Backrest Adjuster, Removing And Installing: Removing
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-- Turn backrest adjustment wheel -1- until you see a locking tab at back -arrow A-. Possibly use a flashlight.
-- Engage Assembly Tool:3399 and pry it in the direction of the -arrow B-.
-- Turn backrest adjustment wheel about 120° more.
-- Engage Assembly Tool:3399 and pry it in the direction of the -arrow B-.
-- Remove backrest adjustment wheel.