Introduction
Thank you for choosing the DUMOS Armless Office Desk Chair. This manual provides essential information for the safe and efficient assembly, operation, and maintenance of your new chair. Please read these instructions carefully before use and retain them for future reference.
Safety Information
Important Safety Warning:
- Do not exceed the maximum weight capacity of 250 pounds.
- Ensure the chair is properly assembled to avoid injury.
- Keep all assembly components away from children.
- Regularly check all bolts and connections to ensure they remain tight.
Package Contents
Before beginning assembly, verify that all parts listed below are present and undamaged. If any parts are missing or damaged, please contact DUMOS customer service.
| Item | Description | Quantity |
|---|---|---|
| A | Backrest | 1 |
| B | Seat | 1 |
| C | Back Bar | 1 |
| D | Mechanism | 1 |
| E | Gas Lift | 1 |
| F | Base | 1 |
| G | Legs | 5 |
| H | Casters | 5 |
| I | Bolts (for Mechanism) | 4 |
| J | Bolts (for Back Bar) | 4 |
| K | Bolts (for Legs) | 10 |
| L | Bolts (for Backrest) | 2 |
| M | Wrench | 1 |
Assembly Instructions
Estimated assembly time: 10 minutes. All necessary tools are included.
Step 1: Assemble the Chair Base
- Turn the Base (F) upside down.
- Insert the 5 Legs (G) into the Base (F) one by one.
- Use the Wrench (M) to secure both with 10 Bolts (K).
- Press the 5 Casters (H) into the holes at the end of the Legs (G).
- Insert the Gas Lift (E) into the center hole of the assembled Base (F).
Image: Product dimensions and load capacity.
Video: Step-by-step assembly guide for the DUMOS Armless Office Desk Chair.
Step 2: Attach Back Bar to Backrest
- Using the Wrench (M), install the Back Bar (C) to the Backrest (A) with 2 Bolts (L).
Step 3: Attach Mechanism to Seat
- Turn the Seat (B) upside down.
- Align the Mechanism (D) with the pre-drilled holes on the underside of the Seat (B). Ensure the "FRONT" marking on the mechanism faces the front of the seat.
- Using the Wrench (M), install the Mechanism (D) to the Seat (B) with 4 Bolts (I).
Step 4: Attach Backrest Assembly to Seat Assembly
- Using the Wrench (M), attach the assembled Backrest (A) with Back Bar (C) to the Seat (B) with 4 Bolts (J).
Step 5: Final Assembly
- Align the hole on the Mechanism (D) with the Gas Lift (E).
- Press the assembled chair down onto the Gas Lift (E) until it is fully secured.
Your DUMOS Armless Office Desk Chair is now ready for use!
Operating Instructions
Height Adjustment
To adjust the seat height, locate the lever under the right side of the seat. While seated, pull the lever up to lower the seat. To raise the seat, stand up and pull the lever up. Release the lever at the desired height to lock it in place.
Swivel Function
The chair features a 360° swivel function, allowing for easy rotation without moving the base. Simply rotate the seat to your desired direction.
Rolling Casters
The five smooth-rolling casters allow for easy movement across various floor surfaces. Ensure the path is clear of obstructions before moving the chair.
Image: Highlighting the adjustable height, sturdy base, and swivel wheels.
Maintenance
Cleaning
The chair is upholstered with high-quality PU leather. To clean, simply wipe with a damp cloth. Avoid using harsh chemicals or abrasive cleaners, as these may damage the material.
Image: Demonstrating the easy-to-clean and breathable PU leather material.
Regular Checks
Periodically inspect all bolts and connections to ensure they are secure. Tighten any loose fasteners to maintain stability and safety.
Troubleshooting
- Chair is wobbly: Check all assembly bolts (K, I, J, L) and tighten them securely. Ensure the casters (H) are fully inserted into the legs (G).
- Height adjustment not working: Ensure the gas lift (E) is properly seated in the base (F) and the mechanism (D). Check that the height adjustment lever is functioning correctly and not obstructed.
- Casters not rolling smoothly: Check for any debris (hair, dust) caught in the casters and clean them. Ensure the casters are properly installed.
Specifications
| Feature | Detail |
|---|---|
| Brand | DUMOS |
| Model Name | DUMOS Armless Office Desk Chair |
| Item Model Number | 2193BK-DUFA-305 |
| Color | Dark Black |
| Product Dimensions | 17.51"D x 18.11"W x 34.25"H |
| Item Weight | 18 pounds |
| Maximum Weight Recommendation | 250 Pounds |
| Material | Faux Leather, Metal, Sponge |
| Special Features | Adjustable Height, Ergonomic, Rolling, Space Saving |
| Back Style | Solid Back with Lumbar Support |
| Arm Style | Armless |
| Furniture Base Movement | Swivel |
| Assembly Required | Yes (approx. 10 minutes) |
| Certifications | BIFMA certified, SGS-certified cylinders |
Warranty and Support
For warranty information, technical support, or to order replacement parts, please contact DUMOS customer service through the retailer where you purchased the product or visit the official DUMOS website. Please have your model number (2193BK-DUFA-305) and purchase date available when contacting support.
