Repair of Office Chair Rocking Damage

Office chairs that are rocking can be repaired in a targeted manner based on the specific causes. Here are the common causes and repair methods:

Loose Screws

Identify the areas where the rocking is most noticeable when sitting. Focus on checking the screws on the inner side of the armrests, the bottom of the seat cushion, and the interface between the base and the gas lift. Use a screwdriver or wrench to loosen the loose screws counterclockwise. Spray a small amount of WD40 around the screw holes for lubrication and rust removal, and then tighten them clockwise. If the screw holes are enlarged due to wear, take a toothpick or a thin wooden stick, dip it in white glue, and insert it into the hole. After the glue dries, screw the screw back in.

Gas Lift Issues

• Wear or Air Leakage: If the gas lift pops out or sags, it may be due to deformation or loss of the bottom retaining clip or accessories. Search for 'gas lift accessories' on e-commerce platforms and purchase a universal replacement retaining clip to install. If the chair wobbles significantly during rotation or when bearing weight, the inner plastic sleeve at the connection between the gas lift and the chassis may be worn and aged. Purchase a replacement sleeve of the corresponding size. If the chair sinks automatically when someone sits on it, it indicates a leakage in the nitrogen unit or valve inside the gas lift, and the entire gas lift needs to be replaced. When replacing, look for certification stamps such as SGS and BIFMA, and choose brands like Weiyasi, Sanhong, and Xieqiang. Accurately measure the total length, outer tube diameter, and inner tube diameter of the old gas lift to ensure a perfect match with the new part.
• Steps for Replacing the Gas Lift: Spray WD40 on the connection between the gas lift and the base, and let it sit for 1 minute. Use a hairdryer on the hot air setting to blow on the connection. Use a heavy-duty pipe wrench to grip the gas lift, rotate it counterclockwise, and pull out the old lift with force. Clean the installation hole in the base, insert the new gas lift vertically, and tap it gently with a hammer to secure it.

Base Deformation or Component Wear

Open the bottom cover and check if the plastic clips are brittle and broken or if the wheel axles are misaligned. If the clips are loose, use pliers to reset them. If the plastic parts are shattered or the wheels are severely tilted, replace the entire chassis assembly directly, ensuring to choose a compatible part of the same model.

Wheel Issues

Check if the wheels are uneven when the chair is placed upright and upside down. If one of the wheel feet that can rotate vertically and horizontally at the bottom of the chair is bent or deformed, the chair will tilt towards that direction. If damaged wheels are found, purchase a new set of matching wheels. You can contact the chair manufacturer for the model number to order matching wheel feet or remove an old wheel and take it to an office supplies store to find a matching replacement set, paying attention to the shape and size of the wheel axles. When removing the casters, hold the wheel of the caster with one hand and the bottom of the chair with the other hand and pull hard. If it doesn't come out, insert the blade of a flat-head screwdriver into the small gap between the wheel foot and the chair, operate it back and forth slowly, pull it out about 1 centimeter, and then pull the wheel foot again. In rare cases, the casters are fixed with screws, so use a screwdriver to loosen the screws and remove the casters.

Seat Plate Issues

If the chair is still tilted, place the chair on its side and locate the metal seat plate (usually a roughly square-shaped black painted steel plate located at the bottom of the chair seat, connecting the cylindrical column that serves as the single leg of the chair to the seat plate) and check for any damage.