Invacare Zephyr User Manual page 134

If a lifter is available the seat unit must be pulled in an
upward direction. To do this the piston head on the actuator
must be released and pulled out of its guideway in the lifter
unit.
• Pull the actuator piston head forward in order to release
the piston head, at the same time pulling the lifter
upward until the engaging mechanism (1) is heard to
lock in place.
• Use the Allen key 6 mm to loosen the screws (1) on both
sides and remove.
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