Office Chair Jamming

The jamming of an office chair needs to be addressed according to the specific type of fault. Common situations and solutions are as follows:

Jammed Casters/Wheels

Cause: Hair, yarn, or dust on the ground have been entangled around the wheel axle for a long time, causing rotation obstruction. Solution:

1. Turn the chair upside down. Insert two flat-head screwdrivers from both sides of the caster near the wheel axle, and apply even force to pry the snap ring out and remove the caster.
2. Pull out the wheel axle (if it is tight, you can use a small hammer to tap it gently for assistance), and thoroughly clean the entangled hair and fibers.
3. Reinstall the caster and ensure that the snap ring is in its original position. Turn the chair back over and test if it moves smoothly.

Malfunctioning Height Adjustment

Cause:

1. The adjustment handle or knob is locked.
2. The seal ring of the gas lift is worn, nitrogen leaks, or the cylinder of the height adjuster leaks air. Solution:
3. Check and loosen the adjustment handle or knob at the bottom.
4. If the gas lift is faulty (such as being unable to adjust the height or slowly sinking), the entire gas lift needs to be replaced.
5. If the chair cannot be lowered, drip 1-2 drops of engine oil around the air release button at the top of the cylinder to enhance the sealing performance.
6. Note during operation: To raise the chair, it should be unoccupied; to lower it, someone should sit on it to provide weight.

Inflexible Rotation or Abnormal Noise

Cause: The track of the base turntable lacks lubrication, and the metal parts are in dry friction. Solution: Apply an appropriate amount of silicone-based grease or white lithium-based grease, and repeatedly rotate the seat to evenly distribute the lubricant. Avoid using oily lubricants (which easily attract dust).

Unable to Return to Upright Position After Reclining

Cause:

1. The control lever is accidentally pushed in or not fully pulled out, causing the locking tongue to jam.
2. Foreign objects (such as clothing or data cables) are stuck in the gap between the backrest axle and the base.
3. Mechanical failure (such as damage to the hydraulic rod, wear of the locking block/tongue, or failure of the spring). Solution:
4. Clean the foreign objects in the gap between the bottom of the backrest axle and the base.
5. Find the control lever under the seat, fully pull it out and hold it. The backrest should rebound to the upright position under the action of the spring. After resetting, push the control lever back to lock the angle.
6. If the backrest still cannot rebound, manually assist in pushing it back and check the spring tension. If the spring is weak, it needs to be replaced.
7. Apply lubricant to the stiff parts (such as the connection axle of the control lever and the base).