How to Fix a Stuck Office Chair

Resolving a stuck office chair requires addressing the specific faulty part. Here are common issues and solutions:

1. Stuck or Noisy Height Adjustment
   If the chair makes noise or gets stuck when adjusting the height, distinguish the type of gas lift:

• Gas lift: Do not lubricate the gas lift itself directly. Focus on the metal friction surface where the base connects to the gas lift. Clear away dust and apply a small amount of grease.
• Screw lift: If the screw-type height adjustment mechanism is stuck, spray WD-40 lubricant onto the adjustment knob or screw rod. Turn the knob repeatedly until it loosens. Avoid using excessive lubricant to prevent contamination.

2. Inflexible Swivel
   When the swivel track on the base becomes stiff due to long-term use or dust accumulation, evenly apply white lithium grease (recommended viscosity grade NLGI 2) to the track surface. After application, rotate the seat several times to allow the grease to penetrate fully, restoring smooth swiveling.

3. Loose or Difficult-to-Adjust Armrests
   If the internal rack of the armrest height adjustment latch is jammed due to wear or dust ingress, disassemble the armrest (some models may require professional tools). Apply a tiny amount of grease to the rack surface, reassemble, and test the adjustment smoothness. Avoid getting grease on the armrest surface.

4. Failed Backrest Rebound
   If the plastic gear set of a synchronized backrest loses rebound force due to long-term use or insufficient lubrication, use food-grade grease (to avoid staining clothes) and apply it to the gear engagement area. Manually adjust the backrest angle repeatedly to distribute the grease evenly and restore elasticity.

5. Poor Wheel Rolling
   When the wheel axle is obstructed by dust or tangled hair, first clear debris from the axle gaps (e.g., use tweezers to remove hair). Then, use a cotton swab to apply a small amount of grease to the axle, avoiding grease drips that could stain the floor.

6. Gas Lift Failure
   If the gas lift shows oil stains or signs of air leakage on its surface, indicating internal seal failure, stop using it immediately and replace it with a new gas lift. During regular use, avoid exceeding a load of 120 kilograms, as prolonged overloading may permanently damage the gas lift.

7. Control Component Issues

• Stuck handle: Try rotating the handle to its extreme positions (e.g., highest or lowest gear), which may activate the internal mechanism. If ineffective, check if the handle connecting rod is deformed or broken.
• Electric chair panel failure: Check if the control panel indicator light is on. If not, troubleshoot the power supply or replace the panel. If the indicator is on but functions fail, it may be a motor or sensor issue, requiring after-sales repair.

8. Mechanical Part Jamming
   If gears or axles in the base are jammed by foreign objects like hair or paper scraps, use tweezers or a fine brush to clear the debris. Apply grease to gears, axles, and other parts, and tighten all loose screws. If gears are misaligned, use a screwdriver to slightly adjust the base screws to restore gear engagement.