. Do all cylinders stick out 45mm once they are seated into the base, or are they randomly different?
Depends on the cylinder and where that taper on the bottom of the chair interfaces with the base. The one we installed in the video is about ~1/2" difference in how far it sticks out the bottom of the base (it will seat further into the base once weight is applied & it gets fully seated)
I started this process, but I had to give up taking the cylinder for the day because it was just too difficult. However, I'm noticing that the raising/lowering isn't working any more, even after I adjust the set nail. Is this expected, due to the attempt to take the base off the chair, or should I be concerned that I broke something?
@@mikej4730 I ended up using one of those kits to get it out of the top. With a buddy's help, I was able to get it out of the bottom. Everything is working fine now!
Great you were able to change cylinder. I deal with these chairs on a regular basis, if not I would have told you how to change cylinder with minimal tools.
Handy video, thanks. I was too cheap to buy a pipe wrench. Just used a standard set of grips with a pipe over handle for leverage. Wasnt easy but got the job done. Removing from the star base, suprisingly out on first hit.
Good video but if your cylinder is stuck (like mine was) you can always take the chair seat off, remove the plastic bits and knock it thru from the other side. Mine was not for budging and removing it that way finally worked!
so i went to lower my chair and a long hisssssss and then now it won’t go up or down. do you think i need a new cylinder or just to adjust the set screw?
Thank you for helping me solve a strange mystery with my Aaron chair! I tend to sit with my feet up and found that if I need to lean over to the left or happen to shift such that all my weight is on a certain place then the chair suddenly drops. I couldn't figure this out for the life of me. But what do we see with the "top actuated" style of Aaron chair? Why, we see a big lever sticking up that activates the gas cylinder. So clearly if I put all my weight on just the right spot, I'm bottoming out the seat fabric, pressing on the top of the plastic housing, which is pressing the level and activating the seat height mechanism. Based on the differences shown in your two demos I suspect it won't be possible to convert a top-cylinder model to a side-cylinder model, but maybe I can sand down the level a bit so it doesn't protrude as much or 3D print some reinforcement for the area so that compression of the plastic housing can't press on the lever. Do you by any chance have a solution for my Aaron Chair Gripe #2? The flip locks for the two armrest height adjustments keep coming loose which causes the arms to start sliding down. My armrests have fliplocks that look just like the ones on your sample chairs, not the older thumbscrew/setscrew style. I've been thinking about fabricating some kind of retaining clip to hold the locks closed but I'm all ears if you have something better.
@@CrandallOfficeFurniture Thanks, I've already tried wd40 but it still doesn't work, I've even broken the hammer already XD Now I'm going to try cold to see if that works.
Is there any possibility to adapt a side activated chair to a regular top activated cylinder? thank you! Need help because i cannot find any side activated cylinder in my country
installed new cylinder and it is stuck in up position , cannot find any adjustment for side activated model, ordered second cylinder and same problem , is there adjustment for up down ? thanks jm jan 28/25
I purchased a replacement cylinder from Crandall's, and the installation went smoothly, just as shown in this video. The new cylinder works well, though I wonder if it will hold up as long as the OEM one. The weight of the replacement is 2.4 pounds; the OEM weighs 3 pounds. This suggests that the replacement is of inferior quality, though I'm guessing it would be difficult to find an OEM replacement for a discontinued chair.
@@levigoldson4242 You'll notice that by using the word "suggests," I was indicating an uncertain, though plausible, assessment of it's inferior quality. Typically aftermarket parts (such as those used for cars) cut costs by using less material. I suspect the same is true here. Of course it's possible that the manufacturer could have saved weight and maintained quality by using more exotic materials for the structural members and seals, though the part would have cost much more.
Hello I need to replace a similar cylinder from an older Eames Softpad Chair. Can you give me any suggests as to how to remove that cylinder. On the top it seems to be surrounded by a shiny black epoxy ring but perhaps that is not touching the cylinder but it only holding the collar that the cylinder slides into. Thanks for your help
You will need to take the top part of the mechanism cover off and if you see a cable attached to the cylinder its side activated and if not and looking down you see a set screw with a bar going across then it's a top activated. 6/26/13 is the date where they changed over to side activated cylinders so if you know the manufacture date that will tell you too.
I have 1998 Herman Miller Aeron chai. I received the top activated gas cylinder from you. I have tried several times to remove the cylinder. It does not budge. What should I do?
What kind of tools are you using to get the cylinder out? If you've got a pipe wrench, you may want to try putting an extension bar over it to give yourself some additional leverage. Also if you can get a friend to help, a second pair of hands to hold the chair can be a big help :)
@@CrandallOfficeFurniture I used a 3/4 inch pvc pipe for an extension. With WD 40 on top and bottom of the cylinder, it came off. I am 75, so any one can do it. Taking off the seat helped.
hello everyone. hoping someone can help me. i just built a new desk and now my chair is slightly too low even when maxed out. can someone tell me where to buy one that is taller than the one that's already in the classic?
No matter how hard I try to force it, I can't get the cylinder to start spinning as part of the first step. Any advice? I'm using a Power Grip pipe wrench, which *seems* like the right tool, but maybe not? EDIT: A few minutes after I left this comment, I tried again after taking a closer look at exactly how you held the chair. Maybe adding to the text instructions about exactly where to grip the chair to apply maximum leverage would be a good idea.
If you need immediate assistance for any of your chair questions please reach out to us via chat on our website crandalloffice.com and we will respond asap thank you! Have a great day.
My Aeron is from 97 and all I have is a pair of 10” water pump pliers so it took me getting it down on the ground and holding on while stepping down as hard as I could, even my entire body weight wasn’t enough. Luckily the cylinder popped out of the base no problem
Great video. In what case would you need to adjust the set screw clockwise to tighten it? My chair is very bumpy when I pull the lever but it holds my weight and it's position otherwise
That's correct, you'll want to tighten the set screw in this case, and correct again that you'll want to adjust it clockwise. Only make small adjustments at a time :) Let us know if there's anything else we can do to help!
I just found your video, and my cylinder is on there extremely tight. I purchased it way back in 2000! Is it a good/ bad idea to use a bit of WD-40 to help loosen it?
If you are going to use anything, we recommend leaving the chair upside down overnight and applying penetrating oil to the interface between the cylinder and the mechanism. WD40 typically doesn't do much, but we've had mixed results with penetrating oil :)
Hello! Thank you for the info! I have an old red Equa 2 (I think) swivel chair with an all-metal foot and cylinder, and it sinks. I found a replacement cylinder but it's on an US website and they don't deliver in the UK... How could I fix my chair?
We do stock the Equa gas cylinder, but unfortunately we're not currently setup for shipping to the UK. I would try making some calls to local remanufacturers or refurbishers to see if there's anyone over there that could help :)
Sure do here is the link. Here is the top activated link. www.crandalloffice.com/shop/chairs/herman-miller/aeron/herman-miller-aeron-heavy-duty-gas-cylinder/ Side activated link if your chairs age is after June 2013 www.crandalloffice.com/shop/chairs/herman-miller/aeron/herman-miller-aeron-side-activated-8-stool-gas-cylinder/
They are both top activated cylinders, however the process will be different in regards to the set screw adjustment and the removal of the mechanism cover if needed.
I have a question if you don't mind. I want to buy the Aeron classic but it has the "old" top activated style cylinder but the "newer" Aeron classic has the side activated style cylinder. But why did the Aeron remastered version switch back to a top activated cylinder?? And do you recommend buying an Aeron classic with the top or side activated cylinder?
As long as the chair is in good functional shape, I would not be too concerned about top vs side activated. Not sure why they made the switch on the new remastered, but one is not inherently better than the other.
These videos make it look super simple but the reality is very different if your chair is old. A much smarter way is to disassemble the screw adjuster (very simple to do) and knock out the cylinder using a socket (it's also cheaper than buying a pipe wrench). Also applying WD40 is much easier from the top as it pools up and gradually soaks into the joint. Why? The cylinder has a slight conical shape narrower at the top so you need much less effort to free it when banging down compared to trying to twist it loose.
Currently trying this (have some wd40 stewing in there) after trying with just the pipe wrench. Seeing everyone else here in the comments having trouble with this is making me feel less bad about not being able to do it. Wish me luck!
@@nevilenobody606 I defeated the monster! Ended up placing it at an angle on the floor and managed to use the pipe wrench to unscrew it. My old cylinder was so messed up that the top part would come off so I could separate the part attached to the chair and the part attached to the base. All replaced and it works perfectly!
Removing the screw adjuster, I see a black outer ring, then an inner grey steel ring and a grey round steel washer with a hole in the middle where the pin go up to the screw adjuster. Which part I should hit with the socket ? Thanks. I'm too weak to use the pipe wrench. My Herman Miller chair was made in march 2005.
Hi Mike, Replaced my top loading cylinder with your replacement cylinder but seat would not stay elevated. I adjusted the set screw out, but chair still stayed bottomed out. I then adjusted the set screw down a little at a time to no avail. When I got it all the way down, I sat on the chair and pulled the lever to go back up, and the plastic piece (at the cylinder) end broke. Chair is now up but fixed in place. What happened?
Is there any way you can email over a few pictures of your cylinder and set screw? Not sure what happened here, but with some additional information we will absolutely do our best to help you out! :) contact at crandalloffice.com
@@leedilkie4028 I tried and it was hard to pull off so I thought it was supposed to be there. Plus - was not mentioned in the video I watched from the place of purchase! Thanks.
Thanks for the great video! A question though - these are expensive chairs, right? Should you need to be doing this? Looking to buy a bunch for a new office we are setting up. Their website says With limited exceptions, our products are covered by a 12-year warranty that includes parts and labor. (but then does have a long list of models that have shorter warranty). If we are going to spend that much, should we have to be replacing the piston a) at all - shouldn't it last under the warranty? and b) if it does fail in less than 12 years, why get your hands dirty? Just have THEM replace it under warranty?
Yes these are indeed expensive chairs, and they use the highest grade of gas cylinder you can buy (both OEM and our aftermarket replacements for our refurbished chairs). I'm not sure which website you are referring to with that verbiage, but our refurbished Aeron Classic chairs come with a 12 year warranty (which also covers the gas cylinder) - many cylinders make it much longer than that, but that can vary quite a bit based on the user and how much use the cylinder gets. If it does fail within that 12 year window, we will send you a replacement cylinder, though our warranty does not cover the labor to replace the cylinder. I hope this answers your questions - if you have any others or would like to speak with someone over here, please reach out to us through crandalloffice.com or email us at contact@crandalloffice.com
Mr Schnatter - I've just replaced the gas cylinder in my Aeron (which I bought 2nd hand in 2002 and have been using on a daily basis ever since) - during the repair I noticed a sticker on the inner cover saying it was manufactured in 1997... Any office chair that lasts 25yrs (& can then be repaired for $30) has my vote!
Had a hard time loosening the cylinder from my older Aeron. I turned the chair over on a box and used a pipe wrench, but couldn't get a good hold on the chair for leverage. Then I saw another video from Crandall's where she turned the chair over on it's front so the front of the seat was firmly on the ground and the legs were sticking up at an angle. That allowed me to me to apply more leverage on the pipe wrench and it turned, then came out easily. Popped the cylinder out from the legs as shown here. Then after putting the new cylinder in, had to adjust it because it went down when I sat on it. Used the 4mm allen wrench and turned about a half to one turn counter-clockwise. All fixed. Thanks for showing us how to get more life out of these expensive chairs.
Need to use a pipe wrench was the only way to remove the old cylinder. The set screw hex adjustment was important as the amazon cylinder replacement did not have any instructions on the set screw
if you have a top activated you will see a set screw under the mechanism cover, which this is how to take it off. ua-cam.com/video/Aw9_uPq3WZA/v-deo.html
Worked as expected, except my cylinder appeared to be in two pieces where it attached to the chair, like a sleeve. I had attach the pipe wrench to inner tube to get it out. You won't need a breaker bar for this. It's tight, but put some muscle into it and it'll spin. Biggest issue was bracing the chair from spinning. I had to place it on the floor and step on one side to make sure the entire chair didn't spin around. My cylinder popped right out of the legs with a good whack. No baby sledge needed.
The date of the chair on the sticker underneath should help identify which style of cylinder your chair has. Aeron Classic Chairs Made Before 06/26/2013 use a top activated cylinder, and Classics chairs made after this date use a side activated cylinder.
@@CrandallOfficeFurniture Thank you for the reply. I had to replace my seat pan back at the beginning of 2021 and I didn't keep the sticker that would have this info - is there possibly another, other than taking the cover off the bottom of the chair and looking?
I have a new remastered Aeron that has a play or wobble in the cylinder that gives like 6-7 mm movement on the top of the chair, and you can feel it's in the cylinder, is that normal?
That does not sound normal based on the description - can you email over a video of what's going on there to contact@crandalloffice.com ? We'd be happy to take a look and see if we can help! :)
Did you figure out what made your chair wobble? I'm having the same issue. My aeron gaming chair tilts front to back and side to side. It's driving me nuts! Please help!
First - great video - thank you! STILL STUCK? Pipe wrench and 3' cheater pipe - no dice - would not budge Disassemble chair to get to top of cylinder by removing seat and cylinder adjuster - use a socket and hammer to try and dislodge that way - would not budge. Use 10ton king pin press on top of cylinder and it popped out with relative ease. Just take lots of pictures if you dissemble your chair - as there are a bunch of parts to keep track of. You'll be an expert on them when done however =)
Ive had this chair about haf my life (16 years) the past 5 years Ive been dealing with a broken cylinder. Thanks for saving my day with this video!
Oh we are glad that this was able to help you!
The set screw is actually a 4mm hex key. The torx is a hack. Also, for anyone getting that cylinder out, you may need some sort of hollow pipe on the end of a pipe wrench to get enough leverage to turn it. Lastly, take the base and a home depot bucket. Put a towel around the edge of the bucket to cushion the base, turn it upside down and tap it with something hard (like a 5lb sledge).
Second the "tapping" with a sledge hammer
+1 use a bucket
I used a 36" pipe wrench and even with that it barely came out.
@@georgesmith4639 I still can’t get it out :(
Yes, that's what I found -- the 4mm hex bit worked like a charm which means that the Torx T-25 is the wrong tool/bit.
Thank you from the UK. My aeron is nearly 20 years old and I just hadn't realised how bad the old gas lift had got. Took less than 5 minutes to put the replacement in with this. Thank god I had inherited a big pipe wrench though - no way was it coming out without some serious leverage !
Glad to be of service!
Thanks for the great video that allowed me to replace my 2005 Herman Miller Aeron Classic very easily. 2 tips:
1- put the chair on the ground on its side, preventing it from rotating with your foot
2- do use a 24" pipe wrench for easy leverage and no issues
Cheers
Great suggestion! This worked for me. I don't even have a 24" pipe wrench, more like 16". But with the chair on the ground I was able to use my body weight to hold the chair in place as well as push the pipe wrench down to loosen everything.
Happy it helped!
Thanks! I had looked at the dozens of change-the-cylinder videos on UA-cam and couldn't figure out why mine wouldn't allow me to set the height. I'm glad I found your specific video about Aeron chairs and the need to adjust the set screw! That made all the difference. Pro tip for large people: I did make the mistake of replacing the cover only to find out I needed to turn the set screw again after the chair started to sink again under my weight . Popping the cover off a second time, I broke one of the clips :( Still, I'm so grateful for this video and the crucial, extra information contained in it!
Thanks for leaving this comment. I swapped the cylinder out and the new one was also stuck at the lowest position. I noticed your comment and tightened up that set screw and it's working perfectly now!
Ordered the side activated replacement cylinder, watched this video, and now I'm sitting well on my revitalized chair. Thanks!
Love to hear it!
Thank you for this video!!! I had my chair since 2007, and I attribute to it solving some back and neck issues I previously had. It looks like new, but now, with a standing desk, and much larger monitors, I found the the highest position I could get the chair to, was still too low for me to look at the top part of my screens without looking up and pressuring my neck. At some point the lightbulb cam on that maybe there are longer cylinders (I had no idea what this part is called). This was the first video I watched, but was not paying attention to the Crandall. After searching online for the parts (including a torx T25 which I did not have), I purchased a longer cylinder and a let rest from Crandall - absolutely fantastic customer experience when I called to make sure I order the right height. Parts arrived quickly, and it was a delight to see that the video was also made by Crandall!. I followed the instruction (I have the first model shown). I used a bit of canola oil to lubricate the old cylinder because it did not budge - that worked extremely well and within minutes I had the chair set up. Need to turn the Torx (T25 worked for me too) about a full circle counter-clock wise and now I’m writing this comment sitting on my renewed chair at a very comfortable position for my neck. Thank you!
Thank you so much for the positive feedback, if you need anything else don't hesitate to reach out!
I want to make the exact same modification to my Aeron. I need to make it about 2 inches taller (compared to the stock cylinder). What cylinder size did you buy?
Bravo. Thank you for this! The Set Screw adjustment was so important and really helped me finish the job.
Helpful video! Just fixed my 20 plus year old aeron where the cylinder had finally given out. Since not many have a pipe wrench, a decent vise grip wrench set very tightly and a rubber mallet will do the trick easily enough, same principle as an impact wrench.
Thanks for sharing your tip - We're glad you were able to get your chair fixed!
I followed these instructions for my 2008 Aeron chair and was able to successfully replace the gas cylinder. It took A LOT of banging on the pipe wrench to loosen the gas cylinder, but once it came loose the rest was pretty straightforward. The new gas cylinder required a set screw adjustment, and I was able to do this with a hex bit vs. the Torx T-25 mentioned in the video.
Awesome! Thank you for watching.
I’m struggling to even tighten my 18” pipe wrench onto the cylinder. Any advice?
Thank you sir! Pneumatic cylinder replacement was easy peasy thanks to this video! And the new cylinder (from Crandall) is solid as a rock -- no more multiple adjustments a day!
Wonderful! yay! We are happy that we were able to help you. Have a great day!
Today received & installed a replacement cylinder for my 1997 Aeron. Works perfectly! Thank you!
Great to hear!
thanks fixed my chair thats been broken for 6 years
Glad to help!
@@CrandallOfficeFurniture Yeah I second this, thought I was going to need to replace the cylinder and figured I'd watch a video on how first. Got to the "set screw test and adjustment" section and was like .... huh well mines not responding so maybe I just need to do this part. Didn't even take 5 minutes and the fudger is working again.
Thanks, very helpful. It's crazy how tight those cylinders can get.
Just finished installing a new cylinder in my Aeron Posturefit SL -size C, and was very east thanks to this video.
Great to hear!
My chair is probably about 25 years old as I bought mine in central london back in the day - the cylinder has been threatening to give in over the last 2 years or so, but has now finally got the serious wobbles, have the new cylinder and the pipe wrench in a drawer, will be pulling them out tomorrow to hopefully fix this issue :) wish me luck !
How'd it go?
My B sized chair is like new again. Quality Cylinder and padding from Crandall are worth every penny! Thanks, guys and gals.
Great to hear!
These instructions work, but it took 3 of us to get the tube off of the chair, two to hold it down, and 1 with a pipe wrench and extension. But it came out. Removing it from the roller base was simple, two solid wacks.
Yes they can be set in there pretty good
Thank god dude, I am cranking on this bad boy right now by myself and it is not budging. 😂 I thought I was doing something wrong.
Great tut
Took me less than 5 min
I used a cresson wrench and a sledge hammer
Wow fast and done
Glad we could help!
Thank you! You saved the day. I found a cheap spare part and could adjust due to your help
Awesome! We love helping.
Great video! I found that a pipe wrench wasn't enough, I needed to slide a pipe extension on the wrench for about 3 feet of leverage and it still took a lot of force to break the cylinder free. For the base I inverted it over a 5 gallon bucket, held a short piece of wood over the cylinder end, and gave it a hard whack with a 5 lb sledge. Be sure to wrap a towel around the rim of the bucket or as I discovered it will mark the base. Once the bad cylinder is off the rest is easy, though I used an allen wrench to adjust the set screw.
Yeah sometimes the cylinders can be really set in there but you did the right thing and I’m glad we were able to help with the video. Thanks for watching!
This was helpful. However, removing the cover at 2:34 didn't seem accurate to mine. As if, in the video it was already partially lifted loose. My cover did not come off easily. And when it finally did, several clips broke. I would recommend a plastic prying tool instead. But I think the replacement cover on your website is reasonably priced, so I went ahead with that order today.
Nice. I was getting the wobblies when it was near max height. Followed this for the cylinder swap and didn't need to mess with the screw. Done.
finally got serious wobblies, need to do this now - after nearly 20 years with a chair that i purchased second hand in the first place - amazing how sturdy these chairs are ! made to last, unlike so many things today.
Another '97 Aeron repaired. The pipe wrench to get the seat off worked well. To get the cylender out of the base I ended up taking the wheels off and then using the base to bash the bottom of the cylender against my concrete basement floor. It worked much better than the mallet I was using.
I had to adjust the set screw in mine. Someone has said that it's a 4mm allen but a 5/16" allen worked well in mine. It's such low torque that just about anything you could fit in there will turn it.
How do you know if your chair is top or side activated ?
Good question, if you remove the mechanism cover and there is a set screw at the top then it is a top activated, here is a video about that process. ua-cam.com/video/C0XL0DBrg5E/v-deo.html
Thanks a million! I used a pipe wrench for the top and a brass hammer for the base. BTW they make heavy duty cylinders if you look around so hopefully I won't have to change it for a long time.
Thank you!
My AERON chair (2005 year) cylinder got a small metal pin at the small end. Can I replace the old cylinder with a cylinder with a square white plastic tip at the small end (similar to yours in the video) instead of a small metal pin? The plastic tip seems taller than the metal pin and may affect the set screw setting, does the plastic height damage the screw set assembly and will adjusting the set screw compensate for that extra height? Thanks.
Please send a photo and a brief description of your question to contact@crandalloffice.com and we will help find the right cylinder for you!
thanks for the video. the steps seem simple enough to follow to do solo. my cylinder has been annoying me for 2 years (had it 16 years) and it is time for some maintenance
Thanks for watching!
just wanted to follow up: i ordered the gas cylinder from your website, changed it out and my chair feels like new. i am incredibly happy. thank you again.
Glad to hear it!
so i changed my cylinder and now my chair is very wobbly where the cylinder meets the main chair body. the chair works but its extremely wobbly all around front back side to side. any thoughts on what the problem might be?
Please reach out to our customer service team and we would love to help you address this problem. If you can send a video to contact@crandalloffice.com of what exactly it is doing that would be great.
Thank you for this video. I had the cylinder replaced in less than ten minutes!
Glad you found it helpful and were able to get your chair fixed so quickly! :) Thank you for watching!!
My chair is failing to hold it's height after a while, and sometimes when I sit in it, it just goes to the floor, being a large person it is difficult to get back up when it does this. When I do get up and raise the chair, I find it stops from it full height by a few inches, 3-5, and I need to wobble the chair seat to get it to go to the full upright position. The sink wehn sitting can happen a few times before it stops though. I have noticed that the chair seat does have a wobble that it did not have in the past. Will replacing the cylinder fix the wobble as well?
Are they identical cylinders? I have the one with the cables I can see when I look under the seat. It is filthy under there!
Are all the cylinders the same? Do I need to provide a year of manufacture or some such to get the proper cylinder?
What chair are you currently sitting in, if you know?
@@CrandallOfficeFurniture How do you tell? I got it over 15 maybe 20 years ago now.
Please send a picture and video of the issue to contact@crandalloffice.com. We'll do our best to assist you. Thank you, and have a great day!
@@CrandallOfficeFurniture Email just sent.
Can you put the cylinder back once you have removed it?
Sure can!
@@CrandallOfficeFurniture Thanks!
You're welcome!
Is the process the same for a HM Mirra chair? And can you get taller gas lifts? I am 6' 5" and been advised my chair needs to be around 80mm higher for corrected posture.
Please reach out to Kim via chat @ crandalloffice.com we would love to help you
I bought my chair a couple years ago second hand and not sure which year it was made, know the best way to find that out is?
There is a sticker under the seat that should have a year on it and if it doesn't after July 25th 2013 it will have a side activated cylinder and before will have a top activated.
would changin the cylinder would make my chair higher?
If you got a stool cylinder then it definitely will. if you don't know if your chair is a side or top activated we can help you figure that out if you reach out to us via chat at crandalloffice.com and get you the correct cylinder.
@@CrandallOfficeFurniture i have a Herman miller aeron classic. I’m having trouble with the measurements. I’m looking at the 10 inch cylinder, does that mean 10 inches higher than stock?
The 10" Stool Cylinder raises 10" in length from its lowest point to highest point. at its lowest it is 26" at seat hight to 36" at its highest. They don't base the height from stock. Each cylinder has a min and a max extension and variable seat heights.
Thanks, for the video. I have a Aeron C. I'm looking to get the higher Stool cylinder and foot rest, can that be done?
We don't recommend it!
@@CrandallOfficeFurniture Please elaborate? Can it be done? What parts are needed? I have a requirement but could not get the stool with Aeron C size chair.
@1:00 Notice how far the old cylinder appears to stick out past the base. Then @2:10 the new cylinder sticks out a LOT less. The cylinder in my 2011 Aeron Classic B sticks out 45mm past the base (leaving 1/2" of clearance to a flat floor). However since my office carpet is worn by having chair wheels in the same place for many years, the carpet bulges up under the center of the chair and the clip on the bottom of the cylinder scrapes into it. Do all cylinders stick out 45mm once they are seated into the base, or are they randomly different?
Depends on the cylinder and where that taper on the bottom of the chair interfaces with the base. The one we installed in the video is about ~1/2" difference in how far it sticks out the bottom of the base (it will seat further into the base once weight is applied & it gets fully seated)
I started this process, but I had to give up taking the cylinder for the day because it was just too difficult. However, I'm noticing that the raising/lowering isn't working any more, even after I adjust the set nail. Is this expected, due to the attempt to take the base off the chair, or should I be concerned that I broke something?
Did get the cylinder out?
@@mikej4730 I ended up using one of those kits to get it out of the top. With a buddy's help, I was able to get it out of the bottom. Everything is working fine now!
Great you were able to change cylinder. I deal with these chairs on a regular basis, if not I would have told you how to change cylinder with minimal tools.
Anyone know if this procedure will work for a aeron remastered?? Thanks.
It should yes
Handy video, thanks. I was too cheap to buy a pipe wrench. Just used a standard set of grips with a pipe over handle for leverage. Wasnt easy but got the job done.
Removing from the star base, suprisingly out on first hit.
Vice grips + pipe didn’t work for me. Picked up a pipe wrench at harbor freight for $12. Took the piston right off
Glad we could help, they can be a handful.
Should I use a 14 inch pipe wrench - or an 18 inch pipe wrench? Thank you
Hello!
Curious if following this tutorial could help me change an Aeron stool to a chair?
Excellent video. Thank you! About to swap out my pneumatic gas lift.
Glad to Help! Thank you for watching
I have a 2006 Herman Miller Aeron were there is no cable to disengage, I wonder how old is that second chair in the video.
Great video - really helped me swap out a bad gas canister. Thanks!
Glad it helped
Good video but if your cylinder is stuck (like mine was) you can always take the chair seat off, remove the plastic bits and knock it thru from the other side. Mine was not for budging and removing it that way finally worked!
Any tips to get the gas cylinder out. It is not budging, I'm tearing the thing to shreds trying to get it out.
Maybe a cheater bar to get more leverage?
hello, I own a 1995 aeron, not sure if that makes a difference, but when I took the top shell off my internals looked completely different
Please send a video or picture of what it looks like and what you are dealing with to our customer service email at Contact@crandalloffice.com
Watched this video fix my chair, Thank You very much
We are so happy that it helped you! Please let us know if there is anything else we can help with.
Does this damage the cylinder? I was planning to disassemble the chair and ship to back to my home country.
just scuffs up the outer can but shouldn't cause anything to not function properly.
@@CrandallOfficeFurniture thank you for confirming this!
You're welcome
Hello, will the hammer damage the old cylinder? Mine is still new but I want to modify the chair.
Yes the hammer can damage the old cylinder as far as cosmetically but not function wise.
@@CrandallOfficeFurniture Awesome thank you!
Id like to ship my aeron and would like to save some money on shipping. Can I still reuse the cylinder if it's still very new?
definitely!
so i went to lower my chair and a long hisssssss and then now it won’t go up or down. do you think i need a new cylinder or just to adjust the set screw?
Try the set screw adjustment and if that doesn't work then you may need a new cylinder.
Hello,
I have an old Herman Miller chair, from 2000.
It's a size B and model AU123AWC.
Which gas cylinder should fit for it?
Your chair should use the top activated style gas cylinder :)
www.crandalloffice.com/shop/chairs/herman-miller/aeron/herman-miller-aeron-gas-cylinder/
Thank you for helping me solve a strange mystery with my Aaron chair! I tend to sit with my feet up and found that if I need to lean over to the left or happen to shift such that all my weight is on a certain place then the chair suddenly drops. I couldn't figure this out for the life of me. But what do we see with the "top actuated" style of Aaron chair? Why, we see a big lever sticking up that activates the gas cylinder. So clearly if I put all my weight on just the right spot, I'm bottoming out the seat fabric, pressing on the top of the plastic housing, which is pressing the level and activating the seat height mechanism.
Based on the differences shown in your two demos I suspect it won't be possible to convert a top-cylinder model to a side-cylinder model, but maybe I can sand down the level a bit so it doesn't protrude as much or 3D print some reinforcement for the area so that compression of the plastic housing can't press on the lever.
Do you by any chance have a solution for my Aaron Chair Gripe #2? The flip locks for the two armrest height adjustments keep coming loose which causes the arms to start sliding down. My armrests have fliplocks that look just like the ones on your sample chairs, not the older thumbscrew/setscrew style. I've been thinking about fabricating some kind of retaining clip to hold the locks closed but I'm all ears if you have something better.
Do you guys have any guide on how to do a herman miller embody by any chance or is the same as doing it as with the Aeron
When you use the pipe wrench on the gas cylinder, does clockwise/counter clockwise matter?
No it doesn't you are just trying to break the tapered union free -- either direction should be able to accomplish that :)
Does this tutorial apply to the HM aeron stool as well?
Yes it does
Will this same process work for the remastered version?
Yes it should
Where can I get a stand like that? I work on these quite a bit
I am unable to remove the cylinder from the legs, any recommendations?
Here is a Video of more in depth on how to help that.ua-cam.com/video/oX6klEf_okk/v-deo.html
@@CrandallOfficeFurniture Thanks, I've already tried wd40 but it still doesn't work, I've even broken the hammer already XD Now I'm going to try cold to see if that works.
What cylinder you are using in video, wire or pin?
The first chair is a Top activated button style and the second chair is a side activated wire style
Is there any possibility to adapt a side activated chair to a regular top activated cylinder? thank you!
Need help because i cannot find any side activated cylinder in my country
No sorry we can't find anything that looks like this is a possibility.
installed new cylinder and it is stuck in up position , cannot find any adjustment for side activated model, ordered second cylinder and same problem , is there adjustment for up down ? thanks jm jan 28/25
Please reach out to us at Contact@crandalloffice.com, and we will do our best to assist you. Thanks, and have a great day!
I purchased a replacement cylinder from Crandall's, and the installation went smoothly, just as shown in this video. The new cylinder works well, though I wonder if it will hold up as long as the OEM one. The weight of the replacement is 2.4 pounds; the OEM weighs 3 pounds. This suggests that the replacement is of inferior quality, though I'm guessing it would be difficult to find an OEM replacement for a discontinued chair.
No, it suggests it weighs less. It speaks nothing of quality.
@@levigoldson4242 You'll notice that by using the word "suggests," I was indicating an uncertain, though plausible, assessment of it's inferior quality. Typically aftermarket parts (such as those used for cars) cut costs by using less material. I suspect the same is true here. Of course it's possible that the manufacturer could have saved weight and maintained quality by using more exotic materials for the structural members and seals, though the part would have cost much more.
Does this work for other Herman Miller chairs as well? I have a Celle I'd like to make taller.
Not 100% sure, we will have to get back to you on that. Great question though!
Thank you, I was able to repair my 1997 Aeron, feels factory new.
Awesome! You are welcome.
Hello
I need to replace a similar cylinder from an older Eames Softpad Chair. Can you give me any suggests as to how to remove that cylinder. On the top it seems to be surrounded by a shiny black epoxy ring but perhaps that is not touching the cylinder but it only holding the collar that the cylinder slides into. Thanks for your help
Can you email some pictures of your chair to contact@crandalloffice.com - we'd like to take a closer look before giving any specific recommendations.
Thanks so much for this video! You saved my chair :)
So happy to hear that! Thank you for watching.
Hey, i have a caper stool chair. Are the pneumatic parts the same part?
Just bought a used classic Aeron. When I sit the chair feels a wobbly. Would changing the gas cylinder get rid of the wobbliness?
Please reach out to our customer service team contact@crandalloffice.com and we would love to help and get into more details about your chair
hi crandall! I am trying to replace my gas cylinder, how do I know if my chair is top or side activated?
You will need to take the top part of the mechanism cover off and if you see a cable attached to the cylinder its side activated and if not and looking down you see a set screw with a bar going across then it's a top activated. 6/26/13 is the date where they changed over to side activated cylinders so if you know the manufacture date that will tell you too.
@@CrandallOfficeFurniture Thanks for the informative reply. Mine is made in 2007 so it's top sided. Thank you!!
Of course, glad to help.
I have 1998 Herman Miller Aeron chai. I received the top activated gas cylinder from you. I have tried several times to remove the cylinder. It does not budge. What should I do?
What kind of tools are you using to get the cylinder out? If you've got a pipe wrench, you may want to try putting an extension bar over it to give yourself some additional leverage. Also if you can get a friend to help, a second pair of hands to hold the chair can be a big help :)
@@CrandallOfficeFurniture I used a 3/4 inch pvc pipe for an extension. With WD 40 on top and bottom of the cylinder, it came off. I am 75, so any one can do it. Taking off the seat helped.
Will replacing the cylinder stop any wobble issues?
hello everyone. hoping someone can help me. i just built a new desk and now my chair is slightly too low even when maxed out. can someone tell me where to buy one that is taller than the one that's already in the classic?
We have a video here that might be of some help with links in the description to purchase a stool cylinder. ua-cam.com/video/tl17_zb19Wk/v-deo.html
Saved me so much money thank you!!!!!
You are so welcome! So happy to help.
No matter how hard I try to force it, I can't get the cylinder to start spinning as part of the first step. Any advice? I'm using a Power Grip pipe wrench, which *seems* like the right tool, but maybe not?
EDIT: A few minutes after I left this comment, I tried again after taking a closer look at exactly how you held the chair. Maybe adding to the text instructions about exactly where to grip the chair to apply maximum leverage would be a good idea.
If you need immediate assistance for any of your chair questions please reach out to us via chat on our website crandalloffice.com and we will respond asap thank you! Have a great day.
My Aeron is from 97 and all I have is a pair of 10” water pump pliers so it took me getting it down on the ground and holding on while stepping down as hard as I could, even my entire body weight wasn’t enough. Luckily the cylinder popped out of the base no problem
Yea they get stuck in their pretty good!
Great video. In what case would you need to adjust the set screw clockwise to tighten it? My chair is very bumpy when I pull the lever but it holds my weight and it's position otherwise
That's correct, you'll want to tighten the set screw in this case, and correct again that you'll want to adjust it clockwise. Only make small adjustments at a time :) Let us know if there's anything else we can do to help!
Which gas cylinder do I need (top or side activated chair)? 2006 AE123AWB. Thanks
I just found your video, and my cylinder is on there extremely tight. I purchased it way back in 2000! Is it a good/ bad idea to use a bit of WD-40 to help loosen it?
WD40 may work in a pinch but it isn't a very good lubricant (it's primarily a Water Dispersant). Get something like Jigaloo
If you are going to use anything, we recommend leaving the chair upside down overnight and applying penetrating oil to the interface between the cylinder and the mechanism. WD40 typically doesn't do much, but we've had mixed results with penetrating oil :)
Hello!
Thank you for the info!
I have an old red Equa 2 (I think) swivel chair with an all-metal foot and cylinder, and it sinks. I found a replacement cylinder but it's on an US website and they don't deliver in the UK... How could I fix my chair?
We do stock the Equa gas cylinder, but unfortunately we're not currently setup for shipping to the UK. I would try making some calls to local remanufacturers or refurbishers to see if there's anyone over there that could help :)
Does Crandall sell the cylinders?
Sure do here is the link. Here is the top activated link. www.crandalloffice.com/shop/chairs/herman-miller/aeron/herman-miller-aeron-heavy-duty-gas-cylinder/
Side activated link if your chairs age is after June 2013 www.crandalloffice.com/shop/chairs/herman-miller/aeron/herman-miller-aeron-side-activated-8-stool-gas-cylinder/
Is this the same for the remastered one?
They are both top activated cylinders, however the process will be different in regards to the set screw adjustment and the removal of the mechanism cover if needed.
I have a question if you don't mind. I want to buy the Aeron classic but it has the "old" top activated style cylinder but the "newer" Aeron classic has the side activated style cylinder. But why did the Aeron remastered version switch back to a top activated cylinder?? And do you recommend buying an Aeron classic with the top or side activated cylinder?
As long as the chair is in good functional shape, I would not be too concerned about top vs side activated. Not sure why they made the switch on the new remastered, but one is not inherently better than the other.
These videos make it look super simple but the reality is very different if your chair is old. A much smarter way is to disassemble the screw adjuster (very simple to do) and knock out the cylinder using a socket (it's also cheaper than buying a pipe wrench). Also applying WD40 is much easier from the top as it pools up and gradually soaks into the joint. Why? The cylinder has a slight conical shape narrower at the top so you need much less effort to free it when banging down compared to trying to twist it loose.
Currently trying this (have some wd40 stewing in there) after trying with just the pipe wrench. Seeing everyone else here in the comments having trouble with this is making me feel less bad about not being able to do it. Wish me luck!
@@trashkitty78 this is how I did it after trying other so called methods. Good luck!
@@nevilenobody606 I defeated the monster! Ended up placing it at an angle on the floor and managed to use the pipe wrench to unscrew it.
My old cylinder was so messed up that the top part would come off so I could separate the part attached to the chair and the part attached to the base.
All replaced and it works perfectly!
@@trashkitty78 no more messing around for another 15 years!
Removing the screw adjuster, I see a black outer ring, then an inner grey steel ring and a grey round steel washer with a hole in the middle where the pin go up to the screw adjuster. Which part I should hit with the socket ? Thanks. I'm too weak to use the pipe wrench. My Herman Miller chair was made in march 2005.
Hi Mike,
Replaced my top loading cylinder with your replacement cylinder but seat would not stay elevated. I adjusted the set screw out, but chair still stayed bottomed out. I then adjusted the set screw down a little at a time to no avail. When I got it all the way down, I sat on the chair and pulled the lever to go back up, and the plastic piece (at the cylinder) end broke. Chair is now up but fixed in place. What happened?
Is there any way you can email over a few pictures of your cylinder and set screw? Not sure what happened here, but with some additional information we will absolutely do our best to help you out! :) contact at crandalloffice.com
did you remember to pull the protective plastic cap off the new cylinder?
@@leedilkie4028 I tried and it was hard to pull off so I thought it was supposed to be there. Plus - was not mentioned in the video I watched from the place of purchase! Thanks.
Thanks for the great video! A question though - these are expensive chairs, right? Should you need to be doing this? Looking to buy a bunch for a new office we are setting up. Their website says
With limited exceptions, our products are covered by a 12-year warranty that includes parts and labor.
(but then does have a long list of models that have shorter warranty).
If we are going to spend that much, should we have to be replacing the piston
a) at all - shouldn't it last under the warranty? and
b) if it does fail in less than 12 years, why get your hands dirty? Just have THEM replace it under warranty?
Yes these are indeed expensive chairs, and they use the highest grade of gas cylinder you can buy (both OEM and our aftermarket replacements for our refurbished chairs). I'm not sure which website you are referring to with that verbiage, but our refurbished Aeron Classic chairs come with a 12 year warranty (which also covers the gas cylinder) - many cylinders make it much longer than that, but that can vary quite a bit based on the user and how much use the cylinder gets. If it does fail within that 12 year window, we will send you a replacement cylinder, though our warranty does not cover the labor to replace the cylinder. I hope this answers your questions - if you have any others or would like to speak with someone over here, please reach out to us through crandalloffice.com or email us at contact@crandalloffice.com
Mr Schnatter - I've just replaced the gas cylinder in my Aeron (which I bought 2nd hand in 2002 and have been using on a daily basis ever since) - during the repair I noticed a sticker on the inner cover saying it was manufactured in 1997... Any office chair that lasts 25yrs (& can then be repaired for $30) has my vote!
Had a hard time loosening the cylinder from my older Aeron. I turned the chair over on a box and used a pipe wrench, but couldn't get a good hold on the chair for leverage. Then I saw another video from Crandall's where she turned the chair over on it's front so the front of the seat was firmly on the ground and the legs were sticking up at an angle. That allowed me to me to apply more leverage on the pipe wrench and it turned, then came out easily. Popped the cylinder out from the legs as shown here. Then after putting the new cylinder in, had to adjust it because it went down when I sat on it. Used the 4mm allen wrench and turned about a half to one turn counter-clockwise. All fixed. Thanks for showing us how to get more life out of these expensive chairs.
We are so happy that you were able to fix your chair and that we were able to help with that process. Have a great day!
Need to use a pipe wrench was the only way to remove the old cylinder. The set screw hex adjustment was important as the amazon cylinder replacement did not have any instructions on the set screw
Anyone know how I can tell if my chair is top or side activated? Cheers guys!
if you have a top activated you will see a set screw under the mechanism cover, which this is how to take it off. ua-cam.com/video/Aw9_uPq3WZA/v-deo.html
How do I know if my Aeron is side activated or top activated?
Top activated has a set screw and the side doesn't
Worked as expected, except my cylinder appeared to be in two pieces where it attached to the chair, like a sleeve. I had attach the pipe wrench to inner tube to get it out. You won't need a breaker bar for this. It's tight, but put some muscle into it and it'll spin. Biggest issue was bracing the chair from spinning. I had to place it on the floor and step on one side to make sure the entire chair didn't spin around. My cylinder popped right out of the legs with a good whack. No baby sledge needed.
We are glad you were able to get it out!
I own a herman miller aeron chair and is there an easy way to know if my chair is a side activated cylindar or a top activated cylindar?
The date of the chair on the sticker underneath should help identify which style of cylinder your chair has.
Aeron Classic Chairs Made Before 06/26/2013 use a top activated cylinder, and Classics chairs made after this date use a side activated cylinder.
@@CrandallOfficeFurniture Thank you for the reply. I had to replace my seat pan back at the beginning of 2021 and I didn't keep the sticker that would have this info - is there possibly another, other than taking the cover off the bottom of the chair and looking?
@@mbiehl2 Removing the mechanism housing and looking will be the best way to tell without the sticker :)
What does top vs side activated mean?
And how do you tell which you have?
Do you have one for a Steelcase Amia 842?
Here you go! www.crandalloffice.com/shop/chairs/steelcase/482-amia/steelcase-482-amia-gas-cylinder/
Thank you, greatings from Tyrol!
Our pleasure!
Wow you did not swear or marr it nearly as much as i did. Thanks for the help
lol Glad it helped
I have a new remastered Aeron that has a play or wobble in the cylinder that gives like 6-7 mm movement on the top of the chair, and you can feel it's in the cylinder, is that normal?
That does not sound normal based on the description - can you email over a video of what's going on there to contact@crandalloffice.com ? We'd be happy to take a look and see if we can help! :)
@@CrandallOfficeFurniture thank you very much for that! I have sent an email!
Did you figure out what made your chair wobble? I'm having the same issue. My aeron gaming chair tilts front to back and side to side. It's driving me nuts! Please help!
First - great video - thank you!
STILL STUCK?
Pipe wrench and 3' cheater pipe - no dice - would not budge
Disassemble chair to get to top of cylinder by removing seat and cylinder adjuster - use a socket and hammer to try and dislodge that way - would not budge.
Use 10ton king pin press on top of cylinder and it popped out with relative ease.
Just take lots of pictures if you dissemble your chair - as there are a bunch of parts to keep track of. You'll be an expert on them when done however =)
Wow! That was in there.