The Office Chair is Loose

Repairing a loose office chair requires targeted measures based on the specific part affected. Here are common issues and their solutions:

If the Backrest is Loose

1. Identify the Loose Location

   • Test the degree of wobble when leaning back in the chair: If there is a clicking sound, it is likely that the adjustment rod screws are not tightened properly; if the rebound is weak, the spring or gas lift may be aging.
   • Check the connection between the backrest and the base: Observe whether the screws are loose, whether the plastic clips are broken, or whether the gap in the gas lift is too large.

2. Targeted Repair Solutions

   • Loose adjustment rod screws: Use a Phillips screwdriver to rotate the plastic cover at the base connection counterclockwise. After exposing the metal bracket, use a wrench to tighten the 6-8 fixing screws one by one (operate symmetrically at 90° intervals to prevent uneven force).
   • Spring detachment: Locate the spring pin at the bottom of the backrest and use needle-nose pliers to reinsert the slipped spring hook into the slot; if the spring is deformed, measure its length and purchase a replacement spring with a diameter of 3-5mm online (price range: approximately 5-15 yuan).
   • Excessive gap in the gas lift: Remove the dust cover at the bottom of the seat, find the black plastic adjustment knob, and rotate it counterclockwise to increase support force. Test the rebound resistance in stages of 30°.

3. Check Connectors

   • Use a Phillips screwdriver or an Allen wrench to tighten the screws connecting the backrest to the base (located under the seat or at the folding part of the backrest) clockwise; if the screw holes are stripped, fill them with toothpicks and wood glue or replace them with larger-diameter screws.

4. Adjust Tilt Resistance

   • Locate the circular knob or dial at the bottom of the chair and rotate it counterclockwise to the maximum resistance setting. Sit back and test the tightness, adjusting repeatedly until it feels right.

5. Replace Damaged Parts

   • If the gas lift makes noise when raising or lowering, replace it with a gas spring that meets TUV or SGS certification; if the plastic clip on the backrest is broken, use AB glue for temporary fixation, but it is recommended to purchase original factory parts for replacement.

If the Chair Leans to One Side as a Whole

1. Check the Wheels

   • Place the chair upright and confirm that each wheel touches the ground; invert the chair to check if the wheels are damaged (e.g., bent or broken). If the ground is uneven, adjust the position of the chair or replace the wheels.

2. Replace Damaged Wheels

   • Contact the manufacturer to provide the model number for ordering matching wheels, or take the old wheels to an office supplies store to match a replacement set, paying attention to the shape and size of the wheel axles.

3. Remove Old Casters

   • Pull out the wheels by hand; if they are stuck, insert a flathead screwdriver into the small gap between the wheel and the chair, slowly pry until the wheel rod is exposed by 1 cm, and then pull it out again; if the wheels are fixed with screws, use a screwdriver to loosen the screws and remove them.

4. Lubricate the Sockets

   • Spray a lubricant such as WD-40 on the sockets at the base of the chair (half a second for each socket) or apply a pea-sized amount of Vaseline.

5. Install New Casters

   • Use a rubber mallet to lightly tap the caster rod until it is fully inserted into the base, avoiding tapping the bottom of the wheel to prevent deformation.

6. Test the Repair Effect

   • Invert the chair and sit on it to test whether the rolling is smooth; if it still leans, check whether the seat plate is damaged.