Introduction
Thank you for choosing the WOLTU Ergonomic Office Chair BS161be. This manual provides essential information for the safe assembly, operation, maintenance, and troubleshooting of your new office chair. Please read these instructions carefully before use and retain them for future reference.
Safety Warnings
- Ensure correct assembly by following the provided instructions precisely. Improper assembly can lead to instability and injury.
- Do not exceed the maximum recommended weight capacity of 150 kg (330 lbs) to prevent damage to the chair or personal injury.
- Keep all packaging materials, especially plastic bags, away from children to avoid suffocation hazards.
- Regularly check all screws and connections to ensure they are tight. Retighten if necessary.
- Avoid standing on the chair or using it as a step stool.
- Use the chair only on a flat, stable surface.
- Do not expose the chair to direct sunlight or extreme temperatures for prolonged periods, as this may damage the materials.
Package Contents
Please verify that all components are present before beginning assembly:
- Office Chair (main components: seat, backrest, headrest, armrests) x1
- Accessory Kit (screws, washers, tools) x1
- Assembly Manual x1
- Star Base x1
- Gas Lift Cylinder x1
- Casters x5
Setup and Assembly
The WOLTU office chair is designed for quick and easy assembly, featuring an illustrated manual and labeled components. Follow the steps below and refer to the included assembly manual for detailed diagrams.
- Attach Casters to Base: Insert the five casters into the holes at the end of each leg of the star base until they click securely into place.
- Insert Gas Lift: Place the gas lift cylinder into the center hole of the star base. Ensure it is seated firmly.
- Assemble Seat and Mechanism: Attach the seat mechanism to the underside of the seat cushion using the provided screws. Ensure the front of the mechanism faces the front of the seat.
- Attach Armrests: Secure the armrests to the seat cushion using the designated screws.
- Connect Backrest: Attach the backrest to the seat assembly. Ensure all screws are tightened evenly.
- Attach Headrest: Secure the headrest to the top of the backrest.
- Place Seat on Gas Lift: Carefully place the assembled seat onto the gas lift cylinder, ensuring it is centered and stable.
- Final Check: Verify that all screws are tightened and the chair is stable before use.

Image: The WOLTU Ergonomic Office Chair viewed from various angles, highlighting its design and key components for assembly reference.
Operating Instructions
Your WOLTU Ergonomic Office Chair features several adjustable components to customize your seating experience:
- Seat Height Adjustment: Use the lever located under the right side of the seat to adjust the seat height. Pull the lever up to raise the seat (when no weight is applied) or lower it (when seated). The seat height can be adjusted by 8 cm.
- Backrest Tilt Function: The backrest can be continuously reclined between 90° and 110°. Use the lever on the left side to unlock the tilt. Lean back to your desired angle and push the lever down to lock it in place. The chair features a double safety lock for stability.
- Adjustable Lumbar Support: The dynamic lumbar support is adjustable to conform precisely to the curve of your spine, providing optimal lower back comfort. Adjust it by rotating the knob or sliding the support up/down (depending on the specific mechanism).
- 3D Adjustable Armrests: The armrests can be adjusted in three dimensions: up/down, forward/backward, and rotationally. Use the buttons or levers on the armrests to unlock and adjust them to your preferred position, reducing arm and shoulder fatigue.
- Adjustable Headrest: The headrest can be adjusted by 30° and has an 8 cm lift range. Position it to comfortably support your neck and head.
Maintenance
Proper care will extend the life and appearance of your WOLTU office chair:
- Cleaning: For mesh fabric, gently wipe with a damp cloth and mild soap. Avoid harsh chemicals or abrasive cleaners. For the metal frame, wipe with a soft, dry cloth.
- Inspection: Periodically check all bolts, screws, and connections to ensure they are secure. Tighten any loose fasteners.
- Caster Care: Keep casters clean from hair and debris to ensure smooth movement.
- Avoid Overloading: Do not exceed the maximum weight capacity.
- Environmental Conditions: Store and use the chair in a dry environment, away from direct heat sources or prolonged direct sunlight.
Troubleshooting
If you encounter any issues with your chair, refer to the following common problems and solutions:
- Chair is unstable or wobbly:
- Check all assembly screws and bolts. Tighten any that are loose.
- Ensure the chair is on a flat, even surface.
- Gas lift not adjusting height:
- Ensure the height adjustment lever is fully engaged or disengaged as required.
- Verify that the gas lift cylinder is correctly inserted into the base and seat mechanism.
- Casters not rolling smoothly:
- Check for debris (hair, dust, etc.) caught in the casters and clean them.
- Ensure casters are fully inserted into the star base.
- Squeaking noises:
- Tighten all screws and bolts.
- Apply a small amount of silicone lubricant to moving parts if necessary, avoiding contact with fabric.
Specifications

Image: Detailed dimensions of the WOLTU Ergonomic Office Chair, illustrating height, width, and depth for user reference.
| Feature | Detail |
|---|---|
| Model Number | BS161be |
| Brand | WOLTU |
| Color | Beige |
| Materials | Mesh Fabric, Metal Frame, PU Casters, Sponge, PP |
| Overall Dimensions (L x W x H) | 62 x 69.5 x (116-123.5) cm (24.4 x 27.4 x (45.7-48.6) inches) |
| Seat Height | 46-54 cm (18.1-21.3 inches) |
| Seat Size (W x D) | 49 x 50 cm (19.3 x 19.7 inches) |
| Backrest Height | 71 cm (28 inches) |
| Base Diameter | 67.5 cm (26.6 inches) |
| Weight Capacity | 150 kg (330 lbs) |
| Net Weight | Approx. 11.93 kg (26.3 lbs) |
| Certifications | BIFMA, SGS |
| Special Features | Adjustable Headrest, Adjustable Backrest, Ergonomic Design, Adjustable Height, 3D Adjustable Armrests, Dynamic Lumbar Support, Tilt Function (90°-110°) |
Warranty and Support
WOLTU is committed to providing high-quality products. For specific warranty details, please refer to the documentation included with your purchase or visit the official WOLTU website. If you have any questions, require assistance with assembly, or need to report a defect, please contact WOLTU customer support.
WOLTU Official Store: Visit WOLTU Store on Amazon