ActiveAid 1100 Owner's Manual page 14

25. If the height-adjustable armrests were ordered,
remove the two hex bolts in the clamp of the armrest
clamp assembly.
26. Place armrest and armrest clamp onto the back frame
as shown. Insert the hex bolt and hand start two bolts into
the clamp.
27. Place armrest and armrest clamp 8 1/4" from the top
of the frame and tighten bolts securely.
Repeat steps 21-27 for the other armrest.
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25.
26.
27.