7
Hook of looper cover position detecting arm
MODEL: AirThread 2000D
Replacing External Parts
Looper cover
Looper cover
To remove :
1.  Remove the base plate.
2.  Remove the setscrews (2 pcs.).
3.  Release the hook of looper cover position detecting 
arm from the looper cover shaft.
4.  Remove the looper cover.
Setscrew
Hook of looper cover  
position detecting arm
Looper 
cover shaft
Setscrew
To attach:
1.  Set the looper threader switch lever to the  
  "THREADING" (right side). 
  Make sure that the looper cover position detecting  
  arm comes in front of the looper. threader switch  
  lever connecting lever (shown as the looper cover  
  position detecting arm on top the looper threader  
  switch lever connecting lever in the figure).
2.  Put the hook of looper cover position detecting arm on 
the looper cover shaft.
3.  Tighten the setscrews (2 pcs).
4.  Attach the base plate.
Looper cover 
position detecting arm
Looper cover shaft
Looper threader switch lever 
connecting lever