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Step 3: Mounting the backrest on the base frame
Attach the assembled part of the backrest to the base frame. Use the screws
(6), washers (8) and lock nuts (7).
Now tighten all screws well.
The rotating side
brackets must point
downwards.
Lift the base
frame into the
swivelling bra-
ckets and fix it
with screws, nuts
and washers.