• Remove the backrest cushion.
• Loosen the straps of the sling backrest or remove the Flex3 backrest.
• Loosen and remove both screws (5) of the actuator fixation bracket.
• Remove the cover of the actuator fixation bracket.
• Loosen and remove the screws and nuts (2, 4) on the upper and lower actuator fixation
bracket on both sides.
• Adjust the backrest fixation (6) for the new backrest width according to the table on page 112.
• Insert the screws (2) through the cover of the actuator fixation bracket and the corresponding
holes of the backrest fixation to the actuator fixation.
• Fasten these with the nuts (4).
• Reposition the cover of the actuator fixation bracket.
• Insert and tighten the screws (5) again.
• Adjust the straps of the sling backrest to the new width or install the adjusted Flex 3 backrest.
• Install the backrest cushion.
• Perform a function check of the chair
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