Introduction
Thank you for choosing the LEAGOO Ergonomic Executive Office Chair, Model YMX-C575-1. This manual provides detailed instructions for assembling, operating, and maintaining your new office chair. Please read all instructions carefully before use to ensure proper function and safety.

Figure 1: LEAGOO Ergonomic Executive Office Chair (Model YMX-C575-1) in a home office setting.
Important Safety Information
- This product is not a toy. Children are prohibited from climbing, hanging, or playing with this product to prevent accidental injury.
- Ensure all screws and bolts are tightened securely before using the chair. Periodically check and re-tighten as necessary.
- Do not stand on the chair.
- Do not use the chair if any parts are damaged or missing. Contact customer support for replacement parts.
Package Contents
Before assembly, verify that all components are present and undamaged. Refer to the image below for a visual guide of the parts included.

Figure 2: All components of the LEAGOO C575 office chair laid out in their packaging for assembly.
- Backrest
- Seat Cushion
- Armrests (2)
- Base (5-star)
- Casters (5)
- Gas Lift Cylinder
- Seat Plate Mechanism
- Hardware Kit (screws, washers, Allen wrench)
- Lumbar Support Pillow
Setup and Assembly
Follow these steps to assemble your LEAGOO Ergonomic Executive Office Chair. It is recommended to watch the official assembly video for visual guidance.
Official Assembly Video
Video 1: Step-by-step assembly guide for the LEAGOO C575 office chair.
Step-by-Step Instructions:
- Assemble the Chair Base:
- Insert the five casters into the holes at the end of each leg of the 5-star base. Push firmly until they click into place.
- Place the gas lift cylinder into the central hole of the assembled base.
- Attach the Seat Plate Mechanism:
- Align the seat plate mechanism with the screw holes on the underside of the seat cushion. Ensure the "FRONT" arrow on the mechanism points towards the front of the seat.
- Secure the mechanism using the provided screws and the Allen wrench. Tighten all screws firmly.
- Connect Seat to Base:
- Carefully place the assembled seat cushion onto the gas lift cylinder, ensuring it is centered and stable.
- Attach Armrests to Backrest:
- Identify the left and right armrests. Align each armrest with the corresponding screw holes on the backrest.
- Secure the armrests to the backrest using the provided screws. Do not fully tighten at this stage.
- Attach Backrest Assembly to Seat:
- Align the armrests (which are now attached to the backrest) with the screw holes on the sides of the seat cushion.
- Insert the remaining screws and washers. Once all screws are in place, fully tighten all screws on the armrests and backrest.
- Final Touches:
- Attach any decorative caps over exposed screw heads.
- Place the lumbar support pillow on the backrest for added comfort.
Operating Instructions
Your LEAGOO Executive Office Chair offers several adjustable features for personalized comfort. For a visual overview of the chair's features, please watch the video below.
Product Features Overview
Video 2: Overview of the LEAGOO C575 Ergonomic Office Chair's key features.
1. Seat Height Adjustment
To adjust the seat height:
- To raise the seat, lift the lever on the right side of the seat while taking your weight off the chair.
- To lower the seat, lift the lever while remaining seated.
- Release the lever to lock the seat at the desired height.

Figure 3: Chair dimensions and adjustable height range.
2. Reclining and Rocking Function
The chair features a 15° rocking function for relaxation.
- To enable the rocking function, pull the control lever (typically the same lever used for height adjustment) outwards.
- To lock the chair in an upright position, push the lever inwards.
- The chair can recline from 90° (work mode) to 105° (rest mode).

Figure 4: Reclining function from 90° work to 105° rest.
3. 3D Flip-up Armrests
The armrests are designed for versatility and space-saving.
- To flip up the armrests, simply lift them upwards. They can be raised to a 45° angle, allowing the chair to slide under a desk and save space.
- The armrests also offer 1.18" height adjustment and the cushioned panels can be shifted 1.57" forward or backward.

Figure 5: Details of the 3D flip-up armrests.
4. Ergonomic Curved Backrest
The mid-back design features a contoured arc that conforms to your lower spine, providing lumbar support and relieving back fatigue.

Figure 6: Ergonomic curved backrest for lumbar support.
Maintenance
- Cleaning: Wipe clean with a damp cloth. Avoid harsh chemicals that may damage the faux leather.
- Inspection: Periodically check all screws and connections to ensure they are tight. Re-tighten as needed to maintain stability and safety.
- Caster Care: Keep casters free of debris (hair, dust, etc.) to ensure smooth rolling.
Official Disassembly Video (for reference)
Video 4: Guide on how to disassemble the LEAGOO C575 office chair.
Troubleshooting
- Chair is wobbly: Ensure all assembly screws are fully tightened. Check the connection between the seat plate and the gas lift.
- Chair does not adjust height: Verify the gas lift lever is functioning correctly. If the gas lift is faulty, it may need replacement.
- Casters do not roll smoothly: Check for hair or debris wrapped around the caster wheels and remove them.
Specifications
| Feature | Detail |
|---|---|
| Brand | LEAGOO |
| Model Name | YMX-C575-1 |
| Material | Faux Leather, Cotton Fill |
| Color | Beige |
| Product Dimensions | 22.44"D x 27.55"W x 40.16"H |
| Maximum Weight Recommendation | 300 Pounds |
| Special Features | 3D Flip-up Armrest, Adjustable Height, Ergonomic Curved Backrest, Rocking Function, Upholstered Leather |
| Certifications | SGS certified gas lift, BIFMA certified heavy-duty base |
Warranty and Support
LEAGOO FURNITURE provides one year of after-sales service support for customers who purchase this computer desk chair. Our customer service team is available to assist with any pre-sales or after-sales inquiries. Please do not hesitate to send an email to us for assistance.
For further assistance, please visit the LEAGOO Store on Amazon.