MULLSJÖ Office Chair Assembly Instructions

Product Overview

This document provides assembly instructions for the MULLSJÖ office chair.

Brand: IKEA

Description: An illustration of the MULLSJÖ office chair, featuring a swivel base and armrests. The chair is designed for office use.

Manufacturer: IKEA of Sweden

Important Safety Information

Warning! Only trained personnel may replace or repair seat height adjustment components with energy accumulators. ℹ️

This safety warning is provided in multiple languages within the original documentation.

Included Components

Allen key (1x) [Part ID: 108490]
Screws (4x) [Part ID: 152549]
Screws (8x) [Part ID: 10114349]

Assembly Steps

Step 1: Attach Base to Seat Mechanism

Place the seat upside down on a soft surface like a rug. Align the base frame with the seat mechanism and secure it using 4x screws (152549) with the provided Allen key (108490). [Diagram shows seat upside down on a rug, base being attached ➡️].

Step 2: Attach Armrests

Attach the armrests to the sides of the seat mechanism. Secure each armrest with 4x screws (152549) using the Allen key (108490).

Step 3: Insert Gas Lift Cylinder

Insert the gas lift cylinder into the center of the base. [Diagram shows cylinder being pushed down ⬇️ into the base].

Step 4: Mount Seat Assembly

Carefully place the assembled seat unit onto the gas lift cylinder. [Diagram shows seat being lowered onto the cylinder ⬇️].

Step 5: Attach Seat Cushion

Align the seat cushion with the seat mechanism and press it firmly into place. Secure using 8x fasteners. [Diagram shows cushion being pressed down, with a close-up of fasteners engaging].

Step 6: Attach Backrest

Align the backrest with the seat mechanism and press it into place until it clicks. Secure using 9x fasteners. [Diagram shows backrest being attached, with "Click!" indicated].

Step 7: Secure Armrests to Backrest

Attach the armrests to the backrest and seat. Secure using 4x screws (10114349) with the Allen key (108490).

Step 8: Adjust Seat Height

The chair is now assembled. Adjust the seat height and swivel as needed. [Diagram shows a person sitting and adjusting the chair's height and rotation ↕️].

Seat Cushion and Backrest Attachment/Detachment

These steps detail how to detach and re-attach the seat cushion and backrest, potentially for cleaning or replacement.

Step 1: Detach Seat Cushion

Locate the release mechanism on the underside of the seat and operate it to detach the seat cushion. [Diagram shows a person ? operating a lever under the seat].

Step 2: Release Cushion Fasteners

Release 2x fasteners securing the seat cushion to the base. [Diagram shows hands releasing fasteners].

Step 3: Release More Cushion Fasteners

Release an additional 8x fasteners from the seat cushion. [Diagram shows hands releasing fasteners].

Step 4: Release Further Cushion Fasteners

Release a further 3x fasteners. [Diagram shows hands releasing fasteners].

Step 5: Release Final Cushion Fasteners

Release the final 5x fasteners. [Diagram shows hands releasing fasteners].

Step 6: Re-attach Backrest

Align the backrest with the seat and secure it using 8x fasteners. [Diagram shows backrest being attached].

Step 7: Re-attach Seat Cushion

Align the seat cushion with the seat mechanism and press it into place until it clicks. Secure using 9x fasteners. [Diagram shows seat cushion being attached, with "Click!" indicated].

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