Janome AirThread 2000D Professional Service Bulletin page 50

Removing and Installing Upper
Gently, connect the 2 metal pipes. Using the tweezers, gently start
pushing the clear rubber tube up until the rubber tube is the middle

of the 2 metal pipes.

Looper
Tighten the 2.0mm hexagon screw temporarily, be
sure the upper looper does not hit the lower looper.
50