Active Care Medical Cobalt Owner's Manual page 10

To disassemble the chair, remove the seat then use the
included Allen wrench to loosen and remove the bolt.
Carefully slide the front and rear sections apart.
For added ease of disassembly, your Cobalt also comes
with a spring lever that can be installed in place of the bolt.
With the spring lever installed, simply pulling up on the
lever allows you to separate the front and rear sections.
To install the spring lever, remove the bolt.
9 Cobalt/ Cobalt X23 Owners Manual