988 Office Chair Installation

The installation of the 988 office chair should be carried out in accordance with the specific model characteristics. Below are the general installation steps and precautions:

I. Basic Installation Process

1. Installation of Casters and Gas Lift

   • Align the five casters (universal wheels) with the holes on the five-star base and press them vertically until they are fully engaged, ensuring that the wheels rotate smoothly.
   • Insert the gas lift (height-adjustable column) vertically into the central hole of the five-star base and press it gently to the bottom for fixation. Note that the height-adjustment end of the gas lift should face upwards.

2. Connection of Seat Cushion and Armrests

   • Use six M6*25mm screws to secure the left and right armrests to both sides of the seat cushion. Align the holes and tighten them one by one to avoid tilting.
   • If the armrests are adjustable, install the adjustment controls (such as wrenches or buttons) simultaneously to ensure normal functionality.

3. Assembly of Backrest and Seat Plate

   • Insert the backrest rod (backrest support rod) into the hole on the seat plate at the bottom of the seat cushion and tighten it with a nut from underneath the seat plate to ensure that the backrest does not wobble.
   • If the backrest includes a lumbar support or adjustable components, adjust them to the initial positions according to the instructions before tightening.

4. Installation of Headrest (if applicable)

   • Refer to similar models (such as the 998 ergonomic chair) and use two M6*25mm screws to secure the headrest to the top hole of the backrest. Align the direction before tightening.
   • For some headrests, insert them into the clips first and then secure them with screws, depending on the actual structure.

II. Key Precautions

• Verification of Tools and Accessories: Before installation, count the number of screws, wrenches, and other accessories to avoid running out of parts during the process. Screw specifications such as M625mm and M620mm must match strictly, as misuse may lead to structural instability.
• Safe Operation Practices: For large-component assembly (such as connecting the backrest and seat cushion), it is recommended to have two people cooperate to prevent parts from slipping and causing injuries. On hard floors, lay down soft cloths or cardboard to avoid scratching the chair wheels or the floor.
• Function Testing: After installation, check whether the functions of the gas lift, armrest adjustment, headrest angle, etc., are normal, and whether the wheels rotate smoothly, ensuring no abnormal noises or jams.

III. Handling Special Cases If the structure of the 988 model differs significantly from that of the reference model (such as the 998), follow the product instructions first. Some brands provide exclusive installation videos, which can be obtained by scanning the QR code on the instructions or contacting the seller. If installation instructions for components such as the headrest or footrest are missing, pause the operation and consult after-sales service to avoid damage caused by forced assembly.