How to Repair an Office Chair

Lay the chair horizontally on a work surface.

Remove the wheeled base of the chair by undoing clips fastening the wheeled base to the column of chair. Some chair bases are fastened by metal nuts and bolts rather than clips. In this case, use a wrench to loosen and then remove the nuts. Unscrew the bolts y hand.

Inspect the inside of the chair column to make sure no chair parts other than the gas cylinder are broken. If metal nuts, rubber pads, or other chair parts are worn down, replace them along with gas cylinder.

Fit the pipe wrench to the gas cylinder. Turn and pull the pipe wrench to remove gas cylinder. Most chair cylinders are taper-fit rather than screw in, so the cylinder will loosen when turned in any direction.

Insert the tapered end of the new gas cylinder into the chair column. Some gas cylinders have a "release button" that cause the taper to expand after it has been inserted into the chair column. Other tapers must be rotated by hand until they fit snugly into the column.

Re-attach the base of the chair to the column.

Test the newly inserted gas cylinder to be sure that the chair height is now adjustable, and that the chair maintains its new height when pressure is applied to the seat.