Large Office Chair Repair

Large office chair repair requires targeted handling based on the specific type of fault. Common issues and repair steps are as follows:

I. Hydraulic System Fault Repair

Hydraulic system faults are common in large office chairs, typically manifesting as the backrest being unable to stand upright or adjust in height. Repair steps are as follows:

1. Fault Confirmation: Place the chair on a flat surface and check if the hydraulic rod at the bottom is leaking oil, loose, or stuck. If there are oil stains on the surface of the hydraulic rod, it may be due to aging of the seal ring causing oil leakage; if there is no response when pressing the adjustment button, it may be due to a stuck piston inside or insufficient air pressure.
2. Transmission Component Inspection: Lay the chair on its side and observe whether the transmission components (such as the拨扣 (toggle button, here we can translate it as 'toggle mechanism' for better understanding in English context, but keep original term in mind for exact repair if needed), gears) at the connection between the hydraulic rod and the seat are damaged or displaced. If the toggle mechanism is broken, replace it with a component of the same model; if the gears are worn, clean any debris or adjust the meshing position.
3. Hydraulic Mechanism Fixing: If the connection between the hydraulic rod and the base is loose or has fallen off, replace the fixing screws. For example, a non-standard 10*1 screw may break due to insufficient strength and needs to be replaced with a standard No. 10 screw (10mm in diameter, 1.5mm pitch), ensuring the screw length is 30mm to match the depth of the mounting hole.
4. Range of Motion Adjustment: When installing the screws, if the hydraulic rod's range of motion is restricted, adjust the gap by adding shims (such as rubber or metal shims). The thickness of the shims should be selected based on the actual degree of looseness, generally ranging from 0.5-2mm, to avoid excessive thickness causing structural instability.

II. Other Common Fault Repairs

In addition to the hydraulic system, office chairs may also experience issues such as paint wear, leather damage, or structural looseness due to long-term use. Repair methods include:

1. Paint Repair: Use self-spray paint or wood paint that matches the original paint color number to perform local touch-ups on scratches or areas where the paint has come off. Before touch-up painting, clean the surface and sand it smooth. After spraying, allow it to stand for more than 24 hours to dry completely.
2. Leather Repair: For damage to leather seats, use leather repair paste to fill cracks or cut out a piece of leather in the same color to cover the damaged area and fix it with special glue. After repair, avoid direct sunlight to prevent the repaired area from cracking.
3. Structural Reinforcement: If the chair frame (such as the five-star base, armrests) is loose, check if the screws have fallen out or stripped. For stripped screw holes, inject wood glue or fill with metal inserts to enhance the fixing effect; for broken plastic parts, replace them with components of the same model.

Repair Tip: If the fault involves internal damage to the hydraulic rod (such as a broken piston) or severe structural deformation, it is recommended to contact professional repair personnel for handling to avoid secondary damage caused by self-disassembly.