How To Fix A Sinking Office Chair

Ergonomic Chair

How To Fix A Sinking Office Chair

By Odinlake Official
February 05, 2023


Your office chair keeps sinking down, and you're tired of always having to adjust it. You could buy a new chair, but why throw away good money if you don't have to? All the parts in your office chair are designed to last for years; however, if your chair does begin to malfunction, there are ways you can fix the problem yourself at home.

If your office chair keeps lowering itself, the fix is in your hands.

If your office chair keeps sinking, the fix is in your hands.

First things first: If you're dealing with a major issue, such as a broken spring or loose casters, it's probably best to call an expert. But if you're dealing with something minor—like if the seat has lifted up and left an inch of space between it and the base or if one of the legs has slipped out from under the chair—then read on! Here are some tips for how to get back on track:

The chair's height is controlled by a pneumatic cylinder.

The pneumatic cylinder is a sealed unit located at the bottom of the swivel base. It's connected to the top of the swivel base via a rod that runs through its center. The cylinder itself controls how high or low your chair can go, and it's made up of two parts:

  • A piston with a rubber seal around it. This part moves up and down inside another chamber with air in it. When you push down on this chamber's outer wall, you compress that air, which pushes against your weight when you sit in your chair and makes it go up or down depending on what setting you've chosen for it (usually between 4-8 inches).

  • A spring-loaded valve that regulates how much air goes into that first chamber from outside sources like turning knobs or pushing buttons on an electronic control panel on some chairs' armrests.

To fix the problem, push on the swivel base of the chair while you lift up on the seat.

  • Push on the swivel base of the chair while you lift up on the seat.

  • Continue to apply pressure until you hear a click or feel it lock into place.

If this process seems too complicated, or if there is any other reason why you don't feel comfortable fixing your office chair yourself, seek help from a professional furniture repair shop in your area.

If you’re unsure how to fix your office chair, but are still curious about how it works, here is a video that shows the process:

Continue to lower and raise the seat while applying pressure until you hear air escaping from the cylinder.

If the piston rod continues to remain stuck, try lowering and raising the seat while applying pressure until you hear air escaping from the cylinder. This can be done by removing the screws that hold on the back of your office chair (or underneath it) and using something flat like a screwdriver or coin to push down on a small metal piece in order to allow air into or out of it.

If you hear no sound when trying this method then either there's something wrong with your piston rod itself (it's broken), or it isn't turning because there's dirt buildup around its gear teeth. If this is happening then you'll need to remove all screws holding on your backplate (so that way nothing interferes with gears). After removing those screws try rotating each gear separately until they start moving freely again--if they are still stuck after doing so then you need new parts!

At this point, pull up on the seat and the piston rod will pop out of the cylinder.

At this point, pull up on the seat and the piston rod will pop out of the cylinder.

Now that you have removed the piston rod, apply lubricant to all surfaces of it. If you don't have any lubricant handy, try using candle wax or petroleum jelly instead—just be sure to wipe off any excess after applying it!

Next, insert your new replacement piston rod into its proper place inside your chair's cylinder. Take care not to force anything; if there is resistance at this point then stop immediately! You may need more lubricant (or perhaps even some WD-40).

Now that everything is properly aligned and inserted back into place, turn a small handle on your cylinder until it reaches an appropriate level for comfort and stability. Make sure everything is snug before using or testing out this fix; if something feels loose then tighten up whatever needs tightening first before moving onto another step in order

You'll probably see a lot of dust inside, which can be removed with compressed air or a wet rag.

If you’re lucky, you’ll see a lot of dust inside your office chair. This is good news because it means your chair hasn’t been used for quite some time and there isn't much to worry about. Remove all the dust with compressed air or a wet rag (a vacuum cleaner does the trick too).

Coat all of the piston rod's surfaces with lubricant and drive it back into place with a rubber mallet.

To fix a sinking office chair, you’ll need:

  • A pair of pliers

  • A rubber mallet or hammer

  • Lubricant (WD-40, silicone spray)

  • Coat all of the piston rod's surfaces with lubricant and drive it back into place with a rubber mallet. This can be tricky because some chairs have an adjustment ring holding the piston rod in place and you’ll have to remove it before pushing it back up into position. Also make sure that the piston rod is pushed all the way into place—if not, then your chair will still be sinking!

To adjust the chair height, simply turn a small handle located on the side of the base

To adjust the height of your chair, find a small handle on the side of the base. It may be harder to see if you're sitting in front of it—but there should be one, trust us!

Turning this handle will give you more or less room under your desk (and therefore more or less space between your legs). The higher up you go, the more wiggle room there will be. To make things easier on yourself, try to aim for a height where only half of each leg is touching the ground—this is a good starting point that won't leave too much of an adjustment in either direction when you sit down.

If this feels uncomfortable at first, don't worry; it's just because we're used to being able to sit comfortably with both feet on the ground while working at our desks! If necessary, move around until everything feels right before getting started on anything important.

You don't need to buy a new office chair if yours sinks down too far

If your office chair has started to sink down too far, you don't have to buy a new one. There are a few things that could be causing this problem and fixing it is easy.

  • The wheels might be loose or broken. This can cause your chair to rock back and forth under you, which makes it look like the chair is sinking on its own. If this is what's going on, tighten the screws or replace them entirely with new ones if they're broken off or stripped out of their holes.

  • The seat may be worn out and needs replacing with a brand new one (if so, we've got some great options for you here).

  • Your office floor may not be level: if so, adjust the legs on your chair until each one sits flat on the floor when it's placed at an equal distance from all four corners of an imaginary rectangle made by drawing lines between two adjacent legs; alternatively try adjusting how high off of the ground each leg rests (and if all else fails bring in some lumber under each leg).


Hopefully these steps will help you repair your sinking office chair and put an end to those embarrassing moments in front of your coworkers. Remember that if the problem persists after following these instructions, it might be time for a new chair!

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