Huichun Office Chair Repair

Repairing office chairs in Huichun requires targeted measures based on the specific type of fault. Common problems and their solutions are as follows:

I. Repair Methods for a Loose Backrest

A loose backrest is often caused by loose screws, aging gas cylinders, or worn connecting parts. The following steps can be used for troubleshooting:

1. Check the screws: Straighten the backrest and shake it left and right. If there is a creaking sound or noticeable displacement, first check the cross or hex screws at the connection between the backrest and the base, as well as the bottom of the armrests. Use a screwdriver or wrench to tighten the screws clockwise. If the screw hole is stripped, fill it with thin wire or toothpicks to increase friction.
2. Adjust the support device: If the entire backrest sinks or lacks rebound force, check the circular knob at the bottom of the chair (marked with the words 'Tilt Tension'). Rotating the knob counterclockwise can increase the support force. If adjustment is ineffective, the internal spring assembly may need to be replaced.
3. Replace the gas cylinder: Slowly raise and lower the chair to test its stability. If the height cannot be fixed or it slides down automatically, the gas cylinder needs to be replaced (the model is marked on the side of the cylinder). When disassembling, invert the chair and gently tap the base with a rubber mallet to detach it from the snap-fit, avoiding sudden ejection of the gas cylinder.

II. Repair Methods for a Backrest That Cannot Stand Upright Due to Hydraulic System Failure

If the backrest cannot be fixed or falls backward, focus on checking the hydraulic system:

1. Check the hydraulic rod: Observe the hydraulic system at the bottom of the chair to confirm whether there is a failure in the extension and retraction of the hydraulic rod. If the hydraulic rod is severely leaking oil or deformed, it is recommended to directly replace it with a new rod (matching the model). Non-professionals should not disassemble core components to prevent high-pressure oil from spraying.
2. Check the transmission parts: Lay the chair on its side and start checking the transmission parts from the backrest. Test whether the pull-tab function is normal. If the hydraulic mechanism detaches directly when pulling the pull-tab, focus on checking the fixing structure.
3. Repair or replace the screws: Confirm that the original fixing screws are of the non-standard 10*1 specification and can be replaced with standard No. 10 screws. When dealing with the threads, use a tap tool to repair them or directly use a wrench to screw in the screws (choose a length of 30 mm, slightly longer than the original). After screwing in, add a nut to ensure tightness. If the movement of the hydraulic rod is obstructed by the screws, add a gasket (the thickness is selected according to the actual gap).
4. Test the function: After the repair is completed, put the parts back in their original positions, stand the chair upright, and repeatedly adjust the angle of the backrest to confirm that it can be fixed at any position. Also, check whether the extension and retraction of the hydraulic rod are smooth, without jamming or abnormal noises.

III. Recommended Professional Repair Services

If self-repair is difficult, you can contact Huichun Onaite Industrial and Trading Co., Ltd. (whose business scope covers furniture installation and repair) for professional repair services. When operating, wear protective gloves to avoid scratches from metal parts.