Yongbo Office Chair

The installation, adjustment, and maintenance methods for the Yongbo office chair are as follows:

I. Installation Steps

1. Installing Wheels on the Five-Star Base
   Vertically press the five wheels into the holes on the base until you hear a 'click' sound indicating they are securely fastened. If the plastic becomes hard in winter, use a hairdryer to heat the interface for 10 seconds before installation to prevent breakage due to material brittleness.

2. Inserting the Gas Lift into the Central Hole of the Five-Star Base
   Insert the end of the gas lift with the brand sticker facing upwards into the central hole of the five-star base by rotating it, rather than pressing it straight down. This operation reduces metal debris residue and extends the service life of the gas lift.

3. Combining the Seat Cushion with the Base

   • Install the adjustment lever into the slot at the bottom of the seat cushion and secure it with an M8*20mm screw.
   • Ensure that the protrusion at the top of the gas lift fits into the recess on the base during alignment to prevent seat wobbling due to misalignment.

4. Installing Armrests and Headrest

   • Armrests are usually designed for insertion. After positioning, tighten the anti-loosening screws from the bottom to prevent them from coming loose during use.
   • After inserting the double rods of the headrest into the backrest, pre-tighten the screws and then adjust to the cervical spine support position to ensure comfort and safety.

II. Adjustment Tips

1. Adjusting the Backrest Recline Force
   The backrest recline knob (marked 'TILT') is usually set to the tightest position initially. Rotating it clockwise reduces the resistance to leaning back, while rotating it counterclockwise increases the resistance. Adjust to a suitable force according to your weight and habits.

2. Eliminating Seat Wobbling
   If the seat wobbles left and right, check whether the four load-bearing screws at the connection between the base and the seat cushion are evenly tightened diagonally. It is recommended to tighten them gradually in three steps (50%→80%→100%) to ensure balanced force distribution.

III. Maintenance and Care

1. Connection Between the Gas Lift and the Five-Star Base
   After three months of use, apply silicone-based lubricant to the connection to eliminate abnormal noises and delay the aging of the seal ring, extending the service life of the components.

2. Dealing with Stuck Wheels
   After cleaning any tangled hair or debris, drip a small amount of sewing machine oil to restore the smoothness of the wheels. Avoid using solvents such as WD-40 to prevent corrosion of plastic components.

3. Regularly Checking Screws
   Check all screws (especially those at load-bearing parts) for looseness every month and tighten them promptly to prevent structural deformation or safety hazards.

Brand Background Supplement: The Yongbo office chair is produced by Bazhou Yongbo Furniture Co., Ltd. Founded in 2017, the company is located in Caiyuan Village, Xin'an Town, Bazhou City, Langfang City, Hebei Province. It specializes in furniture manufacturing, with products characterized by practicality and cost-effectiveness.