Slow Lifting and Lowering of Office Chairs

Slow lifting and lowering of office chairs are usually related to the aging of the gas lift or seals, which can be resolved through targeted repairs or component replacements.

Common Causes

1. Decline in Gas Lift Performance
   The gas lift is the core component for the lifting and lowering of office chairs, with its power system consisting of nitrogen gas and lubricating oil inside. After more than 3 years of use, the seals can harden, leading to gas leakage or uneven distribution of lubricating oil, which increases lifting resistance. If the gas lift emits a hissing sound or shows surface rust, it requires thorough inspection.
2. Abnormal Locking Mechanism
   Some chairs are equipped with a lifting lock function. If the locking switch is damaged, the spring fails, or there is internal jamming, it may mistakenly trigger the locked state, obstructing normal lifting and lowering.
3. Accumulation of Dirt or Foreign Objects
   Dust, hair, and other foreign objects entering the gaps between the gas rod and the lifting mechanism, or the formation of oil residue from dried lubricant, can directly increase mechanical friction, causing lifting and lowering to become sluggish.
4. Insufficient Lubrication
   When the telescopic rod and connecting shaft of the gas lift lack lubrication, the friction between metals increases significantly, especially in low-temperature environments, making lifting and lowering more difficult.

Solutions

1. Adjust the Resistance Knob
   Some gas lifts have a resistance adjustment ring at the top. Turning it counterclockwise by 1-2 circles can reduce the lowering resistance, suitable for minor jamming situations.
2. Lubricate the Seals and Telescopic Rod
   Use a cotton swab to apply a small amount of silicone grease (avoid using corrosive lubricants like engine oil or WD-40) evenly on the surface of the gas lift's telescopic rod and seals to restore lubricity.
3. Check and Unlock the Mechanism
   Ensure the locking switch is in the “unlocked” position. If jammed, gently tap the seat or shake the gas lift to help the internal parts reset.
4. Clean Internal Components
   Use a vacuum cleaner or a soft-bristled brush to clean the dust around the gas rod. For stubborn dirt, wipe with a slightly damp cloth, avoiding moisture from seeping inside.
5. Lightly Tap to Promote Lubricant Distribution
   After removing the seat cushion, lightly tap the top interface of the gas lift 3-5 times with a rubber mallet to allow the internal lubricant to re-coat the friction surfaces (effective for new chairs or minor jamming).
6. Replace the Gas Lift
   If the chair has been used for more than 5 years, or if gas leakage or a hissing sound is detected during lifting and lowering, replace it with a Class 4 gas lift that meets ISO 7176 standards (with a diameter of ≥38mm and a design life of ≥100,000 cycles), ensuring the seals are not twisted during installation.

Preventive Measures

• Control Usage Load: Individuals weighing over 90kg should avoid frequent rapid lifting and lowering to reduce seal wear.
• Standardize Operating Habits: Maintain a steady speed when lifting and lowering, avoiding excessive force or pulling the seat at an angle.
• Regular Maintenance: Apply lubricating grease to the wheel axles and metal friction surfaces annually, and store in a dry and ventilated environment to prevent component rusting.